CN115951032A - Groundwater leaching simulation device and method - Google Patents
Groundwater leaching simulation device and method Download PDFInfo
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- CN115951032A CN115951032A CN202211271367.8A CN202211271367A CN115951032A CN 115951032 A CN115951032 A CN 115951032A CN 202211271367 A CN202211271367 A CN 202211271367A CN 115951032 A CN115951032 A CN 115951032A
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Abstract
The application provides an underground water leaching simulation device and method. The device comprises: organic glass tubes with different heights, a rock stratum simulation material, leachate and a peristaltic pump; each organic glass tube is used for placing a rock stratum simulation material with corresponding height; the organic glass tube group obtained by combination is used for simulating an underground rock stratum; the peristaltic pump is connected with the lower end of the organic glass tube group and is used for pumping the leachate from the lower end of the organic glass tube group provided with the rock stratum simulation material to the upper end of the organic glass tube group. The utility model provides a groundwater leaching analogue means utilizes the peristaltic pump to leach the liquid with leaching from supreme down for at least one deck stratum simulation material in the liquid glass nest of tubes is fully passed through to the leaching liquid, effectively realizes the simulation to complicated geological conditions, can also adjust the stratum simulation material in the liquid glass nest of tubes according to actual conditions, alright from the leaching simulation of specific aquifer as leaching starting point, and applicable leaching simulation under different purposes.
Description
Technical Field
The application relates to the technical field of underground water leaching, in particular to an underground water leaching simulation device and method.
Background
Leaching experimental devices and the like used in the current stage for identifying water sources of mine water kick (water inrush) and analyzing hydrological geochemical processes usually ignore the influence of composition change of each rock stratum along the depth and composition characteristic difference of different areas, so that the difference between the chemical reaction type and the reaction degree in the process of a simulation experiment and the real process greatly deviates from the actual situation; on the other hand, in the existing leaching experiments of underground water and the like, the analysis of the underground water permeation process and mechanism by using the content of permeability variation and the like before and after mining of the regional aquifer structure is not considered, so that certain deviation exists in data obtained based on the water chemistry characteristics, and the credibility of the analysis result is reduced.
In addition, the leaching experimental device used at present can only place a single leached medium in a leaching column, cannot simulate a complex geologic body under the superposition effect of multiple layers of media, and cannot simulate from a specific water-bearing layer as a leaching starting point; the leaching liquid and the leaching material used by the leaching device are difficult to adapt to leaching simulation of different purposes, and the experimental reproducibility is poor.
Disclosure of Invention
In view of the above, the present application aims to provide a groundwater leaching simulation device and method.
Based on above-mentioned purpose, this application provides a groundwater leaching analogue means, includes:
organic glass tubes with different heights, a rock stratum simulation material, leachate and a peristaltic pump;
each organic glass tube is used for placing the rock stratum simulation material with a corresponding height;
the organic glass tubes can be combined to obtain an organic glass tube group for simulating an underground rock stratum;
the peristaltic pump is connected with the lower end of the organic glass tube group and is used for pumping the leachate from the lower end of the organic glass tube group provided with the rock stratum simulation material to the upper end of the organic glass tube group.
In a possible implementation manner, the apparatus further includes: a water passing gasket and a nylon wire mesh; the organic glass tube is also provided with an upper threaded port and a lower threaded port;
the water passing gasket and the nylon wire mesh are arranged at the upper threaded port and the lower threaded port of the organic glass pipe, and are used for separating different types of rock stratum simulation materials.
In one possible implementation, the plexiglass tubes can be combined to give a plexiglass tube stack comprising:
in response to the number of the organic glass tubes being one, taking the organic glass tubes as the organic glass tube groups;
and responding to that the number of the organic glass tubes is more than one, and at least two of the organic glass tubes are connected in a threaded manner through the upper threaded port and the lower threaded port to obtain the organic glass tube group.
In one possible implementation mode, a layered sampling port is arranged on the side wall of the organic glass tube;
the layered sampling port is arranged at the lower end of the upper threaded connector of the organic glass pipe and used for obtaining the leachate passing through the rock stratum simulation material in the corresponding organic glass pipe.
Based on the same inventive concept, the embodiment of the present application further provides a groundwater leaching simulation method using the apparatus according to any one of claims 1 to 4, comprising:
selecting the organic glass tube with the corresponding thickness according to the calculated putting thickness of each layer of rock stratum simulation material; combining the organic glass tubes with corresponding thicknesses to obtain an organic glass tube group;
calculating the input quality of each layer of rock stratum simulation material according to the input thickness of each layer of rock stratum simulation material;
according to the placing quality of each layer of rock stratum simulation material, sequentially placing each layer of rock stratum simulation material into an organic glass tube corresponding to the organic glass tube group;
and starting the peristaltic pump, and pumping the leachate from the lower end of the organic glass tube group to the upper end of the organic glass tube group.
In one possible implementation, the input thickness of each layer of formation-simulating material is calculated by:
determining the thickness proportion of each layer of the rock stratum simulation material;
and calculating the thickness of each layer of the rock stratum simulation material according to the thickness proportion and the total thickness of the obtained rock stratum simulation material.
In a possible implementation manner, the calculating the input quality of each layer of rock stratum simulation material according to the input thickness of each layer of rock stratum simulation material includes:
and calculating the dry density of each layer of the rock stratum simulation material, and determining the input quality of each layer of the rock stratum simulation material according to the input thickness and the dry density of each layer of the rock stratum simulation material.
In one possible implementation, the dry density of the formation-simulating material is calculated by:
putting the air-dried rock stratum simulation material into a compaction box for compaction to obtain the volume and the mass of the rock stratum simulation material;
and calculating the dry density of the rock stratum simulation material according to the volume and the mass of the rock stratum simulation material.
In one possible implementation, the method further includes:
and pumping the leachate to the upper end of the organic glass tube group in response to the peristaltic pump, and obtaining leachate passing through different rock stratum simulation materials from different layered sampling ports.
In one possible implementation, the method further includes:
before the leachate is utilized to leach the rock stratum simulation material, circulating distilled water from the lower end of the organic glass pipe to the upper end of the organic glass pipe by using a peristaltic pump within preset time.
From the above, it can be seen that the groundwater leaching simulation device and method provided by the embodiment of the application realize the simulation of complex geologic bodies under the superposition effect of multiple strata by placing multiple strata simulation materials in the organic glass pipe group, and the strata simulation materials in the organic glass pipe group can be increased or decreased according to the actual geological conditions simulated as required, so that the leaching simulation from a specific aquifer as a leaching starting point can be realized, and the device and method can be suitable for leaching tests of different purposes. In addition, the flow direction of the leachate in the embodiment of the application is from the lower end to the upper end of the organic glass tube group, so that the leachate can fully infiltrate the rock stratum simulation material, and the actual condition can be simulated more effectively.
Drawings
In order to more clearly illustrate the technical solutions in the present application or the related art, the drawings needed to be used in the description of the embodiments or the related art will be briefly introduced below, and it is obvious that the drawings in the following description are only embodiments of the present application, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic diagram of a groundwater leaching simulation apparatus according to an embodiment of the present application;
FIG. 2 is a schematic view of a plexiglass tube connection assembly of an embodiment of the present application;
FIG. 3 is a flow chart of a groundwater leaching simulation method according to an embodiment of the present application.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is further described in detail below with reference to specific embodiments and the accompanying drawings.
It should be noted that technical terms or scientific terms used in the embodiments of the present application should have a general meaning as understood by those having ordinary skill in the art to which the present application belongs, unless otherwise defined. The use of "first," "second," and similar terms in the embodiments of the present application do not denote any order, quantity, or importance, but rather the terms are used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that the element or item listed before the word covers the element or item listed after the word and its equivalents, but does not exclude other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships may also be changed accordingly.
As described in the background section, the groundwater leaching simulation apparatus in the related art ignores the influence of composition change of each rock stratum along the depth and composition characteristic difference of different regions, which causes a large deviation from the actual situation of the chemical reaction type and reaction degree from the actual process difference in the process of the simulation experiment, and on the other hand, in the existing leaching experiment of groundwater and the like, the groundwater permeation process and mechanism are often analyzed without considering the content of permeability variation and the like before and after mining of the regional aquifer structure, which causes a certain deviation of data obtained based on the water chemistry characteristics, and the credibility of the analysis result is reduced.
In addition, the flow direction of the leachate in the prior art is generally from top to bottom, so that the leachate is difficult to fully infiltrate the simulated rock stratum, and the final result is deviated.
Synthesize above-mentioned consideration, this application provides an underground water leaching analogue means, utilize the peristaltic pump with the leachate from supreme leaching of follow down, make the abundant rock stratum analog material in the glass nest of tubes of process of leachate, effectively simulate out the groundwater leaching condition among the actual conditions, and can place multiple rock stratum analog material in the glass nest of tubes, and each organic glass pipe is corresponding to a rock stratum analog material, make the leachate that obtains among the stratified sampling mouth really pass through the rock stratum analog material of complete thickness in this corresponding organic glass pipe, the simulation result is more accurate, furthermore, effectively realized the simulation to the complicated geological conditions. In addition, rock stratum simulation materials in the glass tube group can be adjusted according to actual conditions, so that the leaching simulation taking a specific water-containing layer as a leaching starting point can be realized, and the method can be suitable for the leaching simulation under different purposes.
Hereinafter, the technical means of the embodiments of the present application will be described in detail by specific examples.
Referring to fig. 1, a schematic diagram of a groundwater leaching simulation device according to an embodiment of the present application is shown. Referring to fig. 2, a schematic view of a plexiglas tube connection assembly according to an embodiment of the present application is shown.
As shown in fig. 1 and 2, the groundwater leaching simulation apparatus includes: the device comprises a leachate 1, a peristaltic pump 2, a water passing gasket 3, a nylon wire mesh 4, quartz sand 5, a first rock stratum simulation material 6, a second rock stratum simulation material 7, a third rock stratum simulation material 8, a fourth rock stratum simulation material 9, a fifth rock stratum simulation material 10, an organic glass tube 11, a waste liquid bottle 12, a layered sampling port 13, an upper threaded port 14, a lower threaded port 15, a water outlet threaded port 16 and a water inlet threaded port 17.
In this embodiment, the leachate 1 is connected to the peristaltic pump 2, the peristaltic pump 2 is connected to the lower end of the organic glass tube group, specifically, the peristaltic pump 2 is in threaded connection with the lower threaded connector 15 of the organic glass tube 11 connected to the peristaltic pump 2 in the organic glass tube group through the water inlet threaded connector 17, and is configured to pump the leachate 1 from the lower end of the organic glass tube group to the upper end of the organic glass tube group, and the water outlet threaded connector 16 is in threaded connection with the organic glass tube 11 connected to the waste liquid bottle in the organic glass tube group. The leachate 1 after sampling is collected in a waste liquid bottle 12.
Wherein, in order to make at actual simulation in-process, avoid leaching liquid 1 directly to flow away from the rock stratum simulation material and organic glass pipe 11's the inner wall crack to make final simulation result inaccurate, organic glass pipe 11 inner wall is the coarse wall, be used for with rock stratum simulation material closely laminates. Specifically, the inner wall of organic glass pipe 11 need use abrasive paper to polish it before using, so that its inner wall surface becomes rough, and then make there is not the gap as far as possible between 11 inner walls of organic glass pipe and rock stratum analog material, make leachate 1 almost all fully reach the upper end of organic glass pipe 11 again after rock stratum analog material leaches, and not flow through from the clearance between 11 inner walls of organic glass pipe and rock stratum analog material, so that the follow-up experimental result that utilizes this leachate 1 to carry out the experiment is inaccurate.
The aforesaid is to the design of moving towards of leachate 1, relies on gravity to make leachate 1 leach from the rock stratum simulation material from last down among the prior art, and this application uses peristaltic pump 2 to make it move towards for supreme down, because need make 1 abundant infiltration rock stratum simulation material of leachate to make final simulation result more press close to actual conditions, and then make final simulation result more accurate.
The upper threaded opening and the lower threaded opening of the organic glass tube 11 are provided with the water passing gasket 3, the nylon wire mesh 4 and the quartz sand 5, and besides, the upper threaded opening and the lower threaded opening of the organic glass tube 11 are also provided with glass beads.
In addition, a first rock stratum simulation material 6, a second rock stratum simulation material 7, a third rock stratum simulation material 8, a fourth rock stratum simulation material 9 and a fifth rock stratum simulation material 10 are respectively placed in organic glass tubes 11 with corresponding thicknesses, and the materials are sequentially arranged in the organic glass tube group formed by final combination through a water passing gasket 3-glass beads-nylon wire mesh 4-quartz sand 5-water passing gasket 3-nylon wire mesh 4-first rock stratum simulation material 6-water passing gasket 3-nylon wire mesh 4-second rock stratum simulation material 7-water passing gasket 3-nylon wire mesh 4-third rock stratum simulation material 8-water passing gasket 3-nylon wire mesh 4-fourth rock stratum simulation material 9-water passing gasket 3-nylon wire mesh 4-fifth rock stratum simulation material 10-water passing gasket 3-nylon wire mesh 4-quartz sand 5-nylon wire mesh 4-glass beads-water passing gasket 3. In this embodiment, there are a first rock stratum simulation material 6, a second rock stratum simulation material 7, a third rock stratum simulation material 8, a fourth rock stratum simulation material 9 and a fifth rock stratum simulation material 10, and those skilled in the art should know that the above five rock stratum simulation materials may be adaptively adjusted according to actual needs, including but not limited to the type and number of the rock stratum simulation materials, and may be adaptively modified and added according to actual needs, and the thickness of each rock stratum simulation material may be correspondingly adjusted after calculating a proportion according to actual conditions.
In a possible embodiment, the side wall of each plexiglass tube 11 is provided with a stratified sampling port 13, and the stratified sampling port 13 is arranged at the lower end of the upper threaded interface 14 of the plexiglass tube 11 for obtaining the leachate 1 through the rock formation simulating material in the corresponding plexiglass tube 11. The purpose of designing layered sampling port 13 is in order to realize the simulation effect under the multiple condition in one leaching simulation process, because each rock stratum analog material all places in solitary organic glass pipe 11, and each organic glass pipe 11 all is provided with a layered sampling port 13, then this groundwater leaching simulation process can once only simulate the simulation effect under five kinds of circumstances, one is the leaching process through first to fifth rock stratum analog material, one is the leaching process through first to fourth rock stratum analog material, one is the leaching process through first to third rock stratum analog material, one is the leaching process through first to second rock stratum analog material 7, one is the leaching process through first rock stratum analog material 6. To sum up, 11 lateral walls of organic glass pipe at every rock stratum analog material corresponding position all are provided with layering sample connection 13, then can simulate groundwater leaching process under the various condition, in addition, can also change the content of first to fifth rock stratum analog material, and cooperation layering sample connection 13 can realize the simulation of groundwater leaching process under the various complicated geological conditions basically.
In this embodiment, the inner diameter of the organic glass tube 11 is set to 40mm, the height of the organic glass tube 11 is set to 5cm, 6cm, 7cm, 8cm and 9cm, the thickness of the upper screw interface 14 and the thickness of the lower screw interface 15 are 2cm, and the height of the middle end of the organic glass tube 11 is 1cm, 2cm, 3cm, 4cm and 5cm. It should be noted that the above embodiment is only exemplary, if the actually calculated simulated rock thickness does not exist in the height of the middle end of the organic glass tube 11, the thickness of the middle end of the organic glass tube 11 can be set according to actual needs to meet the thickness requirement of the rock simulation material, and in addition, the thickness of the simulated rock thickness can meet the experimental requirement by adjusting the thicknesses of the water shim 3, the nylon wire mesh 4, the quartz sand 5 and the glass beads. It should be noted that if the thicknesses of the water passing gasket 3, the nylon wire mesh 4, the quartz sand 5 and the glass beads are adjusted, the total thickness of the water passing gasket 3, the nylon wire mesh 4, the quartz sand 5 and the glass beads in the control group is correspondingly adjusted when the control group is set in the subsequent method step, and the total thickness is kept consistent with that of the experimental group.
Can see through above-mentioned embodiment, this application embodiment groundwater leaching analogue means, place in different organic glass pipe 11 through the rock stratum analog material that will differ, further utilize above-mentioned organic glass pipe 11 to construct the organic glass nest of tubes, the realization is simulated the complicated geologic body under the multilayer rock stratum stack effect, and the actual geology condition that the rock stratum analog material in the organic glass nest of tubes can simulate as required increases and decreases, it can promptly to increase and decrease the organic glass pipe 11 in the organic glass nest of tubes promptly to correspond, the realization that can be simple and convenient is followed the leaching simulation of specific water-bearing stratum as the leaching starting point, can adapt to the leaching experiment of different purposes. In addition, the flow direction of the leachate 1 in the embodiment of the application is from the lower end to the upper end of the organic glass tube group, so that the leachate 1 can fully infiltrate the rock stratum simulation material, and the actual situation can be simulated more effectively.
Based on the same inventive concept, the embodiment of the application also provides an underground water leaching simulation method. Referring to fig. 3, the groundwater leaching simulation method using the groundwater leaching simulation device includes the following steps:
step S301, selecting the organic glass tube with the corresponding thickness according to the calculated putting thickness of each layer of rock stratum simulation material; combining the organic glass tubes with corresponding thicknesses to obtain an organic glass tube group;
step S302, calculating the input quality of each layer of rock stratum simulation material according to the input thickness of each layer of rock stratum simulation material;
step S303, sequentially putting each layer of rock stratum simulation material into an organic glass tube corresponding to an organic glass tube group according to the putting quality of each layer of rock stratum simulation material;
and step S304, starting a peristaltic pump, and pumping the leachate from the lower end of the organic glass tube group to the upper end of the organic glass tube group.
In a possible embodiment, before step S301, the stratum to be simulated needs to be analyzed. Firstly, a raw ore sample is collected, and XRD/XRF detection is carried out on the collected raw ore sample to determine the content of each component. Furthermore, hydrological geochemical data and mining technical conditions of a mining area are consulted, relevant parameters of rock strata are obtained according to the collected data, and the mixture ratio of simulation materials of each simulation stratum is designed by an orthogonal experiment under the condition of known component content.
Further, a plurality of plexiglass tubes 11 having an inner diameter of 40mm and a height of 30 cm were prepared and the inner walls thereof were ground with sandpaper.
Further, small-particle-size crude ore blocks which are air-dried and ground under natural conditions and sieved out by a 35-mesh screen are used as experimental materials or first to fifth rock stratum simulation materials (6-10) are prepared according to selected preparation proportions.
In the embodiment, the first to fifth formation simulation materials are selected to be manufactured according to the selected configuration ratio. The sample preparation process of this example includes: simulating a fourth series of pore diving aquifers (using coarse sand) by using river sand and sandy loam (a fifth rock stratum simulation material 10); a small amount of mica powder is mixed into the clay to simulate the recent system Baode group laterite (fourth rock stratum simulation material 9); river sand is used as aggregate, aggregate of each rock stratum is respectively screened out by 12-mesh (coarse sand), 35-mesh (medium sand) and 120-mesh (fine sand) grid sieves according to particle size, gypsum powder and matcha powder are used as cementing materials, talcum powder, rock salt blocks and dolomite blocks are used as filling materials, borax is used as retarder, and the aggregate is prepared according to a design proportion to simulate deeper aquifers (a third rock stratum simulation material 8) such as dwarfit Luo Tong and the like; the purplish red mudstone, sandy mudstone and feldspar sandstone in the weathered bedrock fracture confined water aquifer are 9:1 (medium sand), 4:1, the gypsum can be prepared according to the weight ratio of silver nitrate, 1 percent of borax and 11 percent of water content of a test piece. Determining the specific contents of the fillers such as talcum powder, rock salt blocks and dolomite blocks according to an XRD/XRF detection result, and slightly reducing the content of aggregate river sand for adjustment on the basis of adding large rocks; for mudstone, sandy mudstone and medium-coarse sandstone in confined aquifer of Jurassic system middle system Luo Zukong fracture (second rock stratum simulation material 7), the weight ratio of 9:1 (mixed with medium sand and fine sand), 3:1 or a slightly larger gypsum can be prepared by proportioning 1% of silver, 1% of borax and 11% of test piece water content, the specific contents of the fillers such as talcum powder, rock salt blocks and dolomite blocks are determined according to XRD/XRF detection results, and the content of aggregate river sand is slightly reduced and adjusted on the basis of the addition of large rocks; and fine, medium and coarse sandstones (a first rock stratum simulation material 6) in the confined aquifer of the systematic Yanan group pore fissure in the Jurassic system are mixed by the following ratio of 9:1 (with fine sand), 3: the gypsum of 1 can be prepared according to the weight ratio of silver, borax with the concentration of 1% and the water content of a test piece of 11%, the specific contents of the fillers such as talcum powder, rock salt blocks and dolomite blocks are determined according to XRD/XRF detection results, and the content of aggregate river sand is slightly reduced and adjusted on the basis of the addition of large rock blocks. The permeability coefficient of the material can be slightly adjusted by adding a permeation enhancing solvent such as laurocapram and the like, and a pore blocking agent such as molybdenum disulfide and the like.
Furthermore, the filling thickness of each rock stratum simulation material is determined according to the proportion of each rock stratum simulation material calculated in the previous step, and a space needs to be reserved at the upper end of the organic glass tube 11 to prevent the internal rock stratum simulation material from expanding after being leached by the leaching solution 1 and leaking out of the organic glass tube group, so that in other embodiments, a person skilled in the art can adjust the height of the organic glass tube group according to the self needs, and correspondingly, the total thickness can also be adjusted adaptively.
Further, after the formation simulation materials are manufactured, the formation simulation materials are air-dried, crushed and sieved under natural conditions, and in this embodiment, a 35-mesh sieve is adopted. And then measuring the dry density of the air-dried rock formation simulating material by using a compaction box, taking the first rock formation simulating material 6 as an example, putting the first rock formation simulating material into the compaction box to compact the first rock formation simulating material so as to obtain the compacted volume and weight of the first rock formation simulating material 6, and further determining the dry density of the first rock formation simulating material 6 according to the ratio of the mass to the volume. According to the above steps, the dry densities of the second to fifth formation-simulating materials are determined.
After the dry density and the filling thickness of each rock stratum simulation material are determined, the putting quality of the rock stratum simulation material needs to be determined, and the putting quality of the corresponding rock stratum simulation material can be calculated according to the filling thickness, the inner diameter of the organic glass tube 11 and the dry density of the rock stratum simulation material obtained through calculation. According to the calculated putting quality, putting each rock stratum simulation material into the organic glass tube 11 with the corresponding thickness, wherein the sample loading sequence is as follows: filling a leaching column from bottom to top, and sequentially placing a water passing gasket 3-glass beads-150-mesh nylon wire mesh (nylon wire mesh 4) -quartz sand 5-water passing gasket 3-150-mesh nylon wire mesh (nylon wire mesh 4) -simulated tight sandstone (first rock stratum simulation material 6) -water passing gasket 3-150-mesh nylon wire mesh (nylon wire mesh 4) -simulated mudstone and sandy mudstone (second rock stratum simulation material 7) -water passing gasket 3-150-mesh nylon wire mesh (nylon wire mesh 4) -simulated bedrock (third rock stratum simulation material 8) -water passing gasket 3-150-mesh nylon wire mesh (nylon wire mesh 4) -simulated recent system Baoder group (fourth rock stratum simulation material 9) -water passing gasket 3-150-mesh nylon wire mesh (nylon wire mesh 4) -river sand or sandy loam (fifth rock stratum simulation material 10) -water passing gasket 3-150-mesh nylon wire mesh (nylon wire mesh 4) -quartz sand 5-150-mesh nylon wire mesh (nylon wire mesh 4) -glass beads-water passing gasket 3. The formation-simulating material laid within each plexiglas tube 11 requires compaction.
The water spacer 3 and the nylon wire mesh 4 are used for separating different rock stratum simulation materials, so the mesh number of the nylon wire mesh 4 is required to be larger than the mesh number of the nylon wire mesh 4 which is sieved in advance. It should be noted that the mesh number of the nylon wire mesh 4 shown in the above embodiments is only illustrative, and may be changed to other mesh numbers according to specific needs.
After the plexiglass tube 11 is installed, the total weight is measured and recorded as m 1 Then soaking the powder in distilled water for 24 hours until the powder is saturated with water, weighing again to obtain a mass m 2 Then using the formula (m) 2 -m 1 )/ρ Water (W) And calculating to obtain apparent porosity, then after secondary water passing, collecting and weighing the discharged water, calculating to obtain the effective porosity of the leaching column, and calculating the leaching progress of the leaching column through the effective porosity.
After rock stratum simulation materials in the organic glass tube group are filled, the leaching solution 1 is proportioned, and a prepared solution of rainwater, river water and upper-layer underground water in a research area is taken to perform a simulation experiment of the underground process of leaching coal mines by the underground water in a water-bearing layer. Water inflow amount of 665m in 12 disc area for coal mining in Cao's beach 3 The flow rate of the peristaltic pump 2 is correspondingly designed as follows: 0.0051ml/s, the water passing volume of each leaching column is 0.44L per day according to the inner diameter conversion of the leaching column, the total amount of the leaching solution 1 is set according to the water inrush time, and the experimental time is set as a controllable variable. The layered sampling port 13 is used for sampling from the top to the bottom. The water sample test indexes of each sampling port 13 are constant components, heavy metals (trace components), pH and TDS. Each organic glass tube group needs to be separately provided with a waste liquid bottle 12 for collecting leachate 1.
In addition, it should be noted that after the experiment begins, before leaching is performed by using the leaching solution 1, distilled water is introduced for leaching, the time when leaching begins to run is taken as a zero point, sampling is performed for the first time when the distilled water reaches the upper end water outlet of the organic glass tube 11 for the first time, sampling is performed once a day by taking the time as a base point, the sampling is continued for 2-3 days, the test index result of the sampling point is recorded, and it is expected that after 72 hours, the prepared solution of rainwater, river water and upper groundwater is taken as the leaching solution 1, and leaching is continued until the experiment is finished.
In addition, a control group may be provided for further comparison and confirmation of the leachate 1 components after leaching.
When the experiment begins, the same leachate 1 and the same leaching pump device are used for setting a reference control group, quartz sand 5 and glass beads are filled in the organic glass tube 11, leaching is carried out for 2-3 days along with other experimental groups, and relevant parameter indexes of the liquid obtained by leaching are measured.
After the experimental materials were prepared, the experiment was performed according to the designed flow rate. Sampling once every day after the experiment begins, the whole samplings of organic glass pipe 11, organic glass pipe 11 is from the bottom up into water, and the sampling point sets up from the bottom up, from the top down takes a sample. And (4) carrying out leaching product accumulation quantity test based on the sampled sample, leaching for multiple days, and gradually reducing the sampling frequency according to the sample test index result.
In another possible embodiment, the leaching process after the above embodiments is simulated, and therefore the formation-simulating material is reduced to the first to third formation-simulating materials. Accordingly, the preparation steps are the same as those in the above embodiments, and thus are not described herein again.
In the sample preparation part, river sand is used as aggregate, rock stratum aggregates are respectively classified and screened out by 12-mesh (coarse sand), 35-mesh (medium sand) and 120-mesh (fine sand) grid sieves according to particle sizes, gypsum powder and sialon powder are used as cementing materials, talcum powder, rock salt blocks and dolomite blocks are used as fillers, borax is used as retarder, and deeper aquifers (a third rock stratum simulation material 8) such as dwar Luo Tong and the like are simulated according to the design proportion; the purplish red mudstone, sandy mudstone and feldspar sandstone in the weathered bedrock fracture confined water aquifer are 9:1 (medium sand), 4:1, 1 percent of gypsum, 1 percent of borax, 10 percent of test piece water content and 2 percent of laurocapram. Determining the specific contents of the fillers such as talcum powder, rock salt blocks and dolomite blocks according to an XRD/XRF detection result, and slightly reducing the content of aggregate river sand for adjustment on the basis of adding large rocks; for mudstone, sandy mudstone, medium coarse sandstone (second formation simulating material 7) in the confined aquifer of the jurassia midrange Luo Zukong fissure, with the majority (about 80% thickness, desired thickness taken from the near to the far direction from the surface) at 9:1 (mixed with medium sand and fine sand), 3:1 or a slightly larger gypsum can be prepared by proportioning 1% of silver, 1% of borax, 10% of test piece water content and 2% of laurocapram, the specific contents of the fillers such as talcum powder, rock salt blocks and dolomite blocks are determined according to XRD/XRF detection results, and the content of aggregate river sand is slightly reduced for adjustment on the basis of the addition of large rocks; mudstone, sandy mudstone, medium coarse sandstone in the confined aquifer of the Luo Zukong fissure of the Jurassic system of the rest part (about 20% of the thickness) are mixed in a ratio of 9:1 (mixed with medium sand and fine sand), 3:1 or a slightly larger gypsum can be prepared by the weight ratio of silver, 1% concentration of borax, 10% of test piece water content and 1% of laurocapram, the specific content of the fillers such as talcum powder, rock salt blocks and dolomite blocks is determined according to an XRD/XRF detection result, and the content of aggregate river sand is slightly reduced for adjustment on the basis of the addition of large rocks; and fine, medium and coarse sandstones (a first rock stratum simulation material 6) in the confined aquifer of the systematic Yanan group pore fissure in the Jurassic system are mixed by the following ratio of 9:1 (with fine sand), 3: the gypsum of 1 can be prepared by proportioning 1% of borax, 10% of test piece water content and 0.2-1% of laurocapram, the specific contents of the fillers such as talcum powder, rock salt blocks and dolomite blocks are determined according to XRD/XRF detection results, and the content of aggregate river sand is slightly reduced for adjustment on the basis of the addition of large rocks. Finally, the water passing capacity of the material can be verified through experiments, and the proportion of the permeation enhancing solvent or the pore blocking agent can be adjusted on the basis of the proportion.
Similarly, after the formation simulation materials are prepared, the formation simulation materials are air-dried, pulverized and sieved under natural conditions, and in this embodiment, a 35-mesh sieve is used. Further, the dry density of the air-dried rock formation simulating material is determined by using a compaction box, taking the first rock formation simulating material 6 as an example, the first rock formation simulating material is loaded into the compaction box to be compacted, so as to obtain the compacted volume and weight of the first rock formation simulating material 6, and further, the dry density of the first rock formation simulating material 6 is determined according to the ratio of the mass to the volume. According to the above steps, the dry densities of the second to third formation-simulating materials are determined.
Further, the filling thickness of each rock stratum simulation material is determined according to the proportion of each rock stratum simulation material calculated in the previous step. It should be noted that, the upper end of the organic glass tube 11 of this embodiment also needs to reserve a space to prevent that the interior rock stratum simulation material only leaches the post-expansion of filtrate 1 and leaks out the organic glass tube 11, therefore, in other embodiments, the person skilled in the art can adjust the height of the organic glass tube group according to self needs, correspondingly, the gross thickness also can be adjusted by adaptability.
After the filling thickness of each rock stratum simulation material is determined, the putting quality of the rock stratum simulation material needs to be determined, and the putting quality of the corresponding rock stratum simulation material can be calculated according to the filling thickness, the inner diameter of the organic glass tube 11 and the dry density of the rock stratum simulation material obtained through calculation. According to the calculated putting quality, putting each rock stratum simulation material into the corresponding organic glass tube 11, wherein the sample loading sequence is as follows: the method comprises the steps of filling an organic glass tube group from bottom to top, sequentially placing a water passing gasket 3-glass beads-150-mesh nylon wire mesh (nylon wire mesh 4) -quartz sand 5-water passing gasket 3-150-mesh nylon wire mesh (nylon wire mesh 4) -simulated compact sandstone (first rock stratum simulation material 6) -water passing gasket 3-150-mesh nylon wire mesh (nylon wire mesh 4) -simulated mudstone and sandy mudstone (second rock stratum simulation material 7) -water passing gasket 3-150-mesh nylon wire mesh (nylon wire mesh 4) -simulated weathered bedrock (third rock stratum simulation material 8) -water passing gasket 3-150-mesh nylon wire mesh (nylon wire mesh 4) -quartz sand 5-150-mesh nylon wire (nylon wire mesh 4) -glass beads-water passing gasket 3. The rock formation simulating material is compacted in each plexiglas pipe 11.
The water spacer 3 and the nylon wire mesh 4 are used for separating different rock stratum simulation materials, so the mesh number of the nylon wire mesh 4 is required to be larger than the previous mesh number. It should be noted that the mesh number of the nylon wire mesh 4 shown in the above embodiment is only illustrative, and other mesh numbers are possible.
After rock stratum simulation materials in the organic glass tube group are filled, the leaching solution 1 is proportioned, and a simulation experiment of the underground coal mine leaching process of aquifer underground water is carried out by taking a prepared solution of rainwater, river water and upper layer underground water in a research area. Water inflow amount of 665m in 12 disc area for coal mining in Cao's beach 3 The flow rate of the peristaltic pump 2 is correspondingly designed as follows: 0.0051ml/s, the water passing volume of each leaching column is 0.44L per day according to the conversion of the inner diameter of the leaching column, the total amount of the leaching solution 1 is set according to the water inrush time, and the experimental time is set as a controllable variable. During sampling, the layered sampling ports 13 are sampled from top to bottom, and the water sample testing indexes of each sampling port 13 are constant components + heavy metals (trace components) + pH and TDS. Each column needs to be separately provided with a waste liquid bottle 12 to collect leachate 1.
In addition, it should be noted that after the experiment begins, before leaching is performed by using the leaching solution 1, distilled water is introduced for leaching, the time when leaching begins to run is taken as a zero point, sampling is performed for the first time when the distilled water reaches the upper end water outlet of the organic glass tube 11 for the first time, sampling is performed once a day by taking the time as a base point, the sampling is continued for 2-3 days, the test index result of the sampling point is recorded, and it is expected that after 72 hours, the prepared solution of rainwater, river water and upper groundwater is taken as the leaching solution 1, and leaching is continued until the experiment is finished.
In addition, a control group may be provided for further comparison and confirmation of the leachate 1 components after leaching.
When the experiment is started, the same leaching solution 1 and the same leaching pump device are used for setting a reference control group, a water passing gasket 3, a nylon wire mesh 4, quartz sand 5 and glass beads with the same thickness as that of the experimental group are filled in an organic glass tube 11, and the leaching is carried out for 2-3 days along with other experimental groups, and relevant parameter indexes of the liquid obtained by leaching are measured.
After the experimental materials were prepared, the experiment was performed according to the designed flow rate. Sampling once every day after the experiment begins, the whole samplings of organic glass pipe 11, organic glass pipe 11 is from the bottom up into water, and the sampling point sets up from the bottom up, from the top down takes a sample. And (4) carrying out leaching product accumulation quantity test based on the sampled sample, leaching for multiple days, and gradually reducing the sampling frequency according to the sample test index result.
According to the underground water leaching simulation method, the leaching process of the stratum simulation materials of each layer can be simulated, the types and the number of the stratum simulation materials in the organic glass pipe group can be flexibly designed, and any stratum simulation material can be selected as a starting point. The real leaching process in reality is simulated to the maximum extent.
It should be noted that the method of the embodiment of the present application may be executed by a single device, such as a computer or a server. The method of the embodiment can also be applied to a distributed scene and is completed by the mutual cooperation of a plurality of devices. In this distributed scenario, one device of the multiple devices may only perform one or more steps of the method of the embodiment of the present application, and the multiple devices interact with each other to complete the method.
It should be noted that the above describes some embodiments of the present application. Other embodiments are within the scope of the following claims. In some cases, the actions or steps recited in the claims may be performed in a different order than in the embodiments described above and still achieve desirable results. In addition, the processes depicted in the accompanying figures do not necessarily require the particular order shown, or sequential order, to achieve desirable results. In some embodiments, multitasking and parallel processing may also be possible or may be advantageous.
Those of ordinary skill in the art will understand that: the discussion of any embodiment above is meant to be exemplary only, and is not intended to intimate that the scope of the disclosure, including the claims, is limited to these examples; within the context of the present application, features from the above embodiments or from different embodiments may also be combined, steps may be implemented in any order, and there are many other variations of the different aspects of the embodiments of the present application as described above, which are not provided in detail for the sake of brevity.
In addition, well-known power/ground connections to Integrated Circuit (IC) chips and other components may or may not be shown in the provided figures for simplicity of illustration and discussion, and so as not to obscure the embodiments of the application. Furthermore, devices may be shown in block diagram form in order to avoid obscuring embodiments of the application, and this also takes into account the fact that specifics with respect to implementation of such block diagram devices are highly dependent upon the platform within which the embodiments of the application are to be implemented (i.e., specifics should be well within purview of one skilled in the art). Where specific details (e.g., circuits) are set forth in order to describe example embodiments of the application, it should be apparent to one skilled in the art that the embodiments of the application can be practiced without, or with variation of, these specific details. Accordingly, the description is to be regarded as illustrative instead of restrictive.
While the present application has been described in conjunction with specific embodiments thereof, many alternatives, modifications, and variations of these embodiments will be apparent to those skilled in the art in light of the foregoing description. For example, other memory architectures, such as Dynamic RAM (DRAM), may use the discussed embodiments.
The present embodiments are intended to embrace all such alternatives, modifications and variances which fall within the broad scope of the appended claims. Therefore, any omissions, modifications, substitutions, improvements, and the like that may be made without departing from the spirit and principles of the embodiments of the present application are intended to be included within the scope of the present application.
Claims (10)
1. The utility model provides an underground water leaching analogue means which characterized in that includes:
organic glass tubes with different heights, a rock stratum simulation material, leachate and a peristaltic pump;
each organic glass tube is used for placing the rock stratum simulation material with a corresponding height;
the organic glass tubes can be combined to obtain an organic glass tube group for simulating an underground rock stratum;
the peristaltic pump is connected with the lower end of the organic glass tube group and used for pumping the leachate from the lower end of the organic glass tube group provided with the rock stratum simulation material to the upper end of the organic glass tube group.
2. The apparatus of claim 1, further comprising: a water passing gasket and a nylon wire mesh; the organic glass tube is also provided with an upper threaded port and a lower threaded port;
the water passing gasket and the nylon wire mesh are arranged at the upper threaded port and the lower threaded port of the organic glass pipe and used for separating different types of rock stratum simulation materials.
3. The device of claim 2, wherein the plexiglas tube is combinable to provide a plexiglas tube set comprising:
in response to the number of the organic glass tubes being one, taking the organic glass tubes as the organic glass tube groups;
and responding to that the number of the organic glass tubes is more than one, and at least two of the organic glass tubes are connected in a threaded manner through the upper threaded port and the lower threaded port to obtain the organic glass tube group.
4. The device according to claim 2, wherein the perspex tube side wall is provided with a stratified sampling port;
the layered sampling port is arranged at the lower end of the upper threaded connector of the organic glass pipe and used for obtaining the leachate passing through the rock stratum simulation material in the corresponding organic glass pipe.
5. A method of simulating groundwater leaching using the apparatus of any of claims 1-4, comprising:
selecting the organic glass tube with the corresponding thickness according to the calculated putting thickness of each layer of rock stratum simulation material; combining the organic glass tubes with corresponding thicknesses to obtain an organic glass tube group;
calculating the input quality of each layer of rock stratum simulation material according to the input thickness of each layer of rock stratum simulation material;
according to the placing quality of each layer of rock stratum simulation material, sequentially placing each layer of rock stratum simulation material into an organic glass tube corresponding to the organic glass tube group;
and starting a peristaltic pump, and pumping leachate from the lower end of the organic glass tube group to the upper end of the organic glass tube group.
6. The method of claim 5, wherein the plunge thickness of each layer of formation-simulating material is calculated by:
determining the thickness proportion of each layer of the rock stratum simulation material;
and calculating the thickness of each layer of the rock stratum simulation material according to the thickness proportion and the total thickness of the obtained rock stratum simulation material.
7. The method of claim 5, wherein calculating the input mass of each layer of the rock formation simulation material according to the input thickness of each layer of the rock formation simulation material comprises:
and calculating the dry density of each layer of the rock stratum simulation material, and determining the input quality of each layer of the rock stratum simulation material according to the input thickness and the dry density of each layer of the rock stratum simulation material.
8. The method of claim 7, wherein the dry density of the formation-simulating material is calculated by:
putting the air-dried rock stratum simulation material into a compaction box for compaction to obtain the volume and the mass of the rock stratum simulation material;
and calculating the dry density of the rock stratum simulation material according to the volume and the mass of the rock stratum simulation material.
9. The method of claim 5, further comprising:
and responding to the peristaltic pump to pump the leachate to the upper end of the organic glass tube group, and obtaining the leachate passing through different rock stratum simulation materials from different layered sampling ports.
10. The method of claim 5, further comprising:
before the leachate is utilized to leach the rock stratum simulation material, circulating distilled water from the lower end of the organic glass pipe to the upper end of the organic glass pipe by using a peristaltic pump within preset time.
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