CN114351685A - Overlying strata separation layer grouting surface subsidence control method and grouting device thereof - Google Patents
Overlying strata separation layer grouting surface subsidence control method and grouting device thereof Download PDFInfo
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- CN114351685A CN114351685A CN202210023068.6A CN202210023068A CN114351685A CN 114351685 A CN114351685 A CN 114351685A CN 202210023068 A CN202210023068 A CN 202210023068A CN 114351685 A CN114351685 A CN 114351685A
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- 238000000926 separation method Methods 0.000 title claims abstract description 42
- 238000000034 method Methods 0.000 title claims abstract description 28
- 239000002002 slurry Substances 0.000 claims abstract description 101
- 238000005086 pumping Methods 0.000 claims abstract description 69
- 239000011435 rock Substances 0.000 claims abstract description 29
- 239000003245 coal Substances 0.000 claims abstract description 24
- 239000002689 soil Substances 0.000 claims abstract description 20
- 239000012535 impurity Substances 0.000 claims abstract description 10
- 238000005553 drilling Methods 0.000 claims description 32
- 239000011440 grout Substances 0.000 claims description 25
- 238000003756 stirring Methods 0.000 claims description 18
- 238000001914 filtration Methods 0.000 claims description 14
- 230000008093 supporting effect Effects 0.000 claims description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 11
- 238000011049 filling Methods 0.000 claims description 7
- 239000002245 particle Substances 0.000 claims description 7
- 239000000463 material Substances 0.000 claims description 6
- 238000007569 slipcasting Methods 0.000 claims description 6
- 238000004891 communication Methods 0.000 claims description 5
- 238000012360 testing method Methods 0.000 claims description 5
- 238000005452 bending Methods 0.000 claims description 3
- 238000009792 diffusion process Methods 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 230000008569 process Effects 0.000 abstract description 11
- 238000005065 mining Methods 0.000 abstract description 8
- 239000007788 liquid Substances 0.000 description 18
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 8
- 235000017491 Bambusa tulda Nutrition 0.000 description 8
- 241001330002 Bambuseae Species 0.000 description 8
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 8
- 239000011425 bamboo Substances 0.000 description 8
- 238000005516 engineering process Methods 0.000 description 8
- 239000002994 raw material Substances 0.000 description 4
- 239000007787 solid Substances 0.000 description 4
- 230000006578 abscission Effects 0.000 description 3
- 239000004568 cement Substances 0.000 description 3
- 238000010276 construction Methods 0.000 description 3
- 230000009467 reduction Effects 0.000 description 3
- 230000000903 blocking effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005056 compaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
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- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
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Abstract
The invention discloses a method for controlling subsidence of a ground surface by overlying strata and separation layer grouting and a grouting device thereof, which relate to the technical field of coal mining and comprise a grouting pump, wherein a vacuum pump is arranged on one side of the grouting pump, a vertical pumping pipe is sleeved on one side of the grouting pump, an overlying rock-soil layer is arranged on the bottom side of the grouting pump, a thick hard rock stratum is arranged on the bottom side of the overlying rock-soil layer, the vertical pumping pipe is inserted into the overlying rock-soil layer and the thick hard rock stratum, a separation layer space is arranged on the bottom side of the thick hard rock stratum, a caving top plate is arranged on the bottom side of the separation layer space, and a hydraulic support is arranged on the bottom side of the caving top plate. And the slurry does not contain impurities in the grouting process, so that the blockage of a pipeline is avoided, and the grouting quality is ensured.
Description
Technical Field
The invention relates to the technical field of coal mining, in particular to a method for controlling overburden bed separation grouting surface subsidence and a grouting device thereof.
Background
After the underground coal seam is mined, the original rock stress field in the overlying strata is damaged to generate additional stress, and in order to achieve new stress balance, the main stress is changed and transferred rapidly, so that the overlying strata moves, deforms, breaks and even collapses to cause the subsidence of the earth surface, which causes damage to farmlands and buildings and damages to the ecological environment. For this reason, the following countermeasure is often adopted: firstly, passive repair or improvement of deformation resistance of buildings or removal of buildings are adopted on the ground, and the control mode has limited effect; secondly, a safety protection coal pillar is left or a 'strip method' is adopted for mining to support during coal mining, the method has a large amount of retained coal, and the recovery rate is reduced; thirdly, filling the goaf by using water power and wind power in time after coal mining, wherein the filling compactness of the method is poor, and the problem that only a thin coal seam is developed can be solved; fourthly, large-area coordinated successive mining is carried out, so that the ground surface of a mining area uniformly sinks and the ground level is always kept, the method has strict requirements on coal seam occurrence conditions, is difficult to popularize generally due to high technical and management difficulty, and is also a overburden bed separation grouting filling method which is currently popularized.
According to the expected target of reducing subsidence of the ground surface, the separation grouting subsidence reducing technology reasonably designs the size of a mining working face and keeps a section isolation coal column, controls the stability and the stable duration time of a target key layer, adopts a high-pressure grouting method to inject liquid filling materials into a separation space below the key layer by drilling holes through ground grouting, prevents the key layer from breaking and deforming, supports the key layer upwards, compacts a lower deformed stratum downwards, forms a high-pressure filling compaction bearing area from a goaf to the key layer, thereby achieving the purpose of reducing the ground surface subsidence of the goaf, but is limited by the problem of long-distance slurry conveying and is difficult to realize effective supporting subsidence reduction, therefore, the invention provides the vacuum negative pressure separation grouting technology, forms negative pressure in the separation space, can assist slurry transportation, can improve the slurry permeation range and enhance the supporting effect, and during grouting, the slurry is easy to block the pipeline, so in the grouting process, the quality of the cement slurry needs to be strictly controlled to prevent the cement slurry from blocking the pipeline, and therefore, a method for controlling the overburden separation layer grouting surface subsidence and a grouting device thereof need to be designed to solve the problems.
Disclosure of Invention
Aiming at solving the defects in the prior art, the invention aims to provide a method for controlling the overburden strata abscission layer grouting surface subsidence and a grouting device thereof, aiming at improving the existing abscission layer grouting technology, and grouting the abscission layer space by adopting a directional drilling technology and a vacuum negative pressure technology so as to meet the requirements of ultra-long pumping and support subsidence reduction;
meanwhile, when the grouting material is used, the grout is ensured not to contain impurities in the grouting process, the blockage of a pipeline is avoided, and the grouting quality is ensured.
The purpose of the invention can be realized by the following technical scheme:
a overburden bed separation grouting earth surface subsidence grouting device comprises a grouting pump, a vacuum pump is arranged on one side of the grouting pump, a vertical pumping pipe is sleeved on one side of the grouting pump, an overlying rock-soil layer is arranged on the bottom side of the grouting pump, a thick hard rock layer is arranged on the bottom side of the overlying rock-soil layer, the vertical pumping pipe is inserted into the overlying rock-soil layer and the thick hard rock layer, a separation space is arranged on the bottom side of the thick hard rock layer, a caving top plate is arranged on the bottom side of the separation space, a hydraulic support is arranged on the bottom side of the caving top plate, a coal bed is arranged on the bottom side of the caving top plate, a goaf is arranged on one side of the coal bed, a coal bottom plate is arranged on the bottom side of the coal bed, a horizontal pumping pipe is arranged on the bottom side of the thick hard rock layer, shunt pumping pipes are arranged on two sides of the horizontal pumping pipe, the horizontal pump comprises an inner grouting pipe and an outer vacuum pipe, the upper surface of the upper rock-soil layer is provided with a supporting plate, the upper surface of the supporting plate is provided with a supporting rod, the upper surface of the supporting rod is provided with a grouting barrel, one side of the grouting barrel is fixedly provided with a water inlet, one side of the grouting barrel is provided with a feeding assembly, the upper end of the grouting barrel is provided with a stirring assembly, the bottom end of the grouting barrel is provided with a slurry outlet assembly, the slurry outlet assembly is sleeved with a vertical pumping pipe, the slurry outlet assembly is sleeved with the vertical pumping pipe, and the inner cavity of the grouting barrel is provided with a filtering assembly;
the filter assembly includes the piston rod, the spring has been cup jointed to the bottom of piston rod, the upper end fixedly connected with of spring album thick liquid section of thick bamboo, an album thick liquid section of thick bamboo and piston rod cup joint, the bottom fixed mounting of an album thick liquid section of thick bamboo has the fixed block, one side of fixed block is inserted and is equipped with the gag lever post, gag lever post and a slip casting section of thick bamboo fixed connection, the top of an album thick liquid section of thick bamboo is provided with the bulge loop, the upper end fixed mounting of an album thick liquid section of thick bamboo has a thick liquid mouth of pipe, the middle part fixed mounting of an album thick liquid section of thick bamboo has the mouth of pipe of thick liquid, the orificial lower surface of thick liquid of play is provided with the slip casting connecting pipe, the upper surface of an album thick liquid section of thick bamboo is provided with the go-between, the lower fixed surface of go-between installs the lug, go-between and bulge loop equal to the distance in the go-between centre of a circle.
Further, the feeding assembly comprises a sleeve, a hopper is fixedly mounted on the upper surface of the sleeve, a feeding ring is sleeved in the inner cavity of the sleeve, a plurality of troughs are formed in the outer surface of the feeding ring, a first motor is arranged on one side of each feeding ring, a feeding pipe is arranged at the bottom end of the sleeve, and the feeding pipe is sleeved with the grouting barrel.
Further, the stirring assembly comprises a second motor, a guide frame assembly is arranged on the bottom side of the second motor, a driving ring is sleeved in an inner cavity of the guide frame assembly, a second sliding groove is formed in the outer surface of the driving ring, a sliding block is connected to the inner cavity of the second sliding groove in a sliding mode, a stirring blade is fixedly connected to the bottom end of the sliding block, and a connecting rod is arranged on the bottom side of the second motor.
Further, the connecting rod and the driving ring are sleeved, the number of the second sliding grooves is four, the guide frame assembly comprises a fixing frame, two connecting blocks are arranged at the bottom end of the fixing frame in a crossed mode, first sliding grooves are formed in two sides of each connecting block, and the sliding blocks are connected with the first sliding grooves in a sliding mode.
Furthermore, the slurry outlet assembly comprises a slurry outlet connecting pipe, a communicating port is formed in the bottom side of the slurry outlet connecting pipe, a filter disc is fixedly mounted in an inner cavity of the slurry outlet connecting pipe, a sliding ring is connected to the outer surface of the bottom side of the slurry outlet connecting pipe in a sliding mode, a storage box is fixedly mounted at the bottom end of the sliding ring, and a scrap collecting box is connected to the inner cavity of the storage box in a sliding mode.
Further, a plurality of round holes have been seted up to the surface of cassette, connecting hole has been seted up in the receiver that the sliding ring is located, connecting hole and intercommunication mouth block.
A method for controlling the surface subsidence of overburden bed separation grouting is executed by the device and comprises the following steps:
s1, selecting a ground drilling position and a facility arrangement position according to the mine geological conditions and the ground building conditions, and selecting a proper drilling machine to perform directional drilling work according to the compressive strength and the rock stratum thickness of the overlying rock-soil layer;
s2, drilling a vertical borehole by using a drilling machine, drilling into a separation space along the direction of a rock stratum after penetrating through a thick hard rock stratum, and drilling shunt boreholes at two sides;
s3, installing a vertical pumping pipe, a horizontal pumping pipe and a shunt pumping pipe, and testing the tightness and smoothness of the connection by using a water flow test pipeline;
s4, filtering the slurry in multiple layers through the filtering assembly to ensure that the injected slurry does not contain impurities, and sleeving the tail end of the slurry outlet assembly with the upper end of the vertical pumping pipe to enable the slurry to flow into the vertical pumping pipe;
s5, advancing forwards along with the working face, bending and sinking the top plate of the rear goaf, forming a separation space at the top, starting a ground grouting pump and a ground vacuum pump, forming a negative pressure vacuum space near a shunting pumping pipe by utilizing an outer layer vacuum pipe, and assisting in downward flow, diffusion and grouting of grouting slurry;
and S6, continuously propelling the working face, and stably performing negative pressure vacuum grouting to finish the control of the surface subsidence of the separated layer grouting.
Furthermore, the vertical pumping pipe, the horizontal pumping pipe and the shunt pumping pipe are provided with switch valves at each connection node for controlling the slurry filling position.
Furthermore, the overlength vertical pumping pipe, the horizontal pumping pipe and the shunt pumping pipe are all of a double-layer pipe sleeve structure, the inner-layer grouting pipe is used for grouting slurry to flow, and the outer-layer vacuum pipe is connected with a ground vacuum pump and used for forming a negative pressure environment in an absciss layer space.
Furthermore, the aggregate particles of the grouting slurry are-mm, the slump is-mm, the horizontal pumping pipe and the shunt pumping pipe are prefabricated buried pipes, and grouting is timely carried out after the working face is pushed, so that the ground is prevented from sinking.
The invention has the beneficial effects that:
1. the invention improves the existing separation grouting technology, adopts the directional drilling technology and the vacuum negative pressure technology to perform grouting on the separation space, and meets the requirements of ultra-long pumping and support subsidence reduction;
2. the invention ensures that the slurry does not contain impurities in the grouting process, avoids the blockage of pipelines and ensures the grouting quality.
Drawings
The invention will be further described with reference to the accompanying drawings.
FIG. 1 is a schematic view of the overall structure of the ultra-long drilling vacuum negative pressure overburden bed separation grouting earth surface subsidence of the invention;
FIG. 2 is a schematic view of a vertical pumping tube of the present invention;
FIG. 3 is a schematic view of a grouting barrel according to the present invention;
FIG. 4 is a schematic view of the internal structure of the grouting barrel of the invention;
FIG. 5 is a schematic view of the filter assembly of the present invention;
FIG. 6 is a schematic view of the construction of the stirring assembly of the present invention;
FIG. 7 is a schematic view of the construction of the guide frame assembly of the present invention;
FIG. 8 is a schematic view of the drive ring structure of the present invention;
FIG. 9 is a schematic structural view of a feed assembly of the present invention;
FIG. 10 is a schematic view of a feed ring configuration of the present invention;
FIG. 11 is a schematic view of a slurry outlet assembly according to the present invention;
FIG. 12 is a schematic cross-sectional view of the construction of the slurry outlet assembly of the present invention;
FIG. 13 is a schematic view of the chip collecting box of the present invention.
In the figure: 1. grouting pump; 2. a vacuum pump; 3. a vertical pumping pipe; 4. covering a rock-soil layer; 5. a thick hard rock layer; 6. a hydraulic support; 7. a coal seam; 8. a coal bed plate; 9. a shunt pumping pipe; 10. horizontally pumping the pipe; 11. a separation space; 12. caving the top plate; 13. a gob; 14. an inner layer grouting pipe; 15. an outer vacuum tube; 16. a support plate; 17. a support bar; 18. a grouting cylinder; 19. a water inlet; 20. a feed assembly; 201. a sleeve; 202. a hopper; 203. a feeding ring; 204. a trough; 205. a first motor; 206. a feed pipe; 21. a stirring assembly; 211. a second motor; 212. a guide frame assembly; 2121. a fixed mount; 2122. connecting blocks; 2123. a first sliding groove; 213. a drive ring; 214. a second sliding groove; 215. a slider; 216. stirring blades; 217. a connecting rod; 22. a slurry outlet assembly; 221. a slurry outlet connecting pipe; 222. a communication port; 223. a filter disc; 224. a slip ring; 225. a storage box; 226. a scrap collecting box; 23. a filter assembly; 231. a piston rod; 232. a spring; 233. a pulp collecting cylinder; 234. a fixed block; 235. a limiting rod; 236. a convex ring; 237. a slurry outlet pipe orifice; 238. a slurry inlet pipe orifice; 239. grouting a connecting pipe; 2310. a connecting ring; 2311. and (4) a bump.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. 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 present invention, it is to be understood that the terms "opening," "upper," "lower," "thickness," "top," "middle," "length," "inner," "peripheral," and the like are used in an orientation or positional relationship that is merely for convenience in describing and simplifying the description, and do not indicate or imply that the referenced component or element must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be considered as limiting the present invention.
A overburden separation layer grouting earth surface subsidence grouting device comprises a grouting pump 1 as shown in figures 1, 2 and 3, wherein a vacuum pump 2 is arranged on one side of the grouting pump 1, a vertical pumping pipe 3 is sleeved on one side of the grouting pump 1, an upper rock-soil layer 4 is arranged on the bottom side of the grouting pump 1, a thick hard rock layer 5 is arranged on the bottom side of the upper rock-soil layer 4, the vertical pumping pipe 3 is inserted into the upper rock-soil layer 4 and the thick hard rock layer 5, a separation layer space 11 is arranged on the bottom side of the thick hard rock layer 5, a caving top plate 12 is arranged on the bottom side of the separation layer space 11, a hydraulic support 6 is arranged on the bottom side of the caving top plate 12, a coal seam 7 is arranged on the bottom side of the caving top plate 12, a goaf 13 is arranged on one side of the coal seam 7, a coal bottom plate 8 is arranged on the bottom side of the thick hard rock layer 5, a horizontal pumping pipe 10 is arranged on the bottom side of the horizontal pumping pipe 10, shunt pump 9 is arranged on both sides of the horizontal pumping pipe 10, the horizontal pumping pipe 10 comprises an inner layer grouting pipe 14 and an outer vacuum pipe 15, the upper surface of the upper rock-soil covering layer 4 is provided with a supporting plate 16, the upper surface of the supporting plate 16 is provided with a supporting rod 17, the upper surface of the supporting rod 17 is provided with a grouting barrel 18, one side of the grouting barrel 18 is fixedly provided with a water inlet 19, one side of the grouting barrel 18 is provided with a feeding component 20, the upper end of the grouting barrel 18 is provided with a stirring component 21, the bottom end of the grouting barrel 18 is provided with a slurry outlet component 22, the slurry outlet component 22 is sleeved with a vertical pumping pipe 3, the slurry outlet component 22 is sleeved with the vertical pumping pipe 3, the inner cavity of the grouting barrel 18 is provided with a filtering component 23, the ground drilling position and the facility arrangement position are selected according to the mine geological conditions and the ground building conditions, the drilling machine is selected to carry out directional drilling work according to the compressive strength and the rock stratum thickness of the upper rock-soil covering layer 4, vertical drilling holes are drilled by the drilling machine, the drilling machine penetrates through the thick hard rock stratum 5 and then drills along the trend of the rock stratum to penetrate into the separation space 11, drilling divided holes on two sides, installing a vertical pumping pipe 3, a horizontal pumping pipe 10 and a divided pumping pipe 9, connecting the tightness and smoothness by using a water flow test pipeline, filtering the grout in multiple layers by a filtering assembly 23 to ensure that the injected grout does not contain impurities, sleeving the tail end of a grout outlet assembly 22 with the upper end of the vertical pumping pipe 3, enabling the grout to flow into the vertical pumping pipe 3, advancing forwards along with the working face, bending and sinking the top plate of a rear goaf 13 to form a separation space 11 at the top, starting a ground grouting pump 1 and a ground vacuum pump 2, forming a negative pressure vacuum space near the divided pumping pipe 9 by using an outer layer vacuum pipe 15, assisting the grouting grout to flow, spread and grout, continuously advancing the working face, stably performing the negative pressure vacuum grouting work, completing the separation grouting ground surface subsidence control, using a grouting barrel 18 for placing the grout and allowing a water inlet 19 to enter water, the feeding assembly 20 gets into the cement raw materials, and stirring assembly 21 is used for the stirring to the material after mixing, makes it form the thick liquid, transports out thick liquid subassembly 22 with the thick liquid through filter assembly 23 in, and carries out primary filter to the thick liquid, filters the thick liquid secondary through a thick liquid subassembly 22, guarantees that the thick liquid that gets into in vertical pump send pipe 3 does not contain impurity.
As shown in fig. 4 and 5, the filter assembly 23 includes a piston rod 231, a spring 232 is sleeved at the bottom end of the piston rod 231, a slurry collecting cylinder 233 is fixedly connected to the upper end of the spring 232, the slurry collecting cylinder 233 is sleeved with the piston rod 231, a fixing block 234 is fixedly installed at the bottom end of the slurry collecting cylinder 233, a limiting rod 235 is inserted into one side of the fixing block 234, the limiting rod 235 is fixedly connected with the slurry injecting cylinder 18, a convex ring 236 is arranged at the top end of the slurry collecting cylinder 233, a slurry outlet pipe orifice 237 is fixedly installed at the upper end of the slurry collecting cylinder 233, a slurry inlet pipe orifice 238 is fixedly installed at the middle part of the slurry collecting cylinder 233, a slurry injecting connecting pipe 239 is arranged at the lower surface of the slurry outlet pipe orifice 237, a connecting ring 2310 is arranged on the upper surface of the slurry collecting cylinder 233, and bumps 2311, 2310 and the convex ring 236 are arranged at equal distances from the circle center of the connecting ring 2310, so that the connecting ring 2310 can be extruded with the bump 2311 under the rotation, the operation of the second motor 211, the rotation of the connecting ring 2310 drives the lug 2311 to rotate, the rotation of the lug 2311 enables the convex ring 236 and the lug 2311 to extrude, so that the slurry collecting barrel 233 moves up and down, the slurry collecting barrel 233 extrudes the spring 232, slurry in the grouting barrel 18 submerges the slurry inlet pipe orifice 238 and does not submerge the top end of the grouting connecting pipe 239, thus slurry in the grouting barrel 18 enters the inner cavity of the slurry collecting barrel 233 from the slurry inlet pipe orifice 238 in the descending process of the slurry inlet pipe orifice 238, the piston rod 231 pushes the slurry in the inner cavity of the slurry collecting barrel 233 to flow into the grouting connecting pipe 239 from the port of the slurry outlet pipe orifice 237 in the descending process of the slurry collecting barrel 233, the fixing block 234 and the limiting rod 235 play a limiting role to prevent the slurry collecting barrel 233 from sliding down caused by the rotation of the lug 2311 and the convex ring 236 in the rotating contact process, and the elasticity of the spring 232 can enable the slurry collecting barrel 233 to ascend when the lug 2311 and the convex ring 236 are separated from contact in the rotating process of the connecting ring 2310, the process enables the grout in the middle of the grouting cylinder 18 to enter the grout collecting cylinder 233, and the grout accompanied with a small amount of impurities is deposited on the bottommost layer of the grouting cylinder 18, so that the grout entering the grout collecting cylinder 233 is relatively pure, and blockage during grouting is prevented.
As shown in fig. 9 and 10, the feeding assembly 20 includes a sleeve 201, a hopper 202 is fixedly mounted on the upper surface of the sleeve 201, a feeding ring 203 is sleeved on the inner cavity of the sleeve 201, a plurality of troughs 204 are formed on the outer surface of the feeding ring 203, a first motor 205 is arranged on one side of the feeding ring 203, a feeding pipe 206 is arranged at the bottom end of the sleeve 201, the feeding pipe 206 is sleeved with the grouting cylinder 18, the feeding ring 203 is driven to rotate by the operation of the first motor 205, raw materials in the hopper 202 are discharged into the troughs 204 on the feeding ring 203, so that the raw materials can be uniformly transported into the feeding pipe 206 in the rotating process of the feeding ring 203, thereby enabling each trough 204 to uniformly feed in a fixed amount, and ensuring that the raw materials are saved.
As shown in fig. 4, 6, 7 and 8, the stirring assembly 21 includes a second motor 211, a guide frame assembly 212 is disposed at a bottom side of the second motor 211, a driving ring 213 is sleeved in an inner cavity of the guide frame assembly 212, a second sliding groove 214 is disposed on an outer surface of the driving ring 213, a sliding block 215 is slidably connected in the inner cavity of the second sliding groove 214, a stirring blade 216 is fixedly connected to a bottom end of the sliding block 215, a connecting rod 217 is disposed at a bottom side of the second motor 211, the connecting rod 217 is sleeved with the driving ring 213, four second sliding grooves 214 are disposed, the guide frame assembly 212 includes a fixing frame 2121, two connecting blocks 2122 are disposed at a bottom end of the fixing frame 2121, the connecting blocks 2122 are arranged in a crossing manner, first sliding grooves 2123 are disposed at two sides of the connecting blocks 2122, the sliding block 215 is slidably connected with the first sliding grooves 2123, the connecting rod 217 is driven to rotate by operation of the second motor 211, the connecting rod 217 rotates the driving ring 213, the rotation of the driving ring 213 causes the sliding block 215 to move on the second sliding groove 214, and the sliding block 215 is connected with the first sliding groove 2123 in a sliding manner, that is, the sliding block 215 moves back and forth along the first sliding groove 2123, so that the stirring blades 216 play a stirring role in the inner cavity of the grouting barrel 18, and the stirring blades 216 have multiple groups, so that the stirring is more sufficient, and the second motor 211 can rotate forward and backward to ensure that the sliding block 215 is not jammed in the second sliding groove 214 and the first sliding groove 2123.
As shown in fig. 11, 12 and 13, the slurry outlet assembly 22 includes a slurry outlet connection pipe 221, a communication port 222 is formed at the bottom side of the slurry outlet connection pipe 221, a filter 223 is fixedly installed in the inner cavity of the slurry outlet connection pipe 221, a slip ring 224 is slidably connected to the outer surface of the bottom side of the slurry outlet connection pipe 221, a receiving box 225 is fixedly installed at the bottom end of the slip ring 224, a debris collecting box 226 is slidably connected to the inner cavity of the receiving box 225, a plurality of circular holes are formed in the outer surface of the filter 223, a connection hole is formed at the receiving box 225 where the slip ring 224 is located, the connection hole is engaged with the communication port 222, slurry flows into the slurry outlet connection pipe 221 from the slurry injection connection pipe 239, the slurry collecting cylinder 233 filters the slurry when passing through the filter 223, if the slurry contains large particles, the slurry is deposited at the bottom end, the solid particles in the slurry are intercepted by the slurry collecting cylinder 233, and the slurry flows out from the circular holes, and is filtered for a long time, solid particles accumulated at the connecting opening 222 can be accumulated, the chip collecting box 226 is enabled to be just opposite to the lower part of the connecting opening 222 through the sliding ring 224, the solid particles at the connecting opening 222 can fall into the chip collecting box 226 through the connecting hole at the moment, the sliding ring 224 slides again at the moment, the chip collecting box 226 is pulled, the chip collecting box 226 is made to be taken out from the storage box 225, the solid particles can be intensively treated at the moment, the slurry is guaranteed to be purer, the secondary filtering effect is achieved, and the blocking in the slurry injecting process is prevented.
When in use, the ground drilling position and facility arrangement position are selected according to the geological conditions of a mine and the building conditions of the ground, a proper drilling machine is selected to carry out directional drilling work according to the compressive strength of an overlying rock-soil layer 4 and the thickness of a rock stratum, a vertical drilling hole is drilled by the drilling machine, the drilling machine penetrates through a thick hard rock stratum 5 and then drills along the trend of the rock stratum to go deep into a separation space 11, shunt drilling holes are drilled at two sides, a vertical pumping pipe 3, a horizontal pumping pipe 10 and a shunt pumping pipe 9 are installed, the tightness and smoothness are connected by a water flow testing pipeline, the grout is filtered in multiple layers by a filtering assembly 23 to ensure that the injected grout does not contain impurities, the tail end of a grout outlet assembly 22 is sleeved with the upper end of the vertical pumping pipe 3, the grout in a grouting barrel 18 is subjected to primary filtration by the filtering assembly 23 and secondary filtration by the grout outlet assembly 22 to remove impurities contained in the grout, and ensure that the grout quality is high during grouting, the slurry flows into the vertical pumping pipe 3 and is pushed forward along with the working face, the top plate of the rear goaf 13 is bent and sinks, a separation space 11 is formed at the top, the ground grouting pump 1 and the ground vacuum pump 2 are started, a negative pressure vacuum space is formed near the shunting pumping pipe 9 by utilizing the outer vacuum pipe 15, the downward flow, diffusion and grouting of the grouting slurry are assisted, the working face is continuously pushed, the negative pressure vacuum grouting work is stably carried out, and the separation grouting ground surface subsidence control is completed.
In the description herein, references to the description of "one embodiment," "an example," "a specific example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed.
Claims (10)
1. The utility model provides a overburden absciss layer slip casting earth surface subsidence grouting device, includes grouting pump (1), its characterized in that, one side of grouting pump (1) is provided with vacuum pump (2), vertical pump pipe (3) have been cup jointed to one side of grouting pump (1), the bottom side of grouting pump (1) is overlying rock-soil layer (4), the bottom side of overlying rock-soil layer (4) is thick hard rock layer (5), vertical pump pipe (3) and overlying rock-soil layer (4), thick hard rock layer (5) are inserted and shut, the bottom side of thick hard rock layer (5) is provided with absciss layer space (11), the bottom side of absciss layer space (11) is provided with caving roof (12), the bottom side of caving roof (12) is provided with hydraulic support (6), the bottom side of caving roof (12) is provided with coal seam (7), one side of coal seam (7) is provided with goaf (13), the coal seam grouting device is characterized in that a coal bottom plate (8) is arranged at the bottom side of the coal seam (7), a horizontal pumping pipe (10) is arranged at the bottom side of the thick hard rock stratum (5), shunt pumping pipes (9) are arranged on two sides of the horizontal pumping pipe (10), the horizontal pumping pipe (10) comprises an inner-layer grouting pipe (14) and an outer-layer vacuum pipe (15), a supporting plate (16) is arranged on the upper surface of the upper rock-soil layer (4), a supporting rod (17) is arranged on the upper surface of the supporting plate (16), a grouting barrel (18) is arranged on the upper surface of the supporting rod (17), a water inlet (19) is fixedly arranged on one side of the grouting barrel (18), a feeding assembly (20) is arranged on one side of the grouting barrel (18), a stirring assembly (21) is arranged at the upper end of the grouting barrel (18), a slurry outlet assembly (22) is arranged at the bottom end of the grouting barrel (18), and the slurry outlet assembly (22) is sleeved with the vertical pumping pipe (3), the slurry outlet assembly (22) is sleeved with the vertical pumping pipe (3), and a filtering assembly (23) is arranged in the inner cavity of the grouting barrel (18);
the filter assembly (23) comprises a piston rod (231), a spring (232) is sleeved at the bottom end of the piston rod (231), a slurry collecting barrel (233) is fixedly connected to the upper end of the spring (232), the slurry collecting barrel (233) is sleeved with the piston rod (231), a fixing block (234) is installed at the bottom end of the slurry collecting barrel (233), a limiting rod (235) is inserted into one side of the fixing block (234), the limiting rod (235) is fixedly connected with the slurry injecting barrel (18), a convex ring (236) is arranged at the top end of the slurry collecting barrel (233), a slurry outlet (237) is fixedly installed at the upper end of the slurry collecting barrel (233), a slurry inlet (238) is fixedly installed at the middle part of the slurry collecting barrel (233), a slurry injecting connecting pipe (239) is arranged on the lower surface of the slurry outlet (237), a connecting ring (2310) is arranged on the upper surface of the slurry collecting barrel (233), the lower surface of the connecting ring (2310) is fixedly provided with a convex block (2311), and the distances from the connecting ring (2310) and the convex ring (236) to the circle center of the connecting ring (2310) are equal.
2. The overburden bed slip casting surface subsidence grouting device of claim 1, wherein the feeding assembly (20) comprises a sleeve (201), a hopper (202) is fixedly mounted on the upper surface of the sleeve (201), a feeding ring (203) is sleeved in an inner cavity of the sleeve (201), a plurality of material grooves (204) are formed in the outer surface of the feeding ring (203), a first motor (205) is arranged on one side of the feeding ring (203), a feeding pipe (206) is arranged at the bottom end of the sleeve (201), and the feeding pipe (206) is sleeved with the slip casting barrel (18).
3. The overburden bed separation grouting earth surface subsidence grouting device according to claim 1, wherein the stirring assembly (21) comprises a second motor (211), a guide frame assembly (212) is arranged on the bottom side of the second motor (211), a driving ring (213) is sleeved in an inner cavity of the guide frame assembly (212), a second sliding groove (214) is formed in the outer surface of the driving ring (213), a sliding block (215) is connected to the inner cavity of the second sliding groove (214) in a sliding manner, stirring blades (216) are fixedly connected to the bottom end of the sliding block (215), and a connecting rod (217) is arranged on the bottom side of the second motor (211).
4. The overburden bed slip casting surface subsidence grouting device according to claim 3, wherein the connecting rod (217) and the driving ring (213) are sleeved, the number of the second sliding grooves (214) is four, the guide frame assembly (212) comprises a fixed frame (2121), two connecting blocks (2122) are arranged at the bottom end of the fixed frame (2121), the connecting blocks (2122) are arranged in a crossed mode, first sliding grooves (2123) are formed in two sides of each connecting block (2122), and the sliding blocks (215) are connected with the first sliding grooves (2123) in a sliding mode.
5. The overlying strata separation layer grouting earth surface subsidence grouting device of claim 1, wherein the grout outlet assembly (22) comprises a grout outlet connecting pipe (221), a communication port (222) is formed in the bottom side of the grout outlet connecting pipe (221), a filter disc (223) is fixedly installed in the inner cavity of the grout outlet connecting pipe (221), a sliding ring (224) is slidably connected to the outer surface of the bottom side of the grout outlet connecting pipe (221), a storage box (225) is fixedly installed at the bottom end of the sliding ring (224), and a scrap collecting box (226) is slidably connected to the inner cavity of the storage box (225).
6. The overlying strata separation layer grouting and surface subsidence grouting device as claimed in claim 5, wherein a plurality of round holes are formed in the outer surface of the filter plate (223), a connecting hole is formed in a storage box (225) where the sliding ring (224) is located, and the connecting hole is clamped with the communication port (222).
7. A method for controlling the surface subsidence of the overburden bed separation grouting, which is executed by the device for controlling the surface subsidence of the overburden bed separation grouting according to any one of claims 1 to 6, and is characterized by comprising the following steps of:
s1, selecting a ground drilling position and a facility arrangement position according to the mine geological conditions and the ground building conditions, and selecting a proper drilling machine to perform directional drilling work according to the compressive strength and the rock stratum thickness of the overlying rock-soil layer (4);
s2, drilling a vertical borehole by using a drilling machine, drilling the vertical borehole along the direction of the rock stratum after penetrating through the thick hard rock stratum (5), penetrating into the separation space (11), and drilling a shunt borehole at two sides;
s3, installing a vertical pumping pipe (3), a horizontal pumping pipe (10) and a shunt pumping pipe (9), and testing the tightness and smoothness of the pipeline connection by using water flow;
s4, filtering the slurry in multiple layers through the filtering assembly (23) to ensure that the injected slurry does not contain impurities, and sleeving the tail end of the slurry outlet assembly (22) and the upper end of the vertical pumping pipe (3) to enable the slurry to flow into the vertical pumping pipe (3);
s5, advancing forwards along with the working face, bending and sinking the top plate of the rear goaf (13), forming a separation space (11) at the top, starting a ground grouting pump (1) and a ground vacuum pump (2), and forming a negative pressure vacuum space near a shunting pumping pipe (9) by utilizing an outer layer vacuum pipe (15) to assist in downward flow, diffusion and grouting of grouting slurry;
and S6, continuously propelling the working face, and stably performing negative pressure vacuum grouting to finish the control of the surface subsidence of the separated layer grouting.
8. The method for controlling overburden separation grouting surface subsidence as recited in claim 7, wherein said vertical pumping pipe, horizontal pumping pipe and shunt pumping pipe are provided with a switch valve at each connection node for controlling slurry filling position.
9. The method for controlling overburden strata separation grouting surface subsidence as claimed in claim 7, wherein the overlong vertical pumping pipe, the horizontal pumping pipe and the shunt pumping pipe are of a double-layer pipe sleeve structure, the inner layer grouting pipe is used for grouting slurry to flow, and the outer layer vacuum pipe is connected with a ground vacuum pump and is used for forming a negative pressure environment in a separation space.
10. The method for controlling the ground surface subsidence through the overlying strata separation layer grouting according to claim 7, wherein the grouting slurry aggregate particles are 3-10 mm, the slump is 50-110 mm, the horizontal pumping pipe and the shunt pumping pipe are prefabricated buried pipes, and grouting is performed in time after a working face is pushed so as to prevent the ground surface from sinking.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210023068.6A CN114351685A (en) | 2022-01-10 | 2022-01-10 | Overlying strata separation layer grouting surface subsidence control method and grouting device thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210023068.6A CN114351685A (en) | 2022-01-10 | 2022-01-10 | Overlying strata separation layer grouting surface subsidence control method and grouting device thereof |
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| CN114351685A true CN114351685A (en) | 2022-04-15 |
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| CN202210023068.6A Withdrawn CN114351685A (en) | 2022-01-10 | 2022-01-10 | Overlying strata separation layer grouting surface subsidence control method and grouting device thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023213045A1 (en) * | 2022-05-06 | 2023-11-09 | 河南理工大学 | Mining-induced high-level fractured space grouting repair method |
| GB2621642A (en) * | 2022-05-06 | 2024-02-21 | Univ Henan Polytechnic | Mining-induced high-level fractured space grouting repair method |
-
2022
- 2022-01-10 CN CN202210023068.6A patent/CN114351685A/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023213045A1 (en) * | 2022-05-06 | 2023-11-09 | 河南理工大学 | Mining-induced high-level fractured space grouting repair method |
| GB2621642A (en) * | 2022-05-06 | 2024-02-21 | Univ Henan Polytechnic | Mining-induced high-level fractured space grouting repair method |
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Application publication date: 20220415 |