CN111366403B - Device and method for detecting grouting filling treatment effect of coal mine goaf - Google Patents
Device and method for detecting grouting filling treatment effect of coal mine goaf Download PDFInfo
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- CN111366403B CN111366403B CN202010215321.9A CN202010215321A CN111366403B CN 111366403 B CN111366403 B CN 111366403B CN 202010215321 A CN202010215321 A CN 202010215321A CN 111366403 B CN111366403 B CN 111366403B
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- 239000003245 coal Substances 0.000 title claims abstract description 34
- 230000000694 effects Effects 0.000 title claims abstract description 29
- 238000000034 method Methods 0.000 title claims abstract description 14
- 238000005553 drilling Methods 0.000 claims abstract description 45
- 238000001514 detection method Methods 0.000 claims abstract description 40
- 238000012360 testing method Methods 0.000 claims abstract description 35
- 238000011065 in-situ storage Methods 0.000 claims abstract description 30
- 238000005070 sampling Methods 0.000 claims abstract description 16
- 238000004062 sedimentation Methods 0.000 claims abstract description 15
- 238000012806 monitoring device Methods 0.000 claims abstract description 14
- 238000000926 separation method Methods 0.000 claims abstract description 14
- 230000035515 penetration Effects 0.000 claims abstract description 5
- 230000001681 protective effect Effects 0.000 claims description 38
- 229910000831 Steel Inorganic materials 0.000 claims description 16
- 239000010959 steel Substances 0.000 claims description 16
- 238000005452 bending Methods 0.000 claims description 12
- 238000012544 monitoring process Methods 0.000 claims description 12
- 229910001220 stainless steel Inorganic materials 0.000 claims description 9
- 239000010935 stainless steel Substances 0.000 claims description 9
- 238000009933 burial Methods 0.000 claims description 8
- 230000002706 hydrostatic effect Effects 0.000 claims description 7
- 230000003068 static effect Effects 0.000 claims description 7
- 230000009286 beneficial effect Effects 0.000 claims description 5
- 230000006578 abscission Effects 0.000 claims description 4
- 239000004568 cement Substances 0.000 claims description 3
- 239000011152 fibreglass Substances 0.000 claims description 3
- 238000004080 punching Methods 0.000 claims description 3
- 238000007711 solidification Methods 0.000 claims description 3
- 230000008023 solidification Effects 0.000 claims description 3
- 229920002972 Acrylic fiber Polymers 0.000 claims description 2
- 238000002474 experimental method Methods 0.000 abstract description 2
- 238000005065 mining Methods 0.000 description 5
- 238000011156 evaluation Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 238000004088 simulation Methods 0.000 description 2
- 230000009897 systematic effect Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 230000032798 delamination Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
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- G—PHYSICS
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/04—Devices for withdrawing samples in the solid state, e.g. by cutting
- G01N1/08—Devices for withdrawing samples in the solid state, e.g. by cutting involving an extracting tool, e.g. core bit
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- E21B49/00—Testing the nature of borehole walls; Formation testing; Methods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells
- E21B49/02—Testing the nature of borehole walls; Formation testing; Methods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells by mechanically taking samples of the soil
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C5/00—Measuring height; Measuring distances transverse to line of sight; Levelling between separated points; Surveyors' levels
- G01C5/04—Hydrostatic levelling, i.e. by flexibly interconnected liquid containers at separated points
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Abstract
The method for detecting the grouting filling treatment effect of the coal mine goaf specifically comprises the following steps: drilling and sampling the stratum of the coal mine goaf, the fracture zone and the caving zone after grouting filling, wherein the sampling of the stratum layer of each part is not less than 3; detecting sedimentation amount in a goaf, a fissure zone and a caving zone after grouting filling; the mechanical index of the obtained in-situ standard penetration test, the physical and mechanical property detection index of the obtained sample core in a laboratory, and the numerical value of the sedimentation amount detected by the sedimentation mark in the goaf and the non-goaf. The arrangement of the ground surface detection device and the goaf and separation layer settlement monitoring devices with different depths facilitates observation, detection and reading of numerical values of settlement amounts of the settlement rods in the goaf and the non-goaf, provides important parameters for experiments, and can conveniently and efficiently collect and detect the compactness condition and the settlement condition of grouting in the adopted area.
Description
Technical Field
The invention belongs to the technical field of coal mining goaf treatment detection, and particularly relates to a device and a method for detecting a grouting filling treatment effect of a coal mine goaf.
Background
The vast majority of coal mines in China belong to underground coal mines. Coal mines encompass a large area above ground and below ground as well as associated facilities. At present, a goaf can be formed underground after coal mining, and the stratum on the upper part of the goaf gradually deforms along with the time, so that a bending zone, a crack zone and a caving zone are formed, the earth surface becomes a sunk ground, and the bearing capacity of a foundation is reduced. If the coal mining subsidence area which is not stably sunk and is stably sunk is used as a construction land, after the load of an upper structure is increased, the structure foundation and the stratum of the adjacent goaf can continue to be unevenly settled, and if the problem is solved, grouting, filling, pre-solidifying and pre-treating are carried out on the bending zone, the crack zone, the caving zone and the goaf of the structure foundation and the adjacent stratum of the coal mining subsidence area so as to reduce or eliminate uneven settlement of the foundation caused by coal mining subsidence.
However, in the present stage, no good detection device is used for detecting the foundation treatment effect after grouting and filling in the coal mine goaf, and no systematic method is used for detecting the foundation treatment effect after grouting and filling in the coal mine goaf.
Therefore, the invention provides a device and a method for detecting the grouting filling treatment effect of the coal mine goaf.
Disclosure of Invention
In order to solve the technical problems, the invention provides a coal mine goaf grouting filling treatment effect detection device and a detection method, which aim to solve the problems that at present, no more accurate detection device exists for the foundation treatment effect after the coal mine goaf grouting filling, and no systematic method is formed for detecting the foundation treatment effect after the coal mine goaf grouting filling, the existing detection is mostly single detection, and the detection effect cannot be convincing to the public and building design units, and the coal mine goaf grouting filling treatment effect detection device comprises a ground surface, an in-situ test drilling machine, a drill rod, an undisturbed core, a goaf, pre-grouting in the goaf, a ground surface detection device, upper goaf abscission grouting, goafs with different depths and a settlement monitoring device of abscission layers; an arc separation layer is formed at the upper part of the goaf grouting; the drill rod of the in-situ test drilling machine is arranged at the lower part of the drilling machine; the undisturbed core is obtained by drilling through an in-situ test drilling machine; the ground surface detection device comprises a steel plate, a load placing cavity, a load, an observation inserting plate and a protective cover, wherein the bottom of the protective cover is connected to the steel plate through a bolt; the load placing cavity is arranged inside the protective cover; the load is sequentially placed on the upper part of the steel plate and inside the load placing cavity; the observation plugboard is inserted at the outer side of the protective cover, and the load placing cavity, the load, the observation plugboard and the protective cover are respectively provided with a pair; the settlement monitoring device for the goaf and the separation layer at different depths comprises a static level gauge, a protection tube, a support rod, a centralizer and a protection cover, wherein the static level gauge is respectively installed on the upper part of the inner side of the protection cover through bolts, and the support rod is placed in the protection tube; the centralizer cup joints the outside at the bracing piece, protection tube and subside the pole and all run through and place in the drilling of steel sheet lower part, the protection shroud connect in the upper end of subsiding the pole, the collecting space area of the different degree of depth and the settlement monitoring device of absciss layer can set up a set of or multiunit according to the area that the structure occupied collecting space area upper portion.
Preferably, the load adopts cuboid or cube equal-weight cement blocks, which is beneficial to calculating the load during detection.
Preferably, the protection casing specifically adopt the stainless steel cover of rectangle, the protection casing respectively to the outside opening, and the local inboard of open-ended has seted up the rectangular channel of all having indent around 2, the observation picture peg from last to down peg graft in protection casing outside open-ended rectangular channel, conveniently observe to detect and conveniently get and put the load.
Preferably, the observation flashboard adopts a transparent acrylic plastic rectangular board or a transparent glass fiber reinforced plastic rectangular board.
Preferably, the centralizer adopts a ball centralizer.
The sedimentation rod is a stainless steel rod, and the lower part of the sedimentation rod is welded with a stainless steel sawtooth-shaped auxiliary support sheet.
The method for detecting the grouting filling treatment effect of the coal mine goaf specifically comprises the following steps:
the method comprises the following steps: drilling and sampling a part reaching the solidification age in a planned structure area filled by grouting in a goaf, installing a drill rod at the lower part of an in-situ test drilling machine, starting the in-situ test drilling machine to drill, performing sampling and standard penetration in-situ test in a drill hole, and taking out an undisturbed core to perform physical and mechanical property detection and analysis in a geotechnical laboratory;
step two: and detecting settlement in a goaf and a non-goaf, and simulating the simulation of building load detection foundation to reach stable settlement without re-settlement.
Step three: and (3) testing the in-situ test indexes obtained in the first step and the second step and physical and mechanical property parameters obtained by core testing, monitoring sedimentation rods arranged in monitoring holes of a goaf, a fracture zone, a caving zone and a bending zone after grouting, and recording the monitored sedimentation amount of the sedimentation rods, wherein the parameters are used as important parameters for comprehensively evaluating the grouting filling quality and effect of the goaf.
Preferably, in step two, in S102, the in-situ testing drilling machine S201 performs non-standard drilling of monitoring holes on the goaf and the non-goaf, and the arrangement position, the sampling depth and the drilling depth of the monitoring holes are as follows: sampling at least 3 stratum layers at the middle upper part of the goaf after grouting filling, the middle upper part of the stratum burial depth of the fracture zone and the caving zone after grouting and the middle upper part of the stratum burial depth of the bending zone; the drilling depth is controlled to be in the middle or the middle upper part of the space depth of the goaf, the fissure zone, the caving zone and the bending zone after grouting filling; s202, after punching is finished, a protective pipe is added in the hole, a sedimentation rod is added in the protective pipe, and 3-5 centralizers are arranged between the protective pipe and the sedimentation rod; s203, respectively installing the static leveling instrument on the upper part of the inner side of the protection tube by bolts, and sequentially placing loads from top to bottom in a load placing cavity on the upper part of the steel plate; and S204, observing and recording the settlement amount of the settlement rod in the protective pipe under the goaf and the non-goaf through a hydrostatic level.
Compared with the prior art, the invention has the following beneficial effects: the arrangement of the ground surface detection device and the goaf and separation layer settlement monitoring devices at different depths is convenient for observation and detection and convenient for taking and placing loads, the settlement rod is further used for detecting the numerical value of the settlement amount in the goaf and the non-goaf to provide important parameters for detection and evaluation, the original sample collection can be carried out through the in-situ test of the drilling machine and the drilling rod of the drilling machine, the sampler at the lower part of the drilling rod is used for carrying out physical and mechanical property index detection in a laboratory, the compactness evaluation is further facilitated, the arrangement of the structure can be used for conveniently and efficiently collecting and detecting the compactness and the settlement condition of grouting in the adopted area, and the further evaluation and research of scientific research personnel are facilitated. The invention discloses a method for detecting the grouting filling treatment effect of a coal mine goaf, which comprises the following steps: drilling and sampling in a goaf, installing a drill rod of the in-situ test drilling machine at the lower part of the in-situ test drilling machine, starting the in-situ test drilling machine to drill and sample in the goaf, then taking out an original core in a sampler at the lower part of the drill rod, putting the original core into a laboratory, further detecting compactness, and performing a standard penetration test in a hole after sampling; detecting the settlement amount of the top of the goaf after grouting filling, the middle upper part of the stratum burial depth of the fractured zone and the caving zone after grouting and the middle upper part of the stratum burial depth of the bending zone; and (3) performing a physical and mechanical property experiment on the undisturbed rock core obtained in the step, observing the detection settlement amount, the detection time span and the like of a settlement rod in the protective pipe in a goaf and a non-goaf through a hydrostatic level gauge, and providing important parameters for evaluating the grouting and filling quality of the goaf.
Drawings
FIG. 1 is a schematic structural diagram of a device for detecting the grouting filling treatment effect of a coal mine goaf.
Fig. 2 is a schematic structural view of the earth surface detecting apparatus of the present invention.
Fig. 3 is a schematic structural diagram of the goaf and separation settlement monitoring device with different depths.
FIG. 4 is a flow chart of the method for detecting the grouting filling treatment effect of the coal mine goaf.
FIG. 5 is a flow chart of the present invention for detecting settling volume in both goafs and non-goafs.
In the figure:
1. a ground surface; 2. testing the drilling machine in situ; 3. a drill stem; 4. an undisturbed core; 5. a gob; 6. grouting in the goaf; 7. a surface detection device; 71. a steel plate; 72. a load placing cavity; 73. loading; 74. observing the plug board; 75. a protective cover; 8. grouting the upper part of the goaf; 9. the settlement monitoring device for goafs and separation layers at different depths; 91. a hydrostatic level; 92. protecting the tube; 93. a settling rod; 94. a centralizer; 95. a protective cover; 10. and (7) delamination.
Detailed Description
The invention is further described below with reference to the accompanying drawings:
in the figure:
as shown in figures 1 to 3
A coal mine goaf grouting filling treatment effect detection device comprises a ground 1, an in-situ test drilling machine 2, a drill rod 3, an undisturbed core 4, a goaf 5, goaf internal grouting 6, a ground surface detection device 7, goaf upper grouting 8, goaf and separation settlement monitoring devices 9 and separation layers 10, wherein the goaf 5 on the lower portion of the ground 1 is pre-injected with the goaf internal grouting 6 and the goaf upper grouting 8; an arc-shaped separation layer 10 is formed at the upper part of the upper grouting 8 of the goaf; the drill rod 3 is arranged at the lower part of the in-situ test drilling machine 2; the inner side of the lower part of the drill rod 3 is drilled with an undisturbed core 4; the ground surface detection device 7 comprises a steel plate 71, a load placing cavity 72, a load 73, an observation inserting plate 74 and a protective cover 75, wherein the bottom of the protective cover 75 is connected to the steel plate 71 through bolts; the load placing cavity 72 is arranged inside the protective cover 75; the load 73 is sequentially placed on the upper part of the steel plate 71 and inside the load placing cavity 72; the observation insertion plate 74 is inserted at the outer side of the protective cover 75, and the load placing cavity 72, the load 73, the observation insertion plate 74 and the protective cover 75 are respectively provided with a pair; the settlement monitoring device 9 for the goaf and the separation layer with different depths comprises a static level gauge 91, a protection tube 92, a settlement rod 93, a centralizer 94 and a 95 protection cover, wherein the static level gauge 91 is respectively installed on the upper part of the inner side of the protection cover 95 through bolts, and the settlement rod 93 is placed in the protection tube 92; the centralizer 94 cup joints in the outside of subsiding pole 93, protection tube 92 and subsiding pole 93 all run through and place in the drilling of steel sheet lower part, the safety cover 95 lid connect in the upper end of subsiding pole 93.
Preferably, the load 73 is a cuboid or square equal-weight cement block, which is beneficial to calculating the load during detection.
Preferably, protection casing 75 specifically adopt the stainless steel cover of rectangle, protection casing 75 respectively to the outside opening, and open-ended local inboard has seted up the rectangular channel of 2 all having indents around, observation picture peg 74 from last to down peg graft in the open-ended rectangular channel in the protection casing 75 outsides, conveniently observe to detect and conveniently get and put the load.
Preferably, the centralizer 94 is a ball centralizer.
Preferably, the support rod 93 is a stainless steel rod, and the lower part of the settling rod 93 is welded with a stainless steel sawtooth-shaped auxiliary support sheet.
Preferably, the protective cover 95 is a hollow cover made of transparent glass fiber reinforced plastic and having a triangular cross section at the upper part and a rectangular cross section at the lower part, so that the working condition of the settling rod 93 can be conveniently observed.
As shown in figures 4 and 5
The method for detecting the grouting filling treatment effect of the coal mine goaf specifically comprises the following steps:
s101: drilling and sampling a part reaching the solidification age in a planned structure area filled by grouting in a goaf, installing a drill rod at the lower part of an in-situ test drilling machine, starting the in-situ test drilling machine to drill, performing sampling and standard penetration in-situ test in a drill hole, and taking out an undisturbed core to perform physical and mechanical property detection and analysis in a geotechnical laboratory;
s102: and detecting settlement in a goaf and a non-goaf, and simulating the simulation of building load detection foundation to reach stable settlement without re-settlement.
S103: and (3) in-situ test indexes obtained in S101 and S102 and physical and mechanical property parameters obtained by core test, monitoring settlement rods arranged in monitoring holes of a goaf, a fracture zone, a caving zone and a bending zone after grouting, and recording the monitored settlement amount of the settlement rods, wherein the parameters are used as important parameters for comprehensively evaluating the grouting filling quality and effect of the goaf.
Preferably, in S102, the in-situ testing drilling machine of S201 performs non-standard monitoring hole drilling on the goaf and the non-goaf, and the arrangement position, the sampling depth and the drilling depth of the monitoring holes are as follows: sampling at least 3 stratum layers at the middle upper part of the goaf after grouting filling, the middle upper part of the stratum burial depth of the fracture zone and the caving zone after grouting and the middle upper part of the stratum burial depth of the bending zone; the drilling depth is controlled to be in the middle or the middle upper part of the space depth of the goaf, the fissure zone, the caving zone and the bending zone after grouting filling; s202, after punching is finished, a protective pipe is added in the hole, a sedimentation rod is added in the protective pipe, and 3-5 centralizers are arranged between the protective pipe and the sedimentation rod; s203, respectively installing the static level gauges on the upper parts of the inner sides of the protection pipes through bolts, and sequentially placing loads from top to bottom in a load placing cavity in the upper part of the steel plate; and S204, observing and recording the settlement amount of the settlement rod in the protective pipe under the goaf and the non-goaf through a hydrostatic level.
Compared with the prior art, the invention has the following beneficial effects: the arrangement of the ground surface detection device and the goaf and separation settlement monitoring devices at different depths is convenient for observation and detection and convenient for taking and placing loads, the settlement rod is further used for detecting the numerical value of the settlement amount in the goaf and the non-goaf to provide important parameters for detection and evaluation, and the original core can be taken out from the sampler at the lower part of the drill rod through in-situ testing of the drill rig and the drill rod to detect the related physical and mechanical properties. The technical solutions of the present invention or similar technical solutions designed by those skilled in the art based on the teachings of the technical solutions of the present invention are all within the scope of the present invention.
Claims (9)
1. A coal mine goaf grouting filling treatment effect detection device comprises a ground, an in-situ test drilling machine, a drill rod, an undisturbed core, a goaf, pre-grouting in the goaf, an earth surface detection device, upper part abscission grouting in the goaf, and goafs and abscission settlement monitoring devices at different depths; an arc-shaped separation layer is formed at the upper part of the goaf grouting; the drill rod of the in-situ test drilling machine is arranged at the lower part of the drilling machine; the undisturbed core is obtained by drilling through an in-situ test drilling machine; the ground surface detection device comprises a steel plate, a load placing cavity, a load, an observation inserting plate and a protective cover, wherein the bottom of the protective cover is connected to the steel plate through a bolt; the load placing cavity is arranged inside the protective cover; the load is sequentially placed on the upper part of the steel plate and inside the load placing cavity; the observation plugboard is inserted at the outer side of the protective cover, and the load placing cavity, the load, the observation plugboard and the protective cover are respectively provided with a pair; the settlement monitoring device for the goaf and the separation layer with different depths comprises hydrostatic levels, protective tubes, supporting rods, a centralizer and a protective cover, wherein the hydrostatic levels are respectively installed on the upper part of the inner side of the protective cover through bolts, and the supporting rods are placed in the protective tubes; the centralizer cup joints the outside at the bracing piece, protection tube and subside the pole and all run through and place in the drilling of steel sheet lower part, the protection shroud connect in the upper end of subsiding the pole, the collecting space area of the different degree of depth and the settlement monitoring device of absciss layer can set up a set of or multiunit according to the area that the structure occupied collecting space area upper portion.
2. The device for detecting the grouting filling treatment effect of the coal mine goaf according to claim 1, wherein the load is a cuboid or a cube of equal-weight cement blocks, which is beneficial to calculating the load during detection.
3. The device for detecting the grouting filling treatment effect in the coal mine goaf according to claim 1, wherein the protective cover is a rectangular stainless steel cover, the protective cover is respectively opened to the outside, 2 inward-concave rectangular grooves are formed in the inner side of the opening, and the observation plugboard is inserted into the rectangular groove opened in the outer side of the protective cover from top to bottom.
4. The device for detecting the grouting filling treatment effect of the coal mine goaf according to claim 1, wherein the observation plugboard is a transparent acrylic plastic rectangular board or a transparent glass fiber reinforced plastic rectangular board.
5. The device of claim 1, wherein the centralizer is a ball centralizer.
6. The device for detecting the grouting filling treatment effect of the coal mine goaf according to claim 1, wherein the settling rod is a stainless steel rod, and a stainless steel sawtooth-shaped auxiliary support sheet is welded at the lower part of the settling rod.
7. The device for detecting the grouting filling treatment effect of the coal mine goaf according to claim 1, wherein the goaf and separation settlement monitoring devices at different depths are arranged in one or more groups according to the area of the structure occupying the upper part of the goaf and the load.
8. A method for detecting the grouting filling treatment effect of a coal mine goaf is characterized by comprising the following steps:
s101: drilling and sampling a part reaching the solidification age in a planned building area filled by grouting in a goaf, installing a drill rod at the lower part of an in-situ test drilling machine, starting the in-situ test drilling machine to drill, performing sampling and standard penetration in-situ test in a drill hole, and taking out an undisturbed core to perform physical and mechanical property detection and analysis in a geotechnical laboratory;
s102: detecting sedimentation amount in a goaf and a non-goaf, simulating a load detection filling area foundation of a building to be constructed, and determining that the filling area foundation is settled stably and does not settle again according to a detection standard;
s103: and (3) in-situ test indexes obtained in S101 and S102 and physical and mechanical property parameters obtained by core test, monitoring settlement rods arranged in monitoring holes of a goaf, a fracture zone, a caving zone and a bending zone after grouting, and recording the monitored settlement amount of the settlement rods, wherein the parameters are used as important parameters for comprehensively evaluating the grouting filling quality and effect of the goaf.
9. The method for detecting the grouting filling treatment effect of the coal mine goaf as claimed in claim 8, wherein in S102, in S201, a drilling machine for in-situ testing punches monitoring holes in goafs and non-goafs, the arrangement positions, the sampling depths and the drilling depths of the monitoring holes: sampling at least 3 stratum layers at the middle upper part of the goaf after grouting filling, the middle upper part of the stratum burial depth of the fracture zone and the caving zone after grouting and the middle upper part of the stratum burial depth of the bending zone; the drilling depth is controlled to be in the middle or the middle upper part of the space depth of the goaf, the fissure zone, the caving zone and the bending zone after grouting filling; s202, after punching is finished, a protective pipe is added in the hole, a sedimentation rod is added in the protective pipe, and 3-5 centralizers are arranged between the protective pipe and the sedimentation rod; s203, respectively installing the static leveling instrument on the upper part of the inner side of the protection tube by bolts, and sequentially placing loads from top to bottom in a load placing cavity on the upper part of the steel plate; and S204, observing and recording the settlement amount of the settlement rod in the protective pipe under the goaf and the non-goaf through a hydrostatic level.
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