CN115718051A - Method for detecting diffusion range of Ordovician limestone soluble aquifer slurry - Google Patents
Method for detecting diffusion range of Ordovician limestone soluble aquifer slurry Download PDFInfo
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Abstract
The invention provides a method for detecting the diffusion range of Ordovician limestone soluble aquifer slurry, which comprises the following steps: arranging a grouting test branch drill hole in an Ordovician limestone water-bearing stratum in a target treatment area, symmetrically arranging an even number of sampling test branch drill holes in the horizontal direction of the grouting test branch drill holes according to a first interval by taking the grouting test branch drill holes as a reference, and arranging a plurality of sampling test branch drill holes in the lower part of the grouting test branch drill holes in the vertical direction according to a second interval by taking the grouting test branch drill holes as a base line; after grouting operation is completed on a grouting position in a grouting test branch drill hole, collecting rock debris in a target sampling interval of each sampling test branch drill hole so as to perform mineral analysis on each rock debris; and determining the slurry diffusion range of the Ordovician limestone water-bearing stratum after grouting operation according to the number and the position of the rock debris containing the target minerals in the statistically collected rock debris. The invention can improve the economy and the timeliness and also effectively improve the accuracy of the detection result.
Description
Technical Field
The invention relates to the technical field of mine water damage prevention and control, in particular to a method for detecting the diffusion range of slurry of an Ordovician limestone water-bearing stratum.
Background
In recent years, with the gradual increase of the coal mining depth, hydrogeological conditions of forests are more complex, the difficulty of exploration and treatment of a concealed structure is obviously improved, deep mining is more seriously threatened by water-soluble harm of limestone, and the problem of water inrush disaster faced by high-pressure water mining is more serious. The technology for treating the coal seam area with pressure mining and ground directional drilling is a new technology for treating water damage, which is developed in recent years, mainly aims at grouting, reinforcing and transforming a coal seam floor aquifer and plugging a water guide channel, and has the advantages of large area of a one-time treatment area, high construction efficiency, good grouting effect and relatively low cost. The technology is used for constructing directional horizontal multi-branch drilling holes on the ground, grouting transformation is carried out on a target stratum selected by a coal seam bottom plate, a water guide channel between the coal seam and a target aquifer is blocked, the target aquifer is transformed, and the water blocking capability of a waterproof layer is enhanced, so that effective prevention and control of water damage of the bottom plate are realized.
The key of the grouting treatment effect of the Ordovician limestone karst aquifer is the setting of the distance between horizontal branch holes, which is determined by the diffusion range of the regional slurry. The design of the horizontal branch hole spacing is not suitable to be too large or too small. If the distance between the branch holes is too large and the diffusion range of the grout is limited, a large number of blank areas and weak areas which are not transformed by grouting can be left, and unfilled water guide channels exist or the thickness of a reinforced water-resisting layer is not enough, so that the treatment engineering effect is greatly reduced, and the safety of a mine is seriously threatened; if the distance between the branch holes is too small, on one hand, the engineering quantity is greatly increased, the drilling amount is increased, on the other hand, the construction period is severely restricted, the economy is reduced, and the waste of manpower, material resources and time is caused. Therefore, the detection of the diffusion range of the slurry of the Ordovician limestone soluble aquifer is of great significance to the high-efficiency and high-quality implementation of the treatment project of the ground area.
At present, in the grouting transformation process of the Ordovician limestone solution aquifer of a coal seam floor, the selection of the slurry diffusion range is mostly determined according to the experience of field engineering practice, or is obtained by utilizing a tracer testing method, an indoor slurry diffusion simulation experiment method and the like. However, according to the empirical determination method of the field engineering practice, the accuracy of the method is often large in error; the tracer test method needs a large amount of tracer, has high cost and low accuracy of a detection result, and also has hidden danger of polluting underground water; the indoor slurry diffusion simulation experiment method is too complex and fussy in operation process due to the fact that actual geological conditions are relatively complex and limited by indoor limited conditions.
Disclosure of Invention
The invention provides a method for detecting the diffusion range of slurry of an austenitic limestone soluble aquifer, which is used for solving the defects of large detection result error, high cost, water environment pollution and complex operation in slurry diffusion range detection in the prior art.
The invention provides a method for detecting the diffusion range of slurry of an Ordovician limestone soluble aquifer, which comprises the following steps:
arranging a grouting test branch drill hole in an Ordovician limestone water-bearing stratum in a target treatment area, symmetrically arranging an even number of sampling test branch drill holes in the horizontal direction of the grouting test branch drill holes according to a first interval by taking the grouting test branch drill holes as a reference, and arranging a plurality of sampling test branch drill holes in the lower part of the grouting test branch drill holes in the vertical direction according to a second interval by taking the grouting test branch drill holes as a base line;
after grouting operation is completed on the grouting position in the grouting test branch drill hole, rock debris in a target sampling interval of each sampling test branch drill hole is collected so as to perform mineral analysis on each rock debris; the target sampling interval is set based on the grouting position;
determining the diffusion range of the slurry after grouting operation is carried out on the Ordovician limestone karst aquifer according to the number and the position of the rock fragments containing the target mineral in the rock fragments which are counted and collected; the target mineral is determined by comparing and analyzing the rock debris sample of the Ordovician limestone solution aquifer with the rock consolidation body of the grouting material used in the target treatment area.
According to the method for detecting the diffusion range of the grout of the Ordovician limestone soluble aquifer, the grouting test branch drill hole penetrates through a complete rock stratum region and a tectonic rock stratum region in the Ordovician limestone soluble aquifer; the grouting locations include a first grouting location in the full formation section region and a second grouting location in the formation section region.
According to the method for detecting the diffusion range of the grout in the Ordovician limestone soluble aquifer, the diffusion range of the grout after grouting operation of the Ordovician limestone soluble aquifer is determined according to the number and the position of rock fragments containing target minerals in the statistically collected rock fragments, and the method comprises the following steps:
determining a first slurry diffusion range of the Ordovician limestone solution aquifer in the horizontal direction after grouting operation according to the counted number of rock debris containing the target mineral in each sampling test branch drilling hole in the horizontal direction of the complete rock stratum region and the tectonic rock stratum region;
determining a second slurry diffusion range of the Ordovician limestone water-soluble stratum in the vertical direction after grouting operation according to the counted number of rock debris containing the target mineral in each sampling test branch drilling hole in the vertical direction of the complete rock stratum region and the tectonic rock stratum region;
and determining the slurry diffusion range of the Ordovician limestone water-bearing stratum after grouting operation according to the first slurry diffusion range and the second slurry diffusion range.
According to the method for detecting the diffusion range of the slurry of the Ordovician limestone solution aquifer, the first interval comprises a first sub-interval and a second sub-interval; the even number of sampling test branch drill holes comprise a first sampling test branch drill hole, a second sampling test branch drill hole, a third sampling test branch drill hole and a fourth sampling test branch drill hole; with slip casting test branch drilling is the baseline, according to first interval in slip casting test branch drilling's horizontal direction symmetrical arrangement even number sampling test branch drilling includes:
taking the grouting test branch drill hole as a base line, symmetrically arranging the first sampling test branch drill hole and the second sampling test branch drill hole in the horizontal direction of the grouting test branch drill hole according to a first sub-interval, and symmetrically arranging the third sampling test branch drill hole and the fourth sampling test branch drill hole in the horizontal direction of the grouting test branch drill hole according to a second sub-interval; the value range of the first sub-interval is 20-25 meters; the value range of the second sub-interval is 45 meters to 55 meters.
According to the method for detecting the diffusion range of the slurry of the aquifer dissolved in the Ordovician limestone, the rock debris in the target sampling interval of each sampling test branch drill hole is collected, and the method comprises the following steps:
respectively determining first sampling intervals of the complete formation section areas in the first sampling test branch drilling hole, the second sampling test branch drilling hole, the third sampling test branch drilling hole and the fourth sampling test branch drilling hole according to the first grouting position;
according to the second grouting position, second sampling intervals of the formation section areas in the first sampling test branch drilling hole, the second sampling test branch drilling hole, the third sampling test branch drilling hole and the fourth sampling test branch drilling hole are respectively determined;
collecting rock debris in the first sampling interval and the second sampling interval in the first sampling test branch drill hole and collecting rock debris in the first sampling interval and the second sampling interval in the second sampling test branch drill hole according to a preset sampling interval;
under the condition that the first quantity and the second quantity are determined to exceed a preset quantity threshold value, collecting rock debris in the first sampling interval in the third sampling test branch drilling hole and the fourth sampling test branch drilling hole according to the preset sampling interval, otherwise, not collecting the rock debris in the first sampling interval in the third sampling test branch drilling hole and the fourth sampling test branch drilling hole;
the first quantity is the quantity of rock fragments containing the target mineral collected in a first sampling interval of the first sampling test branch drill hole; the second quantity is the quantity of the rock fragments containing the target mineral collected in the first sampling interval of the second sampling test branch drilling;
under the condition that the third quantity and the fourth quantity are determined to exceed the preset quantity threshold value, collecting rock debris in the second sampling interval in the third sampling test branch drill hole and the fourth sampling test branch drill hole according to the preset sampling interval, otherwise, not collecting the rock debris in the second sampling interval in the third sampling test branch drill hole and the fourth sampling test branch drill hole;
the third quantity is the quantity of the rock fragments containing the target mineral collected in the second sampling interval of the first sampling test branch drilling hole; the fourth quantity is the quantity of the rock debris containing the target mineral collected in the second sampling interval of the second sampling test branch drill hole;
the target sampling interval comprises the first sampling interval and the second sampling interval.
According to the method for detecting the diffusion range of the grout in the Ordovician limestone karst aquifer, the first grout diffusion range in the horizontal direction after the grouting operation of the Ordovician limestone karst aquifer is determined according to the statistics of the number of the detritus containing the target mineral in each sampling test branch drilling hole in the horizontal direction of the complete rock stratum section region and the tectonic rock stratum region, and the method comprises the following steps:
determining the diffusion range of the slurry in the horizontal direction of the complete rock stratum area after grouting operation of the Ordovician limestone-soluble aquifer according to the first sub-interval under the condition that the first quantity and the second quantity are smaller than the preset quantity threshold;
or under the condition that the first number and the second number are both determined to exceed the preset number threshold value, and the fifth number and the sixth number are both determined to be smaller than the preset number threshold value, determining the slurry diffusion range in the horizontal direction of the complete rock stratum section area after the Ordovician limestone solution aquifer is subjected to grouting operation based on the first sub-interval and the second sub-interval;
the fifth quantity is the quantity of the rock debris containing the target mineral collected in the first sampling interval of the third sampling test branch drill hole; the sixth number is the number of rock fragments containing the target mineral collected in the first sampling interval of the fourth sampling test branch drill hole;
under the condition that the third quantity and the fourth quantity are smaller than the preset quantity threshold value, determining a slurry diffusion range in the horizontal direction of the tectonic rock stratum area after the Ordovician limestone water-soluble aquifer performs grouting operation according to the first sub-interval;
or, under the condition that the third quantity and the fourth quantity are both determined to exceed the preset quantity threshold value, and the seventh quantity and the eighth quantity are both determined to be smaller than the preset quantity threshold value, determining a slurry diffusion range in the horizontal direction of the tectonic rock stratum section area after the Ordovician limestone-soluble aquifer performs the grouting operation based on the first sub-interval and the second sub-interval;
the seventh quantity is the quantity of the rock debris containing the target mineral collected in the second sampling interval of the third sampling test branch drill hole; the eighth quantity is the quantity of the rock fragments containing the target mineral collected in the second sampling interval of the fourth sampling test branch drill hole;
the first slurry diffusion range comprises a slurry diffusion range of the Ordovician limestone water-bearing layer in the horizontal direction of the tectonic rock stratum area after grouting operation and a slurry diffusion range of the Ordovician limestone water-bearing layer in the horizontal direction of the tectonic rock stratum area after grouting operation.
According to the method for detecting the diffusion range of the slurry of the Ordovician limestone solution aquifer, provided by the invention, the second spacing comprises a third sub-spacing and a fourth sub-spacing; the plurality of sample test branch boreholes comprise a fifth sample test branch borehole and a sixth sample test branch borehole; the said many sampling test branch drilling uses the said slip casting test branch drilling as the base line, according to the second interval in the said slip casting test branch drilling's lower part of vertical direction arranges many sampling test branch drilling, include:
taking the grouting test branch drill hole as a base line, arranging a fifth sampling test branch drill hole in the vertical direction of the grouting test branch drill hole according to a third sub-interval, and arranging a sixth sampling test branch drill hole in the vertical direction of the grouting test branch drill hole according to a fourth sub-interval; the value range of the third sub-interval is 15 meters to 20 meters; the value range of the fourth sub-interval is 35 meters to 45 meters.
According to the method for detecting the diffusion range of the slurry of the aquifer dissolved in the Ordovician limestone, the rock debris in the target sampling interval of each sampling test branch drill hole is collected, and the method comprises the following steps:
respectively determining a third sampling interval of the complete formation section area in the fifth sampling test branch drilling hole and the sixth sampling test branch drilling hole according to the first grouting position;
according to the second grouting position, respectively determining fourth sampling intervals of the tectonic rock stratum zone in the fifth sampling test branch drilling hole and the sixth sampling test branch drilling hole;
collecting rock debris in the third sampling interval and the fourth sampling interval in the fifth sampling test branch drill hole according to a preset sampling interval;
collecting rock debris in the third sampling interval in the sixth sampling test branch drill hole according to the preset sampling interval under the condition that the ninth quantity is determined to exceed the preset quantity threshold, otherwise, not collecting the rock debris in the third sampling interval in the sixth sampling test branch drill hole; the ninth number is the number of rock fragments containing the target mineral collected in the third sampling interval of the fifth sampling test branch drill hole;
collecting rock debris in the fourth sampling interval in the sixth sampling test branch drill hole according to the preset sampling interval under the condition that the tenth quantity is determined to exceed the preset quantity threshold value, otherwise, not collecting the rock debris in the fourth sampling interval in the sixth sampling test branch drill hole; the tenth quantity is the quantity of the rock fragments containing the target mineral collected in the fourth sampling interval of the fifth sampling test branch drill hole;
the target sampling interval includes the third sampling interval and the fourth sampling interval.
According to the method for detecting the diffusion range of the grout in the Ordovician limestone karst aquifer, provided by the invention, the second grout diffusion range in the vertical direction after the grouting operation of the Ordovician limestone karst aquifer is determined according to the statistics of the number of rock fragments containing the target mineral in each sampling test branch drilling hole in the vertical direction of the complete rock stratum region and the tectonic rock stratum region, and the method comprises the following steps:
determining a slurry diffusion range in the vertical direction of the complete rock stratum area after the Ordovician limestone water-soluble aquifer performs grouting operation according to the third sub-interval under the condition that the ninth quantity is smaller than the preset quantity threshold;
or, under the condition that the ninth quantity is determined to exceed the preset quantity threshold value and the eleventh quantity is determined to be smaller than the preset quantity threshold value, determining the slurry diffusion range of the Ordovician limestone water-soluble aquifer in the vertical direction of the complete rock stratum area after grouting operation is carried out on the Ordovician limestone water-soluble aquifer based on the third sub-interval and the fourth sub-interval;
the eleventh quantity is the quantity of the rock fragments containing the target mineral collected in the third sampling interval of the sixth sampling test branch drill hole;
determining a slurry diffusion range in the vertical direction of the tectonic rock segment area after grouting operation is performed on the Ordovician limestone-soluble aquifer according to the third sub-interval under the condition that the tenth quantity is smaller than the preset quantity threshold;
or, under the condition that the tenth quantity is determined to exceed the preset quantity threshold value and the twelfth quantity is determined to be smaller than the preset quantity threshold value, determining the slurry diffusion range in the vertical direction of the tectonic rock stratum section area after the grouting operation of the Ordovician limestone-soluble aquifer based on the third sub-interval and the fourth sub-interval;
the twelfth number is the number of rock fragments containing the target mineral collected in a fourth sampling interval of the sixth sampling test branch drill hole;
the second slurry diffusion range comprises a slurry diffusion range of the Ordovician limestone water-bearing layer in the vertical direction of the tectonic rock stratum area after grouting operation and a slurry diffusion range of the Ordovician limestone water-bearing layer in the vertical direction of the tectonic rock stratum area after grouting operation.
According to the method for detecting the diffusion range of the slurry of the Ordovician limestone soluble aquifer, the grouting material used in the target treatment area is cement-based slurry which is medium-low density thin slurry with the density ranging from 1.2kg/L to 1.3 kg/L;
the grouting ending standard in the grouting operation is that the pump capacity of a grouting pump reaches a target pump capacity range, the total grouting pressure meets a target pressure condition, and the stable time of the total grouting pressure reaches a target time range; the target pressure condition is determined based on a maximum hydrostatic pressure of the aquifer being infused.
The method for detecting the diffusion range of the grout in the Ordovician limestone soluble aquifer provided by the invention comprises the steps of detecting target minerals for distinguishing rock debris samples of the Ordovician limestone soluble aquifer and rock masses of grouting materials under actual geological conditions in a treatment area by adopting a 'detection-injection-detection' integrated method, detecting the back-discharge rock debris in test branch drill holes arranged around after grouting operation is completed in grouting test branch drill holes by using the target minerals as tracer objects, determining the diffusion range of the grout in the Ordovician limestone soluble aquifer by detecting the number and the positions of the rock debris containing the target minerals, completing grouting reinforcement treatment on the stratum covered by the test branch holes in the treatment area while testing and analyzing, and avoiding other preparation and implementation work in the treatment field.
Drawings
In order to more clearly illustrate the technical solutions of the present invention or the prior art, the drawings needed for the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.
FIG. 1 is a schematic flow chart of a method for detecting the diffusion range of Ordovician limestone soluble aquifer slurry provided by the invention;
FIG. 2 is a schematic diagram of a plane layout of a branch borehole in the method for detecting the diffusion range of the slurry of the Ordovician limestone solution aquifer provided by the invention;
FIG. 3 is a schematic diagram of a vertical layering arrangement of branch drill holes in the method for detecting the diffusion range of the slurry of the Ordovician limestone solution aquifer provided by the invention;
FIG. 4 is a second schematic diagram of the arrangement of the branch drilling planes in the method for detecting the diffusion range of the slurry in the aqueous layer of Ordovician limestone provided by the present invention;
FIG. 5 is a second schematic view of the vertical layering arrangement of the branch drill holes in the method for detecting the diffusion range of the slurry in the Ordovician limestone solution aquifer provided by the invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
The method for detecting the diffusion range of the slurry of the Ordovician limestone soluble aquifer is described in the following with reference to FIGS. 1 to 5.
Fig. 1 is a schematic flow chart of a method for detecting the diffusion range of the slurry of the ohalite-soluble aquifer, which is provided by the invention and is shown in fig. 1, and the method comprises the following steps: step 110, step 120 and step 130.
Specifically, the target treatment area described in the embodiment of the present invention refers to a geological area where grouting treatment needs to be performed to form a water-resisting layer with a certain thickness. In this embodiment, the ohalite-soluble aquifer in the target treatment area may be drilled through a predetermined horizontal branch drill.
The first distance described in the embodiment of the present invention refers to a horizontal distance between an even number of sampling test branch drill holes and a grouting test branch drill hole, which are symmetrically arranged in the horizontal direction of the grouting test branch drill holes. The grouting test branch drilling hole refers to a directional branch drilling hole for a grouting operation test, and the sampling test branch drilling hole refers to a directional branch drilling hole for collecting rock debris samples of an Ordovician limestone solution aquifer.
The second distance described in the embodiment of the present invention refers to a vertical distance between each sampling test branch borehole and the grouting test branch borehole, where a plurality of sampling test branch boreholes are arranged at the lower part of the grouting test branch borehole in the vertical direction.
The target sampling interval described in the embodiments of the present invention is set based on the grouting position. And if the grouting position in the grouting test branch drill hole is determined, setting a sampling interval in each sampling test branch drill hole according to the grouting diffusion direction.
It should be noted that, in the embodiment of the present invention, the target mineral needs to be determined first. The target mineral is determined by performing mineral comparison analysis on a rock debris sample of the Ordovician limestone solution aquifer and a grouting material rock formation body used in a target treatment area under the actual geological condition on site, and is used for distinguishing the rock debris sample of the Ordovician limestone solution aquifer from the grouting material rock formation body. If the grouting material adopts cement-based slurry, the unique target mineral calcium hydroxide of the concreted cement-based slurry concretion body can be confirmed. In addition, the grouting material may also be other grouting materials, such as clay cement slurry, fly ash cement slurry, etc., as long as the target mineral capable of distinguishing the mineral component between the slurry material and the rock debris of the target geological interval is found.
More specifically, rock debris of the Ordovician limestone of a target geological interval of a target treatment area is collected through directional drilling branch drilling, a cement-based slurry concretion body used for grouting treatment is taken to be respectively subjected to mineral composition analysis testing, and target minerals of the two are determined and distinguished by analyzing the mineral composition difference between the two.
Optionally, the grouting test branch drill hole penetrates through a complete rock stratum section area and a tectonic rock stratum section area in the Ordovician limestone-soluble aquifer; the grouting locations include a first grouting location in the complete formation section region and a second grouting location in the formation section region. Thus, the target geological interval of the target remediation zone may be a complete and tectonic rock interval. Meanwhile, it can be understood that each sampling test branch drilling hole also penetrates through the complete stratum section area and the tectonic stratum section area in the Ordovician limestone solution aquifer.
According to the method provided by the embodiment of the invention, the slurry diffusion ranges of different typical rock stratum zone areas are analyzed by considering the complete rock stratum zone area and the tectonic rock stratum zone area, so that the applicability of the slurry diffusion range detection method for the Ordovician limestone soluble aquifer provided by the invention is increased.
The tectonic rock stratum section refers to a rock stratum section which has a large stratum crushing degree in the Ordovician limestone water-bearing stratum and contains stratum development structures such as faults, fractures and the like; the complete rock stratum section refers to a rock stratum section with small stratum crushing degree, few faults or even no faults and relatively complete whole rock stratum in the Ordovician limestone solution aquifer.
It should be further noted that, because most of the directional drilling horizontal branch holes are bare hole sections, the coring difficulty is high, and therefore, the rock debris flowing back in the branch hole drilling process is used for representing lithology conditions of different well depth positions of the target geological interval. The method is characterized in that a grouting material used in a target treatment area, such as a cement-based grouting material, is used as a tracing medium, and the unique mineral composition of the grouting material concretion body is determined by analyzing the mineral composition difference between the grouting material concretion body and the lithology of the stratum of a target geological interval. By the method, the rest branch return rock debris around the grouting branch is analyzed and tested, whether the target mineral is contained is identified, and the diffusion condition of the slurry is determined.
Further, mineral composition analysis tests are adopted for the returned rock debris of the Ordovician limestone aquifer in the target treatment area and the stone body of the grouting material (cement-based slurry) used in the target treatment area, for example, an X-Ray Diffraction (XRD) -based analysis method can be adopted, the difference of the mineral compositions of the returned rock debris and the stone body of the grouting material is compared, for example, the calcium hydroxide which is a target mineral and is unique to the cemented ore body of the grouting-based slurry can be determined and distinguished, and the condition of slurry diffusion of the Ordovician limestone karst aquifer can be obtained by analyzing whether the returned rock debris of the sampling branch at the periphery of the branch hole of the grouting test contains the calcium hydroxide, the quantity and the distribution range.
Further, in step 110, a grouting test branch drill hole is arranged in the aqueous layer of the Ordovician limestone in the target treatment area, and even number of sampling test branch drill holes are symmetrically arranged in the horizontal direction of the grouting test branch drill hole according to the first interval by taking the grouting test branch drill hole as a reference. The number of the even number of sampling test branch drill holes can be adaptively selected according to actual construction requirements, and the value can be 4 or 6.
Optionally, the first pitch comprises a first sub-pitch and a second sub-pitch; the even number of sampling test branch drill holes comprise a first sampling test branch drill hole, a second sampling test branch drill hole, a third sampling test branch drill hole and a fourth sampling test branch drill hole; use experimental branch drilling of slip casting as the baseline, according to first interval at experimental branch drilling of slip casting horizontal direction on symmetrical arrangement even number sampling test branch drilling, include:
taking the grouting test branch drill hole as a base line, symmetrically arranging a first sampling test branch drill hole and a second sampling test branch drill hole in the horizontal direction of the grouting test branch drill hole according to a first sub-interval, and symmetrically arranging a third sampling test branch drill hole and a fourth sampling test branch drill hole in the horizontal direction of the grouting test branch drill hole according to a second sub-interval; the value range of the first sub-interval is 20 meters to 25 meters; the second sub-pitch has a value in the range of 45 meters to 55 meters.
Fig. 2 is one of schematic plane layout diagrams of branch drill holes in the method for detecting the diffusion range of the slurry of the austenitic limestone-soluble aquifer, and as shown in fig. 2, a group of five directional branch drill holes are arranged in the horizontal direction of the austenitic limestone-soluble aquifer in the target treatment area, wherein the group of five directional branch drill holes comprises a grouting test branch drill hole (1), a first sampling test branch drill hole (2), a second sampling test branch drill hole (3), a third sampling test branch drill hole (4) and a fourth sampling test branch drill hole (5). The group of directional branch boreholes traverses the entire section area of the rock and the tectonic zone area in the Ordovician aquifer. And constructing according to the construction sequence of the branch holes of the middle part first and the two sides, wherein the branch hole is firstly constructed for the grouting test in the middle, and the branch hole is subsequently constructed for the sampling test. The step mainly forms a plane design scheme of directional branch drilling which penetrates through the complete rock interval and the structural rock interval in the target treatment area.
As shown in fig. 2, a zone with a complete and tectonic interval is selected in the target remediation zone where a set of five directional branch boreholes are deployed. Wherein, the two sides of the grouting test branch drill hole (1) are short-distance sampling test branch holes, namely a first sampling test branch drill hole (2) and a second sampling test branch drill hole (3), and the distance between the grouting test branch drill hole (1) and the first sampling test branch drill hole is a first sub-distance which can be expressed as R1; the remote sampling test branch holes, namely the third sampling test branch hole (4) and the fourth sampling test branch hole (5), are arranged outside the first sampling test branch hole (2) and the second sampling test branch hole (3), and the distance from the short-distance sampling test branch hole can be R2, namely, the distance between the third sampling test branch hole (4) and the fourth sampling test branch hole (5) and the grouting test branch hole (1) is a second sub-distance which can be expressed as R1+ R2.
In the embodiment, R1< R2 may be selected, that is, in the embodiment, a relatively small first sub-interval R1 may be set according to past experience and the crushing or integrity of the regional stratum, and data of the target mineral may be acquired at the R1 as far as possible, otherwise, the R1 is designed too large, and effective test data of slurry diffusion cannot be acquired due to a limited slurry diffusion range in the R1 range; r1 is smaller than R2, if the target mineral is detected at the position of R1, the sampling test branch drill hole at the position of R2 can be judged according to the quantity and the range of the target mineral.
Further, in step 110, a plurality of sampling test branch boreholes are arranged at a second interval at a lower part of the grouting test branch boreholes in the vertical direction, with the grouting test branch boreholes as a baseline. Wherein, the quantity of many sampling test branch drilling can carry out the adaptability according to actual construction demand and select, can take the value to be 2, 3 etc..
According to the method provided by the embodiment of the invention, by considering the physical diffusion rule of the grouting slurry in the horizontal direction, even number of sampling test branch drill holes are symmetrically arranged in the horizontal direction of the grouting test branch drill holes according to the preset interval, construction is carried out according to the branch hole construction sequence of 'first middle and then two sides', a test geographical scene is provided for slurry diffusion range detection in the horizontal direction after the subsequent test branch drill hole construction grouting operation, and the accuracy and timeliness of the slurry diffusion range detection are improved.
Optionally, the second pitch comprises a third sub-pitch and a fourth sub-pitch; the plurality of sample test branch boreholes comprise a fifth sample test branch borehole and a sixth sample test branch borehole; many sample test branch drilling use slip casting test branch drilling as the baseline, arrange many sample test branch drilling according to the second interval in the lower part of the perpendicular direction of slip casting test branch drilling, include:
taking the grouting test branch drill holes as a base line, arranging fifth sampling test branch drill holes in the vertical direction of the grouting test branch drill holes according to a third sub-interval, and arranging sixth sampling test branch drill holes in the vertical direction of the grouting test branch drill holes according to a fourth sub-interval; the value range of the third sub-interval is 15 meters to 20 meters; the value range of the fourth sub-interval is 35 meters to 45 meters.
It is understood that the third sub-pitch may have the same value as the first sub-pitch, and the fourth sub-pitch may have the same value as the first sub-pitch.
The vertical diffusion of the slurry is also an important parameter, since the fractured structures develop deeper vertically. In order to obtain the vertical diffusion range of the slurry of the complete rock interval and the tectonic rock interval of the area, a layered branch drilling arrangement mode is adopted.
Fig. 3 is one schematic diagram of vertical layered arrangement of branch drill holes in the method for detecting the diffusion range of the slurry of the aqueous aquifer dissolved in the ultramarine limestone, and as shown in fig. 3, a group of three directional branch drill holes are arranged at the lower part of the ultramarine limestone in the vertical direction in the target treatment area, wherein the three directional branch drill holes comprise a grouting test branch drill hole (1), a fifth sampling test branch drill hole (6) and a sixth sampling test branch drill hole (7).
Similarly, the grouting test branch drill hole (1) is used as an upper grouting hole, and a fifth sampling test branch drill hole (6) and a sixth sampling test branch drill hole (7) are respectively arranged at a third sub-interval and a fourth sub-interval at the lower part of the grouting test branch drill hole in the vertical direction. Assuming that the distance between the grout test branch borehole (1) and the fifth sample test branch borehole (6) is denoted as R1 and the distance between the fifth sample test branch borehole (6) and the sixth sample test branch borehole (7) is denoted as R2, the third sub-pitch is R1 and the fourth sub-pitch is R1+ R2. At the same time, the group of directional branch holes also penetrate through the complete rock stratum section and the formation rock stratum section area. The grouting test branch drill hole (1) at the upper part is constructed firstly, and the fifth sampling test branch drill hole (6) and the sixth sampling test branch drill hole (7) are constructed subsequently respectively. The step mainly forms a vertical design scheme of directional branch drilling which penetrates through the complete rock interval and the structural rock interval in the treatment area.
According to the method provided by the embodiment of the invention, by considering the physical diffusion rule of the grouting slurry in the vertical direction, a plurality of sampling test branch drill holes are arranged at the lower part of the grouting test branch drill holes in the vertical direction according to the preset interval, and the construction is carried out according to the construction sequence of the branch holes from near to far, so that a test geographical scene is provided for detecting the slurry diffusion range in the vertical direction after the subsequent test branch drill hole construction grouting operation, and the accuracy and the timeliness of the slurry diffusion range detection are improved.
Further, in step 120, after the grouting position in the grouting test branch drill hole is grouted, the rock debris in the target sampling interval of each sampling test branch drill hole is sampled to perform mineral analysis on each rock debris; the target sampling interval is set based on the grouting position.
In this step, the grouting material used in the target treatment area may be a cement-based slurry, which is a medium-low density slurry with a density in the range of 1.2kg/L to 1.3 kg/L.
The grouting ending standard in the grouting operation is that the pump capacity of a grouting pump reaches a target pump capacity range, the total grouting pressure meets a target pressure condition, and the time for stabilizing the total grouting pressure reaches a target time range; the target pressure condition is determined based on a maximum hydrostatic pressure of the aquifer being infused.
Specifically, in the embodiment of the invention, the cement-based slurry is selected, and the adopted grouting process is that the medium-low density slurry fully reinforces the stratum, and the medium-low density slurry fills small cracks in the medium and far positions to enlarge the diffusion range. Meanwhile, the target pump capacity range can be set to be below 35L/min, and then the judgment standard of grouting ending in grouting operation is as follows: the pump capacity of the grouting pump is less than 35L/min, the total grouting pressure is not less than 2-3 times of the maximum hydrostatic pressure of the aquifer to be grouted, and the total grouting pressure stabilizing time is more than 30 min.
According to the method provided by the embodiment of the invention, the medium-low density slurry grouting process is adopted, the grouting ending standard in the grouting operation is strictly executed, the stratum can be more sufficiently reinforced, and the diffusion range of grouting slurry is enlarged.
Further, in step 130, determining a slurry diffusion range of the Ordovician limestone karst aquifer after grouting operation according to the number and the position of the rock debris containing the target mineral in the collected rock debris.
In the embodiment of the invention, according to the quantity and the position of the rock debris containing the target mineral in the collected rock debris, by analyzing whether calcium hydroxide is contained in the returned rock debris of the sampling test branch drill hole at the periphery of the grouting test branch drill hole and the quantity and the distribution range of the calcium hydroxide, if the collected rock debris aims at the rock debris collected in the first sampling test branch drill hole and the second sampling test branch drill hole in the horizontal direction of the austempered limestone-soluble aquifer, XRD test analysis is carried out on the collected rock debris, and if the rock debris containing the target mineral is detected to be less or not, then the sampling test analysis is not carried out on the corresponding area in the third sampling test branch drill hole and the fourth sampling test branch drill hole subsequently. At this time, the slurry diffusion range of the horizontal complete rock interval and the formation rock interval area of the limestone-soluble aquifer grouting slurry can be finally determined according to the first sub-interval.
If the data point quantity of the rock debris data containing the target mineral is detected to be more, the sampling test analysis is considered to be carried out in the corresponding areas of the remote sampling branch hole, namely the third sampling test branch drilling hole and the fourth sampling test branch drilling hole. And finally determining the slurry diffusion range of the grouting slurry of the limestone-soluble aquifer in the horizontal direction of the complete rock stratum section and the formation section area according to the first sub-interval and the second sub-interval.
Similarly, for the rock debris collected in the fifth sampling test branch drilling hole and the sixth sampling test branch drilling hole in the vertical direction of the Ordovician limestone karst aquifer, whether the returned rock debris of the sampling test branch drilling holes contains calcium hydroxide and the quantity and the distribution range of the calcium hydroxide are tested and analyzed, and the slurry diffusion range of the grouting slurry of the Ordovician limestone karst aquifer in the complete rock interval and the tectonic rock interval in the vertical direction can be finally determined according to the third sub-interval and the fourth sub-interval.
The method for detecting the diffusion range of the grout in the Ordovician limestone soluble aquifer provided by the embodiment of the invention comprises the steps of detecting target minerals for distinguishing rock debris samples of the Ordovician limestone soluble aquifer and rock masses of grouting materials under different structural conditions in a treatment area by adopting a 'detection-injection-detection' integrated method, detecting the back-discharge rock debris in test branch drill holes arranged around after grouting operation is completed in grouting test branch drill holes by taking the target minerals as tracer objects, determining the diffusion range of the grout in the Ordovician limestone soluble aquifer by detecting the number and the positions of the rock debris containing the target minerals, completing grouting reinforcement treatment on the stratum covered by the test branch holes in the treatment area while testing and analyzing, and avoiding other preparation and implementation work in the treatment field.
Optionally, in step 120, collecting rock cuttings in the target sampling interval of each sample testing lateral borehole, comprising:
respectively determining first sampling intervals of complete rock stratum areas in a first sampling test branch drilling hole, a second sampling test branch drilling hole, a third sampling test branch drilling hole and a fourth sampling test branch drilling hole according to the first grouting position;
according to the second grouting position, respectively determining second sampling intervals of the structural rock stratum region in the first sampling test branch drilling hole, the second sampling test branch drilling hole, the third sampling test branch drilling hole and the fourth sampling test branch drilling hole;
collecting rock debris in a first sampling interval and a second sampling interval in the first sampling test branch drilling hole and collecting rock debris in the first sampling interval and the second sampling interval in the second sampling test branch drilling hole according to a preset sampling interval;
under the condition that the first quantity and the second quantity are determined to exceed the preset quantity threshold value, rock debris in a first sampling interval in the third sampling test branch drilling hole and the fourth sampling test branch drilling hole is collected according to a preset sampling interval, otherwise, the rock debris in the first sampling interval in the third sampling test branch drilling hole and the fourth sampling test branch drilling hole is not collected;
the first quantity is the quantity of the rock debris containing the target mineral collected in the first sampling interval of the first sampling test branch drilling; the second quantity is the quantity of the rock debris containing the target mineral collected in the first sampling interval of the second sampling test branch drilling;
under the condition that the third quantity and the fourth quantity are determined to exceed the preset quantity threshold value, rock debris in a second sampling interval in the third sampling test branch drill hole and the fourth sampling test branch drill hole is collected according to a preset sampling interval, otherwise, the rock debris in the second sampling interval in the third sampling test branch drill hole and the fourth sampling test branch drill hole are not collected;
the third quantity is the quantity of the rock debris containing the target mineral collected in the second sampling interval of the first sampling test branch drilling hole; the fourth quantity is the quantity of the rock debris containing the target mineral collected in the second sampling interval of the second sampling test branch drill hole;
the target sampling interval includes a first sampling interval and a second sampling interval.
Specifically, the first grouting location described in the embodiments of the present invention refers to a grouting location in a complete formation section region in a grouting test branch borehole.
The second grouting location described in embodiments of the present invention refers to a grouting location in a zone of a formation section in a grouting test branch borehole.
The preset sampling interval described in the embodiment of the present invention refers to a preset distance interval for sampling in the target sampling interval of each sampling test branch drill hole, and may be set to 4m, that is, the rock debris is taken once at an interval of 4m in the target sampling interval of each sampling test branch drill hole.
The preset number threshold described in the embodiment of the present invention may be specifically set according to the sampling number in the sampling interval, for example, a value of the preset number threshold is 80% of the sampling number in the sampling interval. For example, if the number of samples in the sampling interval is 15, the preset number threshold may be 12.
Fig. 4 is a second schematic view of the plane arrangement of the branch drill holes in the method for detecting the diffusion range of the grout in the aqueous layer of the austempered limestone, and as shown in fig. 4, a first sampling test branch drill hole (2) and a second sampling test branch drill hole (3) adjacent to the grouting test branch drill hole (1) are preferentially constructed after grouting is finished. Centering on the first grouting position L1 and the second grouting position L2, a first sampling interval of the complete rock interval in the first sampling test branch borehole (2) may be an interval of (L1-50m, and L1+ 50m), and a second sampling interval of the tectonic rock interval in the first sampling test branch borehole (2) may be an interval of (L2-60m, and L2+ 60m). Samples were taken at intervals of 4 m. In the actual drilling process, the returned rock debris can be sampled once every 2m, and in order to ensure the uniformity of the sample, each sampling sample takes one part of two original rock debris samples in 4m respectively to be mixed into a test sample.
Further, by carrying out XRD test analysis on the collected rock debris samples, under the condition that the first quantity and the second quantity are determined to exceed a preset quantity threshold value, collecting rock debris in a first sampling interval in a third sampling test branch drilling hole (4) and a fourth sampling test branch drilling hole (5) according to a preset sampling interval, otherwise, not collecting the rock debris in the first sampling interval in the third sampling test branch drilling hole and the fourth sampling test branch drilling hole, specifically, if the calcium hydroxide data of a target mineral are detected to be less or not, determining that the first quantity and the second quantity do not exceed the preset quantity threshold value, and then subsequently, carrying out sampling test analysis on the sampling intervals corresponding to the third sampling test branch drilling hole (4) and the fourth sampling test branch drilling hole (5) no longer.
If the target mineral calcium hydroxide is detected in the samples of the sampling intervals of the first sampling test branch drilling hole (2) and the second sampling test branch drilling hole (3), and the data points are more in quantity, and the first quantity and the second quantity are determined to exceed the preset quantity threshold value, the sampling test analysis is carried out on the sampling intervals corresponding to the remote sampling branch drilling holes, namely the third sampling test branch drilling hole (4) and the fourth sampling test branch drilling hole (5).
Similarly, according to the construction method, under the condition that the third quantity and the fourth quantity are determined to exceed the preset quantity threshold value, rock debris in a second sampling interval in the third sampling test branch drill hole (4) and the fourth sampling test branch drill hole (5) is collected according to the preset sampling interval, otherwise, the rock debris in the second sampling interval in the third sampling test branch drill hole (4) and the fourth sampling test branch drill hole (5) is not collected.
With reference to fig. 4, after the rock debris sampling and testing of the first sampling test branch drill hole (2) and the second sampling test branch drill hole (3) are completed, the third sampling test branch drill hole (4) and the fourth sampling test branch drill hole (5) are constructed, and similarly, with the first grouting position L1 and the second grouting position L2 as centers, the first sampling interval in the complete rock interval in the third sampling test branch drill hole (4) may be an interval of (L1-40m, L1+ 40m), and the second sampling interval in the structural rock interval in the third sampling test branch drill hole (4) may be an interval of (L2-50m, L2+ 50m). Likewise, the sampling intervals and patterns are the same as those of the sampling test branch boreholes (2) and (3). And after the collection of the samples is finished, performing XRD test analysis on the samples, and counting the quantity and the positions of the target minerals such as calcium hydroxide. And finally determining the slurry diffusion range of the cement-based slurry in the complete rock interval and the structural rock interval through analyzing all the test results.
According to the method provided by the embodiment of the invention, the construction and sampling are carried out according to the sequence from near to far, and the construction of the long-distance sampling test branch drill hole is determined based on the detection of the rock debris sample in the short-distance sampling test branch drill hole, so that the construction process is simple and convenient, and the construction efficiency of the slurry diffusion range detection in the horizontal direction of the Ordovician limestone water-bearing stratum is favorably improved.
Optionally, in step 120, collecting rock debris in the target sampling interval of each sampling test branch borehole, further comprising:
respectively determining a third sampling interval of the complete rock stratum section area in a fifth sampling test branch drilling hole and a sixth sampling test branch drilling hole according to the first grouting position;
according to the second grouting position, respectively determining fourth sampling intervals of the structural rock stratum section area in the fifth sampling test branch drilling hole and the sixth sampling test branch drilling hole;
collecting rock debris in a third sampling interval and a fourth sampling interval in a fifth sampling test branch drill hole according to a preset sampling interval;
collecting rock debris in a third sampling interval in the sixth sampling test branch drill hole according to a preset sampling interval under the condition that the ninth quantity is determined to exceed a preset quantity threshold, otherwise, not collecting the rock debris in the third sampling interval in the sixth sampling test branch drill hole; the ninth quantity is the quantity of the rock fragments containing the target minerals collected in the third sampling interval of the fifth sampling test branch drill hole;
collecting rock debris in a fourth sampling interval in the sixth sampling test branch drill hole according to a preset sampling interval under the condition that the tenth quantity is determined to exceed a preset quantity threshold, otherwise, not collecting the rock debris in the fourth sampling interval in the sixth sampling test branch drill hole; the tenth quantity is the quantity of the rock debris containing the target mineral collected in the fourth sampling interval of the fifth sampling test branch drill hole;
the target sampling interval includes a third sampling interval and a fourth sampling interval.
Fig. 5 is a second schematic view of vertical layering arrangement of branch drill holes in the method for detecting diffusion range of slurry in an aqueous layer of an ohalite solution, as shown in fig. 5, a fifth sampling test branch drill hole (6) adjacent to the grouting test branch drill hole (1) is preferentially constructed in the vertical direction of the grouting test branch drill hole (1) after grouting is finished. With the first grouting position L1 and the second grouting position L2 as centers, the third sampling interval in the complete rock interval in the fifth sampling test branch drill hole (6) can be an interval of (L1-50m, L1+ 50m), and the fourth sampling interval in the structural rock interval in the fifth sampling test branch drill hole (6) can be an interval of (L2-60m, L2+ 60m). Similarly, rock cuttings were sampled at 4m intervals in the target sampling interval.
Further, by carrying out XRD test analysis on the collected rock debris samples, under the condition that the ninth quantity is determined to exceed a preset quantity threshold value, collecting rock debris in a third sampling interval in a sixth sampling test branch drill hole (7) according to a preset sampling interval, otherwise, not collecting the rock debris in the third sampling interval in the sixth sampling test branch drill hole (7), specifically, if the calcium hydroxide data of the target mineral is detected to be less or not, determining that the quantity of the rock debris containing the target mineral collected in the third sampling interval of the fifth sampling test branch drill hole (6) does not exceed the preset quantity threshold value, and then subsequently, not carrying out sampling test analysis on the rock debris corresponding to the sixth sampling test branch drill hole (7).
Similarly, according to the construction method, under the condition that the tenth quantity is determined to exceed the preset quantity threshold value, rock debris in a fourth sampling interval in the sixth sampling test branch drill hole (7) is collected according to a preset sampling interval, otherwise, the rock debris in the fourth sampling interval in the sixth sampling test branch drill hole (7) is not collected.
If the target mineral calcium hydroxide is detected in the samples of each sampling interval of the fifth sampling test branch drill hole (6), the quantity of data points is large, and the ninth quantity is determined to exceed the preset quantity threshold value, the sampling test analysis is considered to be carried out in the sampling interval corresponding to the sixth sampling test branch drill hole (7) which is a remote sampling branch hole.
With continued reference to fig. 5, after the rock debris sampling and testing of the fifth sampling test branch drill hole (6) is completed, the sixth sampling test branch drill hole (7) is constructed, and similarly, the first grouting position L1 and the second grouting position L2 are taken as centers, the third sampling interval in the complete rock interval in the sixth sampling test branch drill hole (7) can be an interval of (L1-40m, L1+ 40m), and the fourth sampling interval in the tectonic rock interval in the sixth sampling test branch drill hole (7) can be an interval of (L2-50m, L2+ 50m). Likewise, the sampling intervals and pattern are the same as those of the fifth sample trial branch borehole (6). And after the collection of the samples is finished, carrying out XRD test analysis on each sample, and counting to obtain the quantity and the position of the target mineral such as calcium hydroxide. And finally determining the slurry diffusion range of the cement-based slurry in the vertical direction of the complete rock interval and the structural rock interval through analyzing all the test results.
According to the method provided by the embodiment of the invention, the construction and sampling are carried out according to the sequence from near to far, the construction of the remote sampling test branch drill hole is determined based on the detection of the rock debris sample in the short-distance sampling test branch drill hole, the construction process is simple and convenient, and the construction efficiency of the slurry diffusion range detection in the vertical direction of the Ordovician limestone solution aquifer is favorably improved.
Optionally, in step 130, determining a slurry diffusion range of the austempered limestone karst aquifer after grouting operation according to the number and the position of the rock debris containing the target mineral in the statistically collected rock debris, including:
determining a first slurry diffusion range in the horizontal direction after grouting operation is performed on the Ordovician limestone solution aquifer according to the counted number of rock debris containing target minerals in each sampling test branch drilling hole in the horizontal direction of the complete rock stratum region and the tectonic rock stratum region;
determining a second slurry diffusion range in the vertical direction after grouting operation is carried out on the Ordovician limestone karst aquifer according to the counted number of rock debris containing target minerals in each sampling test branch drilling hole in the vertical direction of the complete rock stratum region and the tectonic rock stratum region;
and determining the slurry diffusion range of the Ordovician limestone water-containing layer after grouting operation according to the first slurry diffusion range and the second slurry diffusion range.
According to the method provided by the embodiment of the invention, the slurry diffusion conditions of the complete rock stratum region and the tectonic rock stratum region in the Ordovician limestone soluble aquifer are detected from multiple directions by considering the slurry diffusion ranges of the complete rock stratum region and the tectonic rock stratum region in the horizontal direction and the vertical direction after the Ordovician limestone soluble aquifer is subjected to grouting operation, so that the accuracy of the detection result of the slurry diffusion range of the Ordovician limestone soluble aquifer is favorably improved.
Optionally, determining a first slurry diffusion range in the horizontal direction after grouting operation is performed on the austempered limestone karst aquifer according to the counted number of rock debris containing target minerals in each sampling test branch drilling hole in the horizontal direction of the complete rock stratum region and the structural rock stratum region, and the method includes:
determining a slurry diffusion range in the horizontal direction of the complete rock stratum area after grouting operation is carried out on the Ordovician limestone water-soluble aquifer according to the first sub-interval under the condition that the first quantity and the second quantity are both smaller than a preset quantity threshold;
or determining the slurry diffusion range of the Ordovician limestone water-soluble aquifer in the horizontal direction of the complete rock stratum section area after grouting operation is carried out on the Ordovician limestone water-soluble aquifer based on the first sub-interval and the second sub-interval under the condition that the first quantity and the second quantity both exceed the preset quantity threshold and the fifth quantity and the sixth quantity are both smaller than the preset quantity threshold;
the fifth quantity is the quantity of the rock debris containing the target mineral collected in the first sampling interval of the third sampling test branch drill hole; the sixth quantity is the quantity of the rock debris containing the target mineral collected in the first sampling interval of the fourth sampling test branch drill hole;
under the condition that the third quantity and the fourth quantity are smaller than the preset quantity threshold value, determining a slurry diffusion range in the horizontal direction of the tectonic rock stratum area after grouting operation is carried out on the Ordovician limestone water-soluble aquifer according to the first sub-interval;
or determining the slurry diffusion range in the horizontal direction of the tectonic rock stratum section area after grouting operation of the Ordovician limestone-soluble aquifer based on the first sub-interval and the second sub-interval under the condition that the third quantity and the fourth quantity are both greater than the preset quantity threshold value and the seventh quantity and the eighth quantity are both smaller than the preset quantity threshold value;
the seventh quantity is the quantity of the rock debris containing the target mineral collected in the second sampling interval of the third sampling test branch drill hole; the eighth quantity is the quantity of the rock debris containing the target mineral collected in the second sampling interval of the fourth sampling test branch drill hole;
the first slurry diffusion range comprises a slurry diffusion range in the horizontal direction of the tectonic rock segment area after grouting operation is performed on the Ordovician limestone-soluble aquifer and a slurry diffusion range in the horizontal direction of the tectonic rock segment area after grouting operation is performed on the Ordovician limestone-soluble aquifer.
Specifically, in the embodiment of the present invention, under the condition that it is determined that both the first quantity and the second quantity are smaller than the preset quantity threshold, the slurry diffusion range in the horizontal direction of the complete rock stratum region after the grouting operation of the ohyolite-soluble aquifer is determined according to the first sub-interval. With continued reference to fig. 4, in the case where the number of rock fragments containing the target mineral is collected in the first sampling interval (L1-50m, L1+ 50m) of the first sampling test branch drill hole (2) and the number of rock fragments containing the target mineral is collected in the first sampling interval (L1-50m, L1+ 50m) of the second sampling test branch drill hole (3) are both smaller than the preset number threshold, the slurry diffusion range in the horizontal direction of the complete rock segment region after grouting operation of the ohmite solution water-bearing layer is determined to be (0, R1) according to the first subspaces R1.
And if the fifth quantity and the sixth quantity are determined to exceed the preset quantity threshold value, namely the quantity of the rock debris containing the target mineral is acquired in the first sampling interval (L1-40m, L1+ 40m) of the third sampling test branch drill hole (4) and the quantity of the rock debris containing the target mineral is acquired in the first sampling interval (L1-40m, L1+ 40m) of the fourth sampling test branch drill hole (5) is less than the preset quantity threshold value, determining the slurry diffusion range (R1, R1+ R2) in the horizontal direction of the complete rock stratum section area after the grouting operation of the Ordovician limestone karst aquifer based on the first subspan R1 and the second subspan R1+ R2.
Likewise, in the same manner as described above, in the case where the third number and the fourth number, that is, the number of the cuttings containing the target mineral collected in the second sampling interval (L2-60m, L2+ 60m) of the first sampling test branch drill hole (2) and the number of the cuttings containing the target mineral collected in the second sampling interval (L2-60m, L2+ 60m) of the second sampling test branch drill hole (3) are both smaller than the preset number threshold value, the slurry diffusion range (0, R1) in the horizontal direction of the formation section area after the grouting operation of the austempered limestone karst aquifer is determined based on the first sub-interval R1.
And determining the slurry diffusion range in the horizontal direction of the formation section area after grouting operation of the Ordovician limestone water-bearing stratum based on the first subspan R1 and the second subspan R1+ R2 as (R1, R1+ R2) under the condition that the third quantity and the fourth quantity both exceed the preset quantity threshold value, and the seventh quantity and the eighth quantity, namely the quantity of the rock debris containing the target mineral collected in the second sampling interval (L2-50m, L2+ 50m) of the third sampling test branched drill hole (4) and the quantity of the rock debris containing the target mineral collected in the second sampling interval (L2-50m, L2+ 50m) of the fourth sampling test branched drill hole (5) are both smaller than the preset quantity threshold value.
Therefore, the first slurry diffusion range in the horizontal direction after the grouting operation of the ohyolite-soluble aquifer can be determined based on the slurry diffusion range in the horizontal direction of the formation section region after the grouting operation of the ohyolite-soluble aquifer and the slurry diffusion range in the horizontal direction of the formation section region after the grouting operation of the ohyolite-soluble aquifer.
According to the method provided by the embodiment of the invention, rock debris samples are sampled from the sampling test branch drill holes at different distances in the horizontal direction from the grouting test branch drill hole, the quantity and the position of rock debris containing target minerals are analyzed, and the diffusion ranges of the grout under the complete rock interval and the tectonic rock interval in the horizontal direction of the Ordovician limestone karst aquifer are detected, so that the detection accuracy of the diffusion ranges of the grout under different geological conditions in the horizontal direction of the Ordovician limestone karst aquifer can be improved, meanwhile, the whole detection method is simple to operate, the cost is saved, and the economy and the timeliness are improved.
Optionally, determining a second slurry diffusion range in the vertical direction after grouting operation is performed on the austenitizing aquifer according to the counted number of rock debris containing target minerals in each sampling test branch borehole in the vertical direction of the complete rock stratum region and the tectonic rock stratum region, and the second slurry diffusion range comprises:
determining the slurry diffusion range in the vertical direction of the complete rock stratum area after grouting operation is performed on the Ordovician limestone-soluble aquifer according to the third sub-interval under the condition that the ninth quantity is smaller than the preset quantity threshold;
or determining the slurry diffusion range in the vertical direction of the complete rock stratum section area after grouting operation of the Ordovician limestone solution aquifer based on the third sub-interval and the fourth sub-interval under the condition that the ninth quantity is determined to exceed the preset quantity threshold and the eleventh quantity is determined to be smaller than the preset quantity threshold;
the eleventh quantity is the quantity of the rock debris containing the target mineral collected in the third sampling interval of the sixth sampling test branch drill hole;
determining the slurry diffusion range of the Ordovician limestone water-soluble stratum in the vertical direction of the tectonic rock stratum area after grouting operation according to the third sub-interval under the condition that the tenth quantity is smaller than the preset quantity threshold;
or under the condition that the tenth quantity is determined to exceed the preset quantity threshold value and the twelfth quantity is determined to be smaller than the preset quantity threshold value, determining the slurry diffusion range in the vertical direction of the formation section area after grouting operation is carried out on the Ordovician limestone water-bearing stratum based on the third sub-interval and the fourth sub-interval;
the twelfth quantity is the quantity of the rock debris containing the target mineral collected in the fourth sampling interval of the sixth sampling test branch drill hole;
the second slurry diffusion range comprises a slurry diffusion range in the vertical direction of the tectonic rock segment area after the Ordovician limestone-soluble aquifer is subjected to grouting operation and a slurry diffusion range in the vertical direction of the tectonic rock segment area after the Ordovician limestone-soluble aquifer is subjected to grouting operation.
Specifically, in the embodiment of the invention, under the condition that the ninth number, namely the number of the rock debris containing the target minerals collected in the third sampling interval of the fifth sampling test branch drill hole (6) is less than the preset number threshold, the slurry diffusion range in the vertical direction of the complete rock stratum area after the grouting operation of the Ordovician limestone water-bearing layer is determined according to the third sub-interval. With continued reference to fig. 5, in the case where the number of the rock debris containing the target mineral is collected in the third sampling interval (L1-50m, L1+ 50m) of the statistical fifth sampling test branch drill hole (6) and is smaller than the preset number threshold, the slurry diffusion range in the vertical direction of the complete rock stratum area after grouting operation of the austempered limestone-soluble aquifer is determined to be (0, R1) according to the first sub-interval R1.
And if the number of the rock fragments containing the target mineral is less than the preset number threshold value in the third sampling interval (L1-40m, L1+ 40m) of the eleventh sampling test branch drilling hole (7), namely the eleventh sampling interval (L1-40m, L1+ 40m), determining the slurry diffusion range (R1, R1+ R2) in the vertical direction of the complete rock stratum area after grouting operation of the Ordovician limestone solution aquifer based on the first subspaces R1 and the second subspaces R1+ R2.
Similarly, in the same manner as described above, in the case where it is determined that the tenth number, that is, the number of rock fragments containing the target mineral, collected in the fourth sampling interval (L2-60m, L2+ 60m) of the fifth sampling test branch drill (6) is less than the preset number threshold value, the slurry diffusion range (0, R1) in the vertical direction of the formation section region after the grouting operation of the ohlite-soluble aquifer is determined based on the third subspan R1.
And in the case that the tenth quantity is determined to exceed the preset quantity threshold value, and the twelfth quantity, namely the quantity of the rock debris containing the target mineral collected in the fourth sampling interval (L2-50m, L2+ 50m) of the sixth sampling test branch drill hole (7) is less than the preset quantity threshold value, determining the slurry diffusion range in the horizontal direction of the formation section area after grouting operation of the Ordovician limestone karst aquifer to be (R1, R1+ R2) based on the third subspaces R1 and the fourth subspaces R1+ R2.
Therefore, the second slurry diffusion in the vertical direction after the grouting operation of the ohyolite-soluble aquifer can be determined based on the slurry diffusion range in the vertical direction of the zone of the formation after the grouting operation of the ohyolite-soluble aquifer and the slurry diffusion range in the vertical direction of the zone of the formation after the grouting operation of the ohyolite-soluble aquifer.
According to the method provided by the embodiment of the invention, rock debris samples are sampled from the sampling test branch drill holes with different distances in the vertical direction from the grouting test branch drill hole, the quantity and the position of rock debris containing target minerals are analyzed, and the slurry diffusion ranges of the Ordovician limestone karst aquifer under the complete rock layer section and the tectonic rock layer section in the vertical direction are detected, so that the accuracy of slurry diffusion range detection under different geological conditions in the Ordovician limestone karst aquifer vertical direction can be improved, meanwhile, the whole detection method is simple to operate, the cost is saved, and the economy and the timeliness are improved.
Through the above description of the embodiments, those skilled in the art will clearly understand that each embodiment may be implemented by software plus a necessary general hardware platform, and may also be implemented by hardware. With this understanding in mind, the above-described technical solutions may be embodied in the form of a software product, which can be stored in a computer-readable storage medium such as ROM/RAM, magnetic disk, optical disk, etc., and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the methods described in the embodiments or some parts of the embodiments.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. The method for detecting the diffusion range of the slurry of the Ordovician limestone soluble aquifer is characterized by comprising the following steps of:
arranging a grouting test branch drill hole in an Ordovician limestone water-bearing stratum in a target treatment area, symmetrically arranging an even number of sampling test branch drill holes in the horizontal direction of the grouting test branch drill holes according to a first interval by taking the grouting test branch drill holes as a reference, and arranging a plurality of sampling test branch drill holes in the lower part of the grouting test branch drill holes in the vertical direction according to a second interval by taking the grouting test branch drill holes as a base line;
after grouting operation is completed on the grouting position in the grouting test branch drill hole, rock debris in a target sampling interval of each sampling test branch drill hole is collected so as to perform mineral analysis on each rock debris; the target sampling interval is set based on the grouting position;
determining the slurry diffusion range of the Ordovician limestone water-bearing stratum after grouting operation according to the number and the position of the rock debris containing the target minerals in the statistically collected rock debris; the target mineral is determined by comparing and analyzing the rock debris sample of the Ordovician limestone solution aquifer with the rock consolidation body of the grouting material used in the target treatment area.
2. The method for detecting the diffusion range of the grout in the Ordovician limestone-soluble aquifer according to claim 1, wherein the grouting test branch drill hole penetrates through a complete rock stratum section area and a tectonic rock stratum section area in the Ordovician limestone-soluble aquifer; the grouting locations include a first grouting location in the full formation section area and a second grouting location in the formation section area.
3. The method for detecting the diffusion range of the grout in the Ordovician limestone karst aquifer according to claim 2, wherein the step of determining the diffusion range of the grout after the grouting operation of the Ordovician limestone karst aquifer according to the number and the position of the rock fragments containing the target mineral in the statistically collected rock fragments comprises the following steps:
determining a first slurry diffusion range of the Ordovician limestone water-soluble stratum in the horizontal direction after grouting operation according to the counted number of rock debris containing the target mineral in each sampling test branch drilling hole in the horizontal direction of the complete rock stratum region and the tectonic rock stratum region;
determining a second slurry diffusion range in the vertical direction after grouting operation is performed on the Ordovician limestone karst aquifer according to the counted number of rock fragments containing the target mineral in each sampling test branch drilling hole in the vertical direction of the complete rock stratum region and the tectonic rock stratum region;
and determining the slurry diffusion range of the Ordovician limestone water-containing layer after grouting operation according to the first slurry diffusion range and the second slurry diffusion range.
4. The method for detecting the diffusion range of the Ordovician soluble aquifer slurry according to claim 3, wherein the first interval comprises a first sub-interval and a second sub-interval; the even number of sampling test branch drill holes comprise a first sampling test branch drill hole, a second sampling test branch drill hole, a third sampling test branch drill hole and a fourth sampling test branch drill hole; with slip casting test branch drilling is the baseline, according to first interval in slip casting test branch drilling's horizontal direction symmetrical arrangement even number sampling test branch drilling includes:
taking the grouting test branch drill hole as a base line, symmetrically arranging the first sampling test branch drill hole and the second sampling test branch drill hole in the horizontal direction of the grouting test branch drill hole according to a first sub-interval, and symmetrically arranging the third sampling test branch drill hole and the fourth sampling test branch drill hole in the horizontal direction of the grouting test branch drill hole according to a second sub-interval; the value range of the first sub-interval is 20-25 meters; the value range of the second sub-interval is 45 meters to 55 meters.
5. The method for detecting the diffusion range of the Ordovician aquifer slurry according to claim 4, wherein the step of collecting rock debris in the target sampling interval of each sampling test branch drill hole comprises the following steps:
respectively determining first sampling intervals of the complete formation section areas in the first sampling test branch drilling hole, the second sampling test branch drilling hole, the third sampling test branch drilling hole and the fourth sampling test branch drilling hole according to the first grouting position;
according to the second grouting position, respectively determining second sampling intervals of the tectonic rock stratum zone areas in the first sampling test branch drilling hole, the second sampling test branch drilling hole, the third sampling test branch drilling hole and the fourth sampling test branch drilling hole;
collecting rock debris in the first sampling interval and the second sampling interval in the first sampling test branch drill hole and collecting rock debris in the first sampling interval and the second sampling interval in the second sampling test branch drill hole according to a preset sampling interval;
under the condition that the first quantity and the second quantity are determined to exceed a preset quantity threshold value, collecting rock debris in the first sampling interval in the third sampling test branch drilling hole and the fourth sampling test branch drilling hole according to the preset sampling interval, otherwise, not collecting the rock debris in the first sampling interval in the third sampling test branch drilling hole and the fourth sampling test branch drilling hole;
the first quantity is the quantity of rock fragments containing the target mineral collected in a first sampling interval of the first sampling test branch drill hole; the second quantity is the quantity of the rock fragments containing the target mineral collected in the first sampling interval of the second sampling test branch drilling;
under the condition that the third quantity and the fourth quantity are determined to exceed the preset quantity threshold value, collecting rock debris in the second sampling interval in the third sampling test branch drill hole and the fourth sampling test branch drill hole according to the preset sampling interval, otherwise, not collecting the rock debris in the second sampling interval in the third sampling test branch drill hole and the fourth sampling test branch drill hole;
the third quantity is the quantity of the rock debris containing the target mineral collected in the second sampling interval of the first sampling test branch drill hole; the fourth quantity is the quantity of the rock debris containing the target mineral collected in the second sampling interval of the second sampling test branch drill hole;
the target sampling interval includes the first sampling interval and the second sampling interval.
6. The method for detecting the grout diffusion range of the Ordovician limestone karst aquifer according to claim 5, wherein the step of determining the first grout diffusion range in the horizontal direction after the grouting operation of the Ordovician limestone karst aquifer according to the statistics of the number of rock fragments containing the target mineral in each sampling test branch drilling hole in the horizontal direction of the complete rock stratum section area and the tectonic rock stratum section area comprises the following steps:
determining the diffusion range of the slurry in the horizontal direction of the complete rock stratum area after grouting operation of the Ordovician limestone-soluble aquifer according to the first sub-interval under the condition that the first quantity and the second quantity are smaller than the preset quantity threshold;
or, under the condition that the first quantity and the second quantity are both determined to exceed the preset quantity threshold value, and the fifth quantity and the sixth quantity are both determined to be smaller than the preset quantity threshold value, determining the slurry diffusion range in the horizontal direction of the complete rock stratum section area after the Ordovician limestone soluble aquifer performs the grouting operation based on the first sub-interval and the second sub-interval;
the fifth quantity is the quantity of the rock debris containing the target mineral collected in the first sampling interval of the third sampling test branch drill hole; the sixth number is the number of rock fragments containing the target mineral collected in the first sampling interval of the fourth sampling test branch drill hole;
determining a slurry diffusion range in the horizontal direction of the tectonic rock stratum area after grouting operation is performed on the Ordovician limestone-soluble aquifer according to the first sub-interval under the condition that the third quantity and the fourth quantity are smaller than the preset quantity threshold;
or, under the condition that the third quantity and the fourth quantity are both determined to exceed the preset quantity threshold value, and the seventh quantity and the eighth quantity are both determined to be smaller than the preset quantity threshold value, determining the slurry diffusion range in the horizontal direction of the tectonic rock stratum section area after the grouting operation of the Ordovician limestone-soluble aquifer based on the first sub-interval and the second sub-interval;
the seventh quantity is the quantity of the rock debris containing the target mineral collected in the second sampling interval of the third sampling test branch drill hole; the eighth quantity is the quantity of the rock debris containing the target mineral collected in the second sampling interval of the fourth sampling test branch drill hole;
the first slurry diffusion range comprises a slurry diffusion range of the Ordovician limestone water-bearing layer in the horizontal direction of the tectonic rock stratum area after grouting operation and a slurry diffusion range of the Ordovician limestone water-bearing layer in the horizontal direction of the tectonic rock stratum area after grouting operation.
7. The Ordovician soluble aquifer slurry diffusion range detection method of claim 3, wherein the second spacing comprises a third sub-spacing and a fourth sub-spacing; the plurality of sample test branch boreholes comprise a fifth sample test branch borehole and a sixth sample test branch borehole; the many sampling test branch drilling uses slip casting test branch drilling is the baseline, according to the second interval in slip casting test branch drilling's the lower part of the vertical direction arranges many sampling test branch drilling, includes:
taking the grouting test branch drill hole as a base line, arranging the fifth sampling test branch drill hole in the vertical direction of the grouting test branch drill hole according to a third sub-interval, and arranging the sixth sampling test branch drill hole in the vertical direction of the grouting test branch drill hole according to a fourth sub-interval; the value range of the third sub-interval is 15 meters to 20 meters; the value range of the fourth sub-interval is 35 meters to 45 meters.
8. The method for detecting the diffusion range of the slurry in the ohalite-soluble aquifer according to claim 7, wherein the step of collecting rock debris in the target sampling interval of each sampling test branch drill hole comprises the following steps:
respectively determining a third sampling interval of the complete formation section area in the fifth sampling test branch drilling hole and the sixth sampling test branch drilling hole according to the first grouting position;
according to the second grouting position, respectively determining fourth sampling intervals of the tectonic rock stratum section area in the fifth sampling test branch drilling hole and the sixth sampling test branch drilling hole;
collecting rock debris in the third sampling interval and the fourth sampling interval in the fifth sampling test branch drill hole according to a preset sampling interval;
collecting rock debris in the third sampling interval in the sixth sampling test branch drill hole according to the preset sampling interval under the condition that the ninth quantity is determined to exceed the preset quantity threshold, otherwise, not collecting the rock debris in the third sampling interval in the sixth sampling test branch drill hole; the ninth quantity is the quantity of the rock debris containing the target mineral collected in the third sampling interval of the fifth sampling test branch drill hole;
collecting rock debris in the fourth sampling interval in the sixth sampling test branch drill hole according to the preset sampling interval under the condition that the tenth quantity is determined to exceed the preset quantity threshold, otherwise, not collecting the rock debris in the fourth sampling interval in the sixth sampling test branch drill hole; the tenth number is the number of rock fragments containing the target mineral collected in the fourth sampling interval of the fifth sampling test branch drill hole;
the target sampling interval includes the third sampling interval and the fourth sampling interval.
9. The method for detecting the slurry diffusion range of the Ordovician limestone karst aquifer according to claim 8, wherein the step of determining the second slurry diffusion range in the vertical direction after the grouting operation of the Ordovician limestone karst aquifer is performed according to the statistics of the number of the rock fragments containing the target mineral in each of the sampling test branch drill holes in the vertical direction of the complete rock stratum region and the tectonic rock stratum region comprises the following steps:
determining the slurry diffusion range in the vertical direction of the complete rock stratum area after grouting operation is performed on the Ordovician limestone-soluble aquifer according to the third sub-interval under the condition that the ninth quantity is smaller than the preset quantity threshold;
or, under the condition that the ninth quantity is determined to exceed the preset quantity threshold value and the eleventh quantity is determined to be smaller than the preset quantity threshold value, determining a slurry diffusion range in the vertical direction of the complete rock stratum section area after the grouting operation of the Ordovician limestone solution aquifer based on the third sub-interval and the fourth sub-interval;
the eleventh quantity is the quantity of the rock debris containing the target mineral collected in the third sampling interval of the sixth sampling test branch drill hole;
determining a slurry diffusion range in the vertical direction of the tectonic rock segment area after the Ordovician limestone water-soluble stratum is subjected to grouting operation according to the third sub-interval under the condition that the tenth quantity is smaller than the preset quantity threshold;
or, under the condition that the tenth quantity is determined to exceed the preset quantity threshold value and the twelfth quantity is determined to be smaller than the preset quantity threshold value, determining the slurry diffusion range in the vertical direction of the formation section area after the Ordovician limestone soluble aquifer performs grouting operation based on the third sub-interval and the fourth sub-interval;
the twelfth number is the number of rock fragments containing the target mineral collected in a fourth sampling interval of the sixth sampling test branch drill hole;
the second slurry diffusion range comprises a slurry diffusion range of the Ordovician limestone water-bearing layer in the vertical direction of the tectonic rock stratum area after grouting operation and a slurry diffusion range of the Ordovician limestone water-bearing layer in the vertical direction of the tectonic rock stratum area after grouting operation.
10. The method for detecting the diffusion range of the Ordovician soluble aquifer slurry according to any one of claims 1 to 9, wherein the grouting material used in the target treatment area is a cement-based slurry, and the cement-based slurry is a medium-low density slurry with the density ranging from 1.2kg/L to 1.3 kg/L;
the grouting ending standard in the grouting operation is that the pump capacity of a grouting pump reaches a target pump capacity range, the total grouting pressure meets a target pressure condition, and the stable time of the total grouting pressure reaches a target time range; the target pressure condition is determined based on a maximum hydrostatic pressure of the aquifer being infused.
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| CN117610939B (en) * | 2024-01-18 | 2024-05-07 | 天科院环境科技发展（天津）有限公司 | Port dangerous cargo container yard environment risk assessment method and system |
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