CN220154432U - Medium deep buried coal seam roof modified water-resisting layer stability simulation test device - Google Patents
Medium deep buried coal seam roof modified water-resisting layer stability simulation test device Download PDFInfo
- Publication number
- CN220154432U CN220154432U CN202320159373.8U CN202320159373U CN220154432U CN 220154432 U CN220154432 U CN 220154432U CN 202320159373 U CN202320159373 U CN 202320159373U CN 220154432 U CN220154432 U CN 220154432U
- Authority
- CN
- China
- Prior art keywords
- water
- coal seam
- grouting
- frame
- medium
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 239000003245 coal Substances 0.000 title claims abstract description 69
- 238000012360 testing method Methods 0.000 title claims abstract description 61
- 238000004088 simulation Methods 0.000 title claims abstract description 29
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 92
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 72
- 239000010959 steel Substances 0.000 claims abstract description 72
- 239000011435 rock Substances 0.000 claims abstract description 36
- 239000000463 material Substances 0.000 claims abstract description 19
- 238000000034 method Methods 0.000 claims abstract description 12
- 230000008569 process Effects 0.000 claims abstract description 11
- 238000009412 basement excavation Methods 0.000 claims abstract description 10
- 230000006378 damage Effects 0.000 claims abstract description 9
- 239000011521 glass Substances 0.000 claims description 27
- 230000003014 reinforcing effect Effects 0.000 claims description 24
- 239000002002 slurry Substances 0.000 claims description 14
- 239000011148 porous material Substances 0.000 claims description 8
- 239000002689 soil Substances 0.000 claims description 8
- 238000003466 welding Methods 0.000 claims description 6
- 238000005336 cracking Methods 0.000 claims description 5
- 238000007789 sealing Methods 0.000 claims description 5
- 238000012986 modification Methods 0.000 abstract description 13
- 230000004048 modification Effects 0.000 abstract description 13
- 238000011161 development Methods 0.000 abstract description 9
- 238000011084 recovery Methods 0.000 abstract description 2
- 239000010410 layer Substances 0.000 description 28
- 238000005065 mining Methods 0.000 description 9
- 238000012544 monitoring process Methods 0.000 description 5
- 230000007246 mechanism Effects 0.000 description 4
- 238000011160 research Methods 0.000 description 4
- 238000005520 cutting process Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000005553 drilling Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000013401 experimental design Methods 0.000 description 2
- 239000004519 grease Substances 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 229920001296 polysiloxane Polymers 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 239000008400 supply water Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000013480 data collection Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000000877 morphologic effect Effects 0.000 description 1
- 230000000452 restraining effect Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Landscapes
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The utility model discloses a stability simulation test device for a modified water-resisting layer of a top plate of a medium-deep buried coal seam, wherein a coal-line stratum structure model similar material is filled in a test steel frame, and the test steel frame is divided into a lower coal seam area and an upper overlying strata; the top of the test steel frame is communicated with a water supply system, an electric excavation device is arranged on the side face of the coal bed area at the lower part, and the precise grouting system and the artificial presplitting system enter the overlying strata at the upper part through grouting pipes respectively. The sensor is connected with the data acquisition and control center; the top of the test steel frame is communicated with a water supply system; under the conditions of a high-pressure water supply system and lateral confining pressure, the data acquisition and control center acquires simulation test data of the water-resisting layer damage of the top plate modification and the water-gushing process of the working face of the medium-deep buried coal seam in a closed environment, and realizes the whole process simulation of the development form of the top plate water-guiding fracture zone and the water-gushing process of the water-bearing layer during the recovery of the water-rich rock coal seam.
Description
Technical Field
The utility model belongs to the technical field of indoor physical similarity simulation tests, and relates to a stability simulation test device for a modified water-resistant layer of a top plate of a medium-deep buried coal seam.
Background
Along with the increasing exhaustion of the eastern coal resources in China, the mining center of gravity of the coal resources starts to gradually shift to the western part and the deep part. Once the mining fissure generated by the high-strength mining damage of the overlying strata structure of the working face is developed to the aquifer, the mining fissure is hydraulically continuous with the working face and the goaf, so that the water inflow of the working face is increased rapidly, the working face water burst disaster is caused, and the mine safety production is seriously threatened. Therefore, the research on the development height of the upstream water guiding fracture zone of coal seam exploitation, the stability of the water-containing (water-resisting) layer and the prevention and treatment measures thereof has important significance. Aiming at the sudden water gushing disasters of the top plate of the dwarf coal field in the northern Shaanxi, the advanced drainage before stoping of the working face and the presplitting grouting modification of the top plate before stoping can effectively inhibit the development ranges of the water guide fracture zone and the plastic zone, and the water gushing amount and the occurrence probability of the sudden water gushing disasters of the working face are reduced.
The simulation experiment of the similar materials is one of important research means in the field of mining engineering, has a relatively mature similar theory, and has great difficulty in the physical similar simulation research of the development of the water-conducting fracture zone of the coal seam, the stability of the water-resisting layer and the water-inflow rule of the roof under the condition of the water-rich roof due to the complexity of the coal measure stratum structure and the water-rock interaction mechanism and the slow progress in the aspects of solid-liquid coupling similar materials and the similar theory at present.
Disclosure of Invention
In order to solve the defects in the prior art, the utility model aims to provide the device for simulating the stability of the top plate modified water-resisting layer of the medium-deep buried coal seam, which can simulate the development form of the top plate water-guiding fracture zone and the whole water-bearing layer water gushing process during the recovery of the water-rich rock coal seam and provides support for researching the stability of the top plate modified water-resisting layer and realizing the safe exploitation of the working face of the water-rich top plate.
The utility model is realized by the following technical scheme.
The utility model provides a stability simulation test device for a modified water-resisting layer of a top plate of a medium-deep buried coal seam, which comprises a test steel frame, a data acquisition and control center, an electric excavation device, a precise grouting system, a manual pre-cracking system and a water supply system.
The test steel frame is internally filled with a coal measure stratum structure model similar material, and a sensor connected with a data acquisition and control center is arranged in the coal measure stratum structure model similar material; the test steel frame is divided into a lower coal bed area and an upper overburden stratum (containing a pre-splitting modified rock stratum); the top of the test steel frame is communicated with a water supply system, an electric excavation device is arranged on the side face of the coal bed area at the lower part, and the precise grouting system and the artificial presplitting system enter the overlying strata at the upper part through grouting pipes respectively. Under the conditions of a high-pressure water supply system and lateral confining pressure, the data acquisition and control center acquires simulation test data of the water-resisting layer damage of the medium-deep buried coal seam in the modification of the top plate in the closed environment and the water-gushing process of the working face.
Preferably, the test steel frame comprises a bottom frame, an upper frame and a top cover, wherein the bottom frame and the upper frame are formed by welding steel plates and sectional materials.
Preferably, the upper frame comprises a lower coal seam area and a middle reinforcing frame; the coal bed area is located the chassis top, and the coal bed area passes through detachable channel-section steel to be connected on experimental steelframe.
Preferably, the reinforcing frame comprises a steel frame upper frame and a reinforcing component, the reinforcing component is formed by welding steel bars and steel bars, the middle part of the edge of the reinforcing component is divided into an upper layer and a lower layer, and the reinforcing component is connected with the connecting bolt through a connecting flange.
Preferably, U-shaped grooves are formed in the periphery of the front face and the rear face of the upper frame of the steel frame, and rubber sealing strips are paved in the grooves.
Preferably, the inner side of the reinforcing frame is sequentially provided with a section steel a and a section steel b, and the inner side of the section steel b is provided with an organic glass plate.
Preferably, the top cover is arranged above the organic glass plate, and the top cover is respectively provided with an air outlet and a water inlet.
Preferably, sensor connecting holes are arranged on the surface of the organic glass plate on the front surface of the test steel frame at equal intervals, and a surrounding rock pressure sensor, a pore water pressure sensor, a water flow sensor and a soil moisture sensor are arranged in the model and are connected with the data acquisition and control center after being sealed through the connecting holes.
Preferably, the precision grouting system comprises a slurry stirrer, a precision grouting pump and a grouting pipe; the manual presplitting system comprises a high-pressure air pump and a barometer, wherein the slurry stirrer is communicated with a precise grouting pump, and the precise grouting pump and the high-pressure air pump are communicated into the presplitting modified rock stratum of the overlying strata of the test area through grouting pipes.
Due to the adoption of the technical scheme, the utility model has the following beneficial effects:
1. the test steel frame adopts the front and rear side organic glass plates and the top cover, so that the whole test process is ensured to be carried out under the airtight condition.
2. And (3) adopting a mode of filling coal-based stratum simulation materials in the test steel frame, and performing visual simulation test on the top plate modified water-resisting layer damage and the working surface water-flushing process in a closed manner under the conditions of a high-pressure water supply system and lateral confining pressure.
3. And the surrounding rock pressure sensor, the water flow sensor and the soil moisture sensor are respectively arranged at different levels in the test model, so that the real-time monitoring of the surrounding rock pressure, the pore water pressure, the flow and the surrounding rock humidity change parameters is realized.
4. And obtaining a damage rule of a water-resistant layer on the coal bed and a water-gushing mechanism of a working surface under the top plate pre-cracking modification condition by acquiring or quantitatively describing and analyzing the development rule of the water-conducting fracture zone of the coal bed under the water-rich top plate condition, and evaluating the grouting modification effect.
The utility model can effectively recognize and reveal the development rule of the water-guiding fracture zone of the coal bed, the stability of the roof modification water-resisting layer and the water-gushing mechanism of the working face under the condition of the water-rich roof under the mining disturbance effect, and provides a theoretical basis for further deep research of roof grouting modification technology and mine roof flood prevention.
Drawings
The accompanying drawings, which are included to provide a further understanding of the utility model and constitute a part of this specification, are incorporated in and constitute a part of this specification and do not limit the utility model in any way, and in which:
FIG. 1 is a schematic diagram of the whole device for simulating the stability of a modified water-resistant layer of a top plate of a deep buried coal seam in the practical system;
fig. 2 (a) and fig. 2 (b) are schematic diagrams of the steel frame structure of the present utility model test;
fig. 3 is a schematic view of a main frame of the practical test steel frame.
In the figure: 1-an exhaust port; 2-top cover; 3-a water inlet; 4-organic glass plate; 5-connecting bolts; 6-connecting flanges; 7-section steel b; 8-section steel a; 9-a sensor connection hole; 10-removable channel steel; 11-lower coal seam area; 12-underframe; 13-a middle reinforcing frame; 14-test steel frame; 15-an air pressure control cabinet; 16-a high-pressure water tank; 17, a data acquisition and control center; 18-an electric excavation device; 19-a flow meter; 20-valve; 21-a water inlet pipeline; 22-pre-fracturing the modified formation; 23-grouting pipe; 24-grouting and drilling; 25-a precision grouting pump; 26-a slurry mixer; 27-a high-pressure air pump; 28-rubber sealing strips; 29-U-shaped groove.
Detailed Description
The present utility model will now be described in detail with reference to the drawings and the specific embodiments thereof, wherein the exemplary embodiments and descriptions of the present utility model are provided for illustration of the utility model and are not intended to be limiting.
As shown in FIG. 1, the simulation test device for the stability of the modified water-resisting layer of the top plate of the medium-deep buried coal seam provided by the embodiment of the utility model comprises a test steel frame 14, a data acquisition and control center 17, an electric excavation device 18, a precise grouting system, a manual pre-cracking system and a top water supply system. The test steel frame 14 is internally filled with a coal measure stratum structure model similar material, and a sensor connected with the data acquisition and control center 17 is arranged in the coal measure stratum structure model similar material; the test steel frame 14 is divided into a lower coal bed zone 11 and an upper overburden stratum, and the upper overburden stratum contains a presplitting modified rock stratum 22; the top of the test steel frame 14 is communicated with a water supply system, the lower coal seam area 11 is communicated with an electric excavating device 18, and the upper overlying strata are communicated with a precise grouting system and an artificial presplitting system.
As shown in fig. 2 (a), 2 (b) and 3, the main structure of the test steel frame 14 includes a bottom frame 12 and an upper frame, and the bottom frame 12 and the upper frame are formed by welding steel plates and profiles.
The upper frame is integrally divided into three parts, including a lower coal seam area 11, a middle reinforcing frame 13 and an upper top cover 2; the lower coal seam area 11 is located above the undercarriage 12, and the lower coal seam area 11 is secured to the test steel frame 14 with removable channel steel 10. The middle reinforcing frame 13 comprises a steel frame upper frame and reinforcing components, wherein the reinforcing components are formed by welding steel bars and steel bars, and the reinforcing components comprise 3 steel bars which are welded on the steel frame upper frame at equal intervals along the vertical direction and 2 steel bars which are welded on the steel frame upper frame at equal intervals along the horizontal direction; the middle part of the reinforcing component is divided into an upper layer and a lower layer, and the two layers are fastened and connected by using a connecting flange 6 and a connecting bolt 5. The inner side of the middle reinforcing frame 13 is sequentially provided with a section steel a8 and a section steel b7, and the inner side of the section steel b7 is provided with an organic glass plate 4. U-shaped grooves 29 are formed in the periphery of the front face and the rear face of the upper frame, and rubber sealing strips 28 are paved inside the U-shaped grooves. The top cover 2 is arranged above the organic glass plate 4, and the top cover 2 is a top cover welded by an arc-shaped steel plate. The top cover 2 is respectively provided with an air outlet 1 and a water inlet 3.
When the front and rear organic glass plates 4 are installed, the section steel b7 is installed on the upper frame in an end-to-end mode, then the organic glass plates 4 coated with waterproof silicone grease on the inner side are covered on the rubber sealing strips 28, so that the organic glass plates are flush with the section steel b7, then one side of the section steel a8 is fastened on the section steel b7, and the other side cover is arranged on the organic glass plates, so that the organic glass plates and the model are integrally sealed.
The connection mode of the three parts of the upper frame of the test steel frame is as follows: the bottom detachable channel steel 10 and the top cover 2 are respectively connected with the connecting flange 6 on the middle reinforcing frame 13, so that the stability of the whole structure in the test process is ensured.
The front and rear organic glass plates 4 are respectively divided into two layers; in the test model assembling process, firstly, the detachable channel steel 10, the lower organic glass plate 4 and the lower reinforcing member of the lower coal seam area 11 are installed, and after the simulation material is paved on the top of the lower glass plate, the upper glass plate and the upper reinforcing member are installed, and the model is continuously assembled.
In one embodiment, sensor connecting holes 9 are arranged on the surface of the front organic glass plate 4 of the test steel frame 14 at equal intervals of 100mm, surrounding rock pressure, pore water pressure, water flow sensor and soil moisture sensor are arranged in the model, and the model is connected with the data acquisition and control center 17 after being sealed through the connecting holes.
The sensor arrangement positions are: pore water pressure and water flow sensors are arranged in the water-containing layer at equal intervals of 100mm, and the size of the water pressure sensor is that Φ 2.5mm by 5mm, the measuring range is-1.00 Kp-5.00Kpa, and the precision is +/-0.1% FS; the water flow sensor has the size of 115x100x19 mm and the flow of 5.00-25.00mm 3 。
The surrounding rock pressure sensors are horizontally arranged in the overburden layer of the coal seam at equal intervals of 100 mm; the surrounding rock pressure sensor is a cylinder with the thickness of 2.54mm multiplied by 3.77mm, and the measuring range is-10.00 KPa-6.00Mpa; the measuring range of the soil moisture sensor is 0-100%, and the precision is +/-3%.
The precise grouting system comprises a slurry stirrer 26, a precise grouting pump 25 and a grouting pipe 23; the manual presplitting system comprises a high-pressure air pump 27 and an air pressure gauge, wherein a slurry stirrer 26 is communicated with a precise grouting pump 25, gas pressurized by the high-pressure air pump 27 is the same as a line for grouting modification of a rock stratum, and the high-pressure air pump 27 and the air pressure gauge jointly use a grouting pipe positioned in the middle of the presplitting modified rock stratum to pump high-pressure gas or slurry into the physical similar model, and the precise grouting pump 25 and the high-pressure air pump 27 are communicated into the presplitting modified rock stratum 22 of a test area of the interlayer of the organic glass plate 4 through the grouting pipe 23.
The precise grouting pump 25 can provide stable grouting pressure between 0 and 4.00MPa, and grouting flow is 6 to 12.6L/min; the precision grouting pump pressurizes the fully stirred slurry in the slurry stirrer 26, and the slurry is injected into the pre-cracked modified rock stratum 22 through the grouting pipe 23 and the grouting drill hole 24; the grouting pipe 23 has a length of 2000mm, and grouting holes are arranged on the surface of the grouting pipe at equal intervals of 200 mm.
The high-pressure water supply system comprises an air pressure control cabinet 15, a high-pressure water tank 16 and a water outlet pipeline which is respectively communicated with a water inlet pipeline 21 and a test steel frame 14, wherein a valve 20 is arranged on the water inlet pipeline 21, and a flowmeter 19 is arranged on the water outlet pipeline. The high-pressure water tank 16 is connected with an air pressure control cabinet 15.
The electric excavation device 18 enters from a reserved hole on the left side wall of the bottom coal seam area by using a speed reducer and a special drill bit, and the coal seam is mined by using a large-stroke spiral groove on the special drill bit. The drill bit walking speed of the electric excavating device is 3.0mm/s, the motor power is 3.0KW, the diameter of the saw blade is 30.00-200.00mm, and the maximum cutting depth is 2500mm.
The data acquisition and control center 17 comprises a data acquisition box, a computer and a data real-time acquisition monitoring unit. Under the conditions of a high-pressure water supply system and lateral confining pressure, the data acquisition and control center acquires simulation test data of the water-resisting layer damage of the top plate modification of the medium-deep buried coal seam in the closed environment and the water-gushing process of the working face.
Based on the above embodiment provided by the device for simulating stability of the modified water-resistant layer of the top plate of the medium-deep buried coal seam, the embodiment also provides a method for simulating stability of the modified water-resistant layer of the top plate of the medium-deep buried coal seam in the north of Shaanxi, which comprises the following specific test steps:
step 1, according to geological and hydrological conditions of deep buried fully mechanized mining working surfaces in the north of Shaanxi, selecting and parameter proportioning of similar materials of each rock stratum are determined according to drilling columns;
step 2, assembling a simulation test device, restraining the front side and the rear side of the model by adopting organic glass plates 4, layering similar materials according to test requirements, tamping, and cutting cracks along the trend of the coal seam at equal intervals of 30-50mm in each layer; surrounding rock pressure sensors and soil moisture sensors are respectively arranged at different levels and equal intervals in a coal measure stratum under a model aquifer, water flow and pore water pressure sensors are arranged at the model aquifer, and are led out from sensor connecting holes 9 on an organic glass plate 4 at the front side of a test steel frame after being sealed, are connected with a data collector and are connected with a data collection and control center 17;
step 3, after the model is assembled, the front and rear side organic glass plates 4 are disassembled, after the stratum structure model is naturally dried to reach the strength of an experimental design scheme, the organic glass plates 4 are reinstalled, the top cover 2 is closed, and the water outlet valve 20 of the end high-pressure water supply system is opened to supply water to the aquifer so that the aquifer can simulate the preset water pressure and flow;
step 4, the electric excavation device 18 is used for mining the lower coal seam area 11 according to a preset propelling distance and speed, and surrounding rock pressure sensors, water flow sensors and soil moisture sensors which are arranged in the model are used for monitoring and collecting rock stratum stress, pore water pressure, water flow and humidity data in real time;
step 5, after the stoping is finished, determining the final development height of the water guide fracture zone according to the monitoring data and the coverage rock damage morphological range, acquiring or quantitatively describing the water inflow rule of the top plate of the working face, and comprehensively determining the pre-splitting modified rock stratum 22 of the bedrock on the coal bed;
step 6, re-paving similar simulation materials of each rock stratum, paving a grouting pipe 23 in the middle of the layer of the pre-splitting modified rock stratum along the trend of the lower coal bed area 11 when the similar simulation materials are paved to the pre-splitting modified rock stratum 22, and cutting cracks along the coal bed trend at equal intervals of 3-5cm after the similar simulation materials are tamped;
step 7, continuing to lay the model, after the experimental model is assembled, disassembling the front and rear organic glass plates 4, after the stratum structure model is naturally dried to reach the strength of the experimental design scheme, smearing waterproof silicone grease on the inner wall of the experimental steel frame to prevent water leakage after the high-pressure water supply system is started, and installing the front and rear organic glass plates 4;
step 8, before the stoping of the lower coal bed zone 11, carrying out artificial presplitting on the presplitting modified rock stratum 22, injecting air into the presplitting modified rock stratum 22 through an grouting pipe 23 by using a high-pressure air pump 26 under constant pressure, wherein when the reading of a barometer changes, the artificial fissures are formed in the presplitting modified rock stratum 22, so that the air leaks out;
step 9, adding materials such as slurry, water and the like into a slurry stirrer 26 after the artificial pre-cracking is finished, uniformly stirring, conveying the materials to a precise grouting pump 25 from a pipeline, grouting the pre-cracked modified rock stratum 22 along a grouting pipe 23 according to a certain grouting pressure and flow, and closing the precise grouting pump 25 to stop grouting after the slurry is fully diffused and filled in the artificial cracks;
step 10, after the modified rock stratum is naturally dried, installing a top cover 2, and opening a water outlet valve 20 of a high-pressure water supply system at the end part to supply water to the aquifer so as to enable the aquifer to simulate preset water pressure and flow;
step 11, starting an electric excavation device 18, mining a lower coal seam area 11 according to a preset propelling distance and speed, and monitoring and collecting rock stratum stress, pore water pressure, water flow and humidity data in real time by using a surrounding rock pressure sensor, a water flow sensor and a soil moisture sensor which are arranged in the model;
and 12, after the stoping is finished, comparing the water inflow and water filling mechanisms of the working face before and after the modification of the roof water-resisting layer according to the acquired data and the coverage rock destruction form range, analyzing and comparing the development ranges of the saddle-shaped plastic area and the water guide fracture zone before and after the modification of the roof, and judging whether the aims of reducing the release of the underground water static reserves and blocking the supply of the dynamic reserves during the mining of the working face are achieved.
The utility model is not limited to the above embodiments, and based on the technical solution disclosed in the utility model, a person skilled in the art may make some substitutions and modifications to some technical features thereof without creative effort according to the technical content disclosed, and all the substitutions and modifications are within the protection scope of the utility model.
Claims (9)
1. The device is characterized by comprising a test steel frame, a data acquisition and control center, an electric excavation device, a precision grouting system, a manual pre-cracking system and a water supply system;
the test steel frame is internally filled with a coal measure stratum structure model similar material and is divided into a lower coal bed area and an upper overlying strata; sensors connected with a data acquisition and control center are arranged in the coal measure stratum structure model similar materials;
the top of the test steel frame is communicated with a water supply system, an electric excavation device is arranged on the side face of the coal bed area at the lower part, and the precise grouting system and the artificial presplitting system enter an upper overlying strata through grouting pipes respectively;
under the conditions of a high-pressure water supply system and lateral confining pressure, the data acquisition and control center acquires simulation test data of the top plate modified water-resisting layer damage and the working face water-gushing process of the medium-deep buried coal seam in a closed environment.
2. The simulation test device for stability of a modified water-resistant layer of a top plate of a medium-deep buried coal seam according to claim 1, wherein the test steel frame comprises a bottom frame, an upper frame and a top cover, and the bottom frame and the upper frame are formed by welding steel plates and profiles.
3. The simulation test device for the stability of the modified water-resistant layer of the top plate of the medium-deep buried coal seam according to claim 2, wherein the upper frame comprises a lower coal seam area, a middle reinforcing frame and an upper top cover;
the coal bed area is located the chassis top, and the coal bed area passes through detachable channel-section steel to be connected on experimental steelframe.
4. The simulation test device for stability of a modified water-resistant layer of a top plate of a medium-deep buried coal seam according to claim 3, wherein the reinforcing frame comprises a steel frame upper frame and a reinforcing component, the reinforcing component is formed by welding steel bars and steel bars, the middle part of the reinforcing component is divided into an upper layer and a lower layer, and the upper layer and the lower layer are connected through connecting flanges and connecting bolts.
5. The simulation test device for the stability of the modified water-resistant layer of the top plate of the medium-deep buried coal seam, which is disclosed in claim 4, is characterized in that U-shaped grooves are formed around the front and rear faces of the upper frame of the steel frame, and rubber sealing strips are paved in the grooves.
6. The simulation test device for the stability of the modified water-resistant layer of the medium-deep buried seam roof according to claim 3, wherein the section steel a and the section steel b are sequentially arranged on the inner side of the reinforcing frame, and the organic glass plate is arranged on the inner side of the section steel b.
7. The simulation test device for stability of a modified water-resistant layer of a top plate of a medium-deep buried coal seam according to claim 6, wherein the top cover is arranged above the organic glass plate, and the top cover is provided with an air outlet and a water inlet respectively.
8. The simulation test device for the stability of the modified water-resistant layer of the medium-deep buried seam roof according to claim 6, wherein sensor connecting holes are arranged on the surface of the organic glass plate on the front surface of the test steel frame at equal intervals, and a surrounding rock pressure sensor, a pore water pressure sensor, a water flow sensor and a soil moisture sensor are arranged in the test steel frame and are connected with a data acquisition and control center after being sealed through the connecting holes.
9. The simulation test device for the stability of the modified water-resistant layer of the top plate of the medium-deep buried coal seam according to claim 1, wherein the precise grouting system comprises a slurry stirrer, a precise grouting pump and a grouting pipe; the manual presplitting system comprises a high-pressure air pump and a barometer, wherein the slurry stirrer is communicated with a precise grouting pump, and the precise grouting pump and the high-pressure air pump are communicated into the presplitting modified rock stratum covered on the coal bed in the test area through grouting pipes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320159373.8U CN220154432U (en) | 2023-02-02 | 2023-02-02 | Medium deep buried coal seam roof modified water-resisting layer stability simulation test device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320159373.8U CN220154432U (en) | 2023-02-02 | 2023-02-02 | Medium deep buried coal seam roof modified water-resisting layer stability simulation test device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220154432U true CN220154432U (en) | 2023-12-08 |
Family
ID=89016847
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320159373.8U Active CN220154432U (en) | 2023-02-02 | 2023-02-02 | Medium deep buried coal seam roof modified water-resisting layer stability simulation test device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220154432U (en) |
-
2023
- 2023-02-02 CN CN202320159373.8U patent/CN220154432U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Zheng et al. | Coalbed methane emissions and drainage methods in underground mining for mining safety and environmental benefits: A review | |
| Zhang et al. | Enhancement of gas drainage efficiency in a special thick coal seam through hydraulic flushing | |
| CN103089295B (en) | Coal bed gas extraction test method in multiple seam unitized production process | |
| CN101813002B (en) | Coal seam pre-splitting method based on gas extraction | |
| CN106194244B (en) | Lower permeability seam liquid phase CO2Phase transformation fracturing is anti-reflection grid type gas pumping method | |
| CN103114870B (en) | Multi-field coupling coal bed methane extraction physical simulation testing system | |
| CN107389898A (en) | Dynamic current Flooding in Borehole consolidation grouting Diffusion Law visual Simulation experimental provision and method | |
| CN109162731B (en) | Water inrush grouting treatment method for deep mining of iron mine area | |
| CN103089254B (en) | Multi-scenarios method coal-bed gas exploitation physical simulation experiment pipe | |
| CN112392431A (en) | Technology for preventing and treating water damage of coal seam roof by dynamic pressure-maintaining grouting and plugging of horizontal long drill hole in mining fracture zone | |
| CN204327082U (en) | A kind of coal measure strata structure large scale fracture seepage physical simulation experimental rig | |
| CN104458534A (en) | Simulation test device and simulation test method for coal measure strata fracture seepage under loading and unloading conditions | |
| CN102134967A (en) | Construction method of consolidating horizontal directional drilling hole by grouting coal seam baseboard | |
| CN103114827A (en) | Multi-field coupling coal bed methane extraction simulation testing method | |
| CN111042831A (en) | Grouting reinforcement transformation method for coal seam floor limestone confined aquifer | |
| CN104237025A (en) | Mining fracturing simulating test method for sealing drilling | |
| CN113622913B (en) | Deformation control method for mining tunnel surrounding rock integrated with underground and up-down tunnel by full-caving method | |
| CN107729700A (en) | Parameter determination method for coal seam gas extraction drilling, slotting and sealing | |
| CN107816365A (en) | A kind of quick-fried pumping integration anti-burst method of coal seam drilling | |
| CN112377243B (en) | Outburst prevention construction method for coal and gas outburst tunnel | |
| Qin et al. | Optimization of abandoned gob methane drainage through well placement selection | |
| Niu et al. | Gas extraction mechanism and effect of ultra-high-pressure hydraulic slotting technology: A case study in Renlou coal mine | |
| Huang et al. | Multi-step combined control technology for karst and fissure water inrush disaster during shield tunneling in spring areas | |
| Zhang et al. | Research on the development of hydraulic flushing caverning technology and equipment for gas extraction in soft and low permeability tectonic coal seams in China | |
| CN220154432U (en) | Medium deep buried coal seam roof modified water-resisting layer stability simulation test device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |