CN114562329B - Non-closed overlying strata grouting, filling and isolating method - Google Patents
Non-closed overlying strata grouting, filling and isolating method Download PDFInfo
- Publication number
- CN114562329B CN114562329B CN202210340440.6A CN202210340440A CN114562329B CN 114562329 B CN114562329 B CN 114562329B CN 202210340440 A CN202210340440 A CN 202210340440A CN 114562329 B CN114562329 B CN 114562329B
- Authority
- CN
- China
- Prior art keywords
- filling
- grouting
- isolation
- mining
- bag
- 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
- 238000000034 method Methods 0.000 title claims abstract description 27
- 238000005065 mining Methods 0.000 claims abstract description 74
- 238000002955 isolation Methods 0.000 claims abstract description 67
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 29
- 238000005553 drilling Methods 0.000 claims abstract description 27
- 239000002002 slurry Substances 0.000 claims abstract description 22
- 238000002347 injection Methods 0.000 claims abstract description 13
- 239000007924 injection Substances 0.000 claims abstract description 13
- 238000011161 development Methods 0.000 claims abstract description 11
- 239000000463 material Substances 0.000 claims abstract description 9
- 238000011084 recovery Methods 0.000 claims abstract description 8
- 238000007789 sealing Methods 0.000 claims description 10
- 238000007599 discharging Methods 0.000 claims description 6
- 238000012544 monitoring process Methods 0.000 claims description 6
- 238000013461 design Methods 0.000 claims description 5
- GNFTZDOKVXKIBK-UHFFFAOYSA-N 3-(2-methoxyethoxy)benzohydrazide Chemical compound COCCOC1=CC=CC(C(=O)NN)=C1 GNFTZDOKVXKIBK-UHFFFAOYSA-N 0.000 claims description 3
- 239000003673 groundwater Substances 0.000 claims description 3
- 239000003245 coal Substances 0.000 abstract description 7
- 239000011435 rock Substances 0.000 abstract description 7
- 230000000694 effects Effects 0.000 abstract description 6
- 239000002699 waste material Substances 0.000 abstract description 4
- 238000009792 diffusion process Methods 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 5
- 230000008859 change Effects 0.000 description 4
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- FGUUSXIOTUKUDN-IBGZPJMESA-N C1(=CC=CC=C1)N1C2=C(NC([C@H](C1)NC=1OC(=NN=1)C1=CC=CC=C1)=O)C=CC=C2 Chemical compound C1(=CC=CC=C1)N1C2=C(NC([C@H](C1)NC=1OC(=NN=1)C1=CC=CC=C1)=O)C=CC=C2 FGUUSXIOTUKUDN-IBGZPJMESA-N 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F15/00—Methods or devices for placing filling-up materials in underground workings
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C41/00—Methods of underground or surface mining; Layouts therefor
- E21C41/16—Methods of underground mining; Layouts therefor
- E21C41/18—Methods of underground mining; Layouts therefor for brown or hard coal
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F15/00—Methods or devices for placing filling-up materials in underground workings
- E21F15/02—Supporting means, e.g. shuttering, for filling-up materials
- E21F15/04—Stowing mats; Goaf wire netting; Partition walls
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Remote Sensing (AREA)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
The invention relates to a non-closed overlying strata grouting, filling and isolating method, which is suitable for grouting and filling of coal mine overlying strata. Judging the development position of a main mining-induced fracture in overburden rock, constructing a large-aperture L-shaped isolation drilling hole, conveying an expandable flexible bag into a horizontal section of the isolation drilling hole, integrally positioning the flexible bag in the whole horizontal section, arranging an inlet at one end of the flexible bag close to a vertical section of the isolation drilling hole, performing recovery work of a grouting filling working face, and ensuring that the working face is pushed, grouting drilling hole grouting filling and water injection filling of the isolation bag are performed synchronously in the recovery process; and finally, high-concentration slurry is injected through the inlet to replace water in the isolation bag. According to the invention, the grouting filling space is isolated and sealed, so that the filling slurry is prevented from diffusing into the cavity of the mined-out side, the grouting filling in the mining overburden rock fracture is quickly pressurized, the waste of filling materials is reduced, and the grouting filling effect is ensured.
Description
Technical Field
The invention relates to an isolation and sealing method of a non-sealed overlying strata grouting filling cavity, which is particularly suitable for controlling the diffusion range of filling slurry under the condition that a mining-induced fracture cavity is not sealed under the condition that a filling working face is adjacent to a gob in coal mining overlying strata grouting filling mining.
Background
In recent years, the overlying strata isolation grouting filling technology plays an active role in 'third-lower' coal mining, provides a new thought for coal mining enterprises to solve coal compression mining, and ensures the safety of buildings (structures) above a coal mining working face.
In the application of the overburden rock isolation grouting filling technology, one side or multiple sides of a working surface to be filled are often mined out, the overburden rock mining fracture cavity under the working condition is not completely closed, if the overburden rock mining fracture cavity is implemented according to the conventional method, the diffusion range of filling slurry is large, the grouting effect is influenced, and meanwhile, huge waste of filling materials is caused. Therefore, aiming at the working condition that the filling working face overlying strata mining-induced fracture cavity is not closed, an isolation and sealing method of the non-closed overlying strata grouting filling cavity needs to be determined urgently.
At present, no technology and method for sealing the mining fracture cavity under the working conditions in the field are available. Aiming at the problem of a method for sealing a cavity of a overburden mining fracture, the conventional means generally controls the diffusion range of the slurry by modifying the slurry and regulating the fluidity of the slurry, so that the slurry is pressurized as soon as possible within a certain range of filling the mining fracture. In engineering practice, the method can accelerate the pressure rise speed of filling and mining fractures, but has high risk because the modification cost of the slurry material is high, and grouting is easily interrupted due to grouting and drilling blockage. Although the extent of diffusion of the slurry is reduced by the modification, the magnitude of the reduction is not ideal. Because the filling mining-induced fracture cavity is not closed, the filling amount is still huge, and the filling material is excessively wasted. Therefore, the slurry modification filling cost is high, the purpose of accurately controlling the slurry diffusion range cannot be realized, and the problem is very unfavorable for the development, popularization and application of the overlying strata grouting filling technology.
Disclosure of Invention
Aiming at the defects of the technology, the isolation and sealing method for the non-sealed overlying rock grouting filling cavity is low in cost, less in consumed time, strong in reliability, high in accuracy and simple in control method, and the purpose of preventing filling slurry from diffusing into a cavity on a mined-out side is achieved by isolating and sealing a grouting filling space, so that grouting filling is rapidly pressurized, waste of filling materials is reduced, and the grouting filling effect is guaranteed.
In order to achieve the technical purpose, the non-closed overlying strata grouting, filling and isolating method comprises the following steps of:
a. determining the lithology of the overlying strata according to the drilling columns of the stoping area, and judging the development position of a main mining-induced fracture in the overlying strata according to the lithology of the overlying strata, wherein the development position of the main mining-induced fracture is a grouting filling layer;
preferably, in the step a, vertical drilling holes can be constructed above the mined working face for detecting the development position of the main mining-induced fracture.
b. Constructing a large-aperture isolation drill hole at a position with a certain distance away from a cut hole on the adjacent goaf side of a grouting filling working face to serve as a conveying channel of an isolation bag, wherein the isolation drill hole is an L-shaped directional drill hole, the final hole of a vertical section is constructed to a grouting filling layer position, a horizontal section is positioned in the grouting filling layer position, the terminal point of the horizontal section is constructed to a certain distance away from a stoping line, and the extending direction of the horizontal section is parallel to the advancing direction of the working face;
preferably, in the step b, when the adjacent mining side has a mining residual mining-induced fracture, the mining residual mining-induced fracture is used as a part of the horizontal section of the isolation drilling hole.
c. The expandable flexible bag is directionally conveyed into the horizontal section of the isolation drilling hole by utilizing the flexible conveying rod through the isolation drilling hole, and the flexible bag is integrally positioned in the whole horizontal section;
preferably, in step c, the flexible pouch has a high-strength long cylindrical shape.
d. An inlet is arranged at one end of the flexible bag close to the vertical section of the isolation drill hole, and the inlet is connected with a water injection pipeline of a ground water injection system at an orifice through a connecting pipeline arranged in the vertical section of the isolation drill hole; a check valve and a pressure monitoring module are arranged at the orifice; the grouting drill hole is connected with a grouting pipeline of the ground grouting system at an orifice;
preferably, in the step d, a vertical receiving drill hole is constructed at a position, close to the adjacent empty side of the mined working face and a certain distance away from the mining stopping line, of the grouting filling working face, the final hole of the receiving drill hole is communicated with the end point of the horizontal section of the isolation drill hole, an outlet is arranged at one end, close to the receiving drill hole, of the flexible bag and connected with a connecting pipeline arranged in the receiving drill hole, and a valve is arranged at an orifice at the tail end of the connecting pipeline.
e. Before the grouting filling working face is recovered, firstly, the isolating bag is filled for the first time, in order to prevent the isolating bag from being blocked, the filled material selects water, and the primary filling work is stopped when the pressure values monitored by the check valve and the pressure monitoring module are continuously increased to the design pressure;
preferably, in the step e, the design pressure is to enable the isolation bag to be tightly attached to the hole wall of the horizontal section of the isolation drill hole, when the horizontal section comprises the mining-side residual mining-induced fracture, the isolation bag is to be tightly attached to the upper boundary and the lower boundary of the mining-side residual mining-induced fracture, and the purpose of isolating and sealing the mining-induced fracture space is achieved before the grouting filling working face is recovered.
f. And (4) carrying out recovery work on the grouting filling working face, and ensuring that the working face propulsion, the grouting, drilling, grouting and filling and the water injection and filling of the isolating bag are carried out synchronously in the recovery process.
Preferably, in step f, the grouting drilling grouting filling and the isolating bladder water filling are finished simultaneously.
Preferably, the method further comprises the step g of connecting an inlet with a grouting pipeline of a ground grouting system at an orifice through a connecting pipeline arranged in the vertical section of the isolation drill hole after the water injection filling of the isolation bag is finished; and opening the valve, injecting high-concentration slurry through the inlet to replace water in the isolating bag, and discharging the water from the valve, wherein the speed of the injected high-concentration slurry is not less than the water discharging speed.
Has the advantages that: according to the invention, the grouting filling space is isolated and sealed, so that the filling slurry is prevented from diffusing into the cavity of the mined-out side, the grouting filling in the mining overburden rock fracture is quickly pressurized, the waste of filling materials is reduced, and the grouting filling effect is ensured. The method does not influence the normal implementation of grouting filling, ensures the control effect of uninterrupted execution and surface subsidence, and solves the problems of slow pressure rise speed of the filling mining-induced fracture, large filling amount, increased invalid grouting proportion and the like caused by the unclosed cavity of the conventional grouting filling mining-induced fracture. The filling slurry is not required to be modified, and only the construction isolation drilling holes are required to be arranged with the isolation bags, so that the filling cost is greatly reduced. In addition, water is injected into the isolation bag before grouting filling is finished, the problem of blockage does not need to be considered, and the later strength and the surface subsidence control effect are ensured by replacing water through grouting after grouting filling is finished.
Drawings
FIG. 1 is a schematic illustration of the isolation closure method of the present invention inclined along the work surface;
FIG. 2 is a schematic plan view of the isolation closure method of the present invention;
FIG. 3 is a schematic plan view of the isolation closure method of the present invention in a two-sided goaf condition;
in the figure: 1-overburden mining fracture space; 2-mining the residual mining-induced fracture on the mining-induced side; 3-grouting and drilling; 4, isolating and drilling; 5-isolating the capsular bag; 6-a flexible transfer rod; 7-grouting and filling a working surface; 8-a mined working face; 9-a valve; 10-receiving the borehole.
Detailed Description
The invention is further described with reference to the accompanying drawings in which:
as shown in fig. 1-2, the non-closed overlying strata grouting, filling and isolating method of the invention comprises the following steps:
a. determining the lithology of the overlying strata according to the drilling columns of the extraction area, and accordingly judging the development position of a main mining-induced fracture in the overlying strata, wherein the development position of the main mining-induced fracture is a grouting filling layer, such as an overlying strata mining-induced fracture space 1 and a mining-goaf side residual mining-induced fracture 2 in the figure 1;
preferably, in step a, vertical drilling holes can be constructed above the mined working surface 8 for detecting the development position of the main mining-induced fracture.
b. Constructing a large-aperture isolation drill hole 4 at a position, close to an adjacent mining side of a mined working surface 8 and a certain distance away from a cutting hole, of a grouting filling working surface 7 to serve as a conveying channel of an isolation bag 5, wherein the isolation drill hole 4 is an L-shaped directional drill hole, a final hole of a vertical section is constructed to a grouting filling layer, a horizontal section is positioned in the grouting filling layer, the end point of the horizontal section is constructed to a certain distance away from a mining stopping line, and the extending direction of the horizontal section is parallel to the advancing direction of the working surface;
preferably, in the step b, when the adjacent mining side has the mining residual mining-induced fracture 2, the mining residual mining-induced fracture 2 is used as a part of the horizontal section of the isolation drilling hole.
c. The inflatable flexible bladder 5 is directionally conveyed into the horizontal section of the isolation drill hole through the isolation drill hole 4 by using a flexible conveying rod 6, and the flexible bladder 5 is integrally positioned in the whole horizontal section;
preferably, in step c, the flexible pouch has a high-strength long cylindrical shape.
d. An inlet is arranged at one end of the flexible bag 5 close to the vertical section of the isolation drill hole, and the inlet is connected with a water injection pipeline of a ground water injection system at an orifice through a connecting pipeline arranged in the vertical section of the isolation drill hole; installing a check valve and a pressure monitoring module (not shown in the figure) at the orifice; the grouting drill hole 3 is connected with a grouting pipeline of a ground grouting system at an orifice;
preferably, in the step d, a vertical receiving borehole 10 is constructed at a position, close to the adjacent side of the mined working face 8 and at a certain distance away from the mining stop line, of the grouting filling working face 7, the terminal hole of the receiving borehole 10 is communicated with the terminal point of the horizontal section of the isolation borehole 4, an outlet is arranged at one end, close to the receiving borehole 10, of the flexible bag 5, the outlet is connected with a connecting pipeline arranged in the receiving borehole, and a valve is arranged at the orifice at the tail end of the connecting pipeline.
e. Before the stoping of the grouting filling working face 7, firstly, the isolating bag is filled for the first time, in order to prevent the isolating bag from being blocked, the filled material selects water, and the initial filling work is stopped after the pressure value monitored by the check valve and the pressure monitoring module is continuously increased to the design pressure;
preferably, in the step e, the design pressure is to make the isolation bag 5 tightly fit with the hole wall of the horizontal section of the isolation drill hole, when the horizontal section contains the mining-side residual mining-induced fracture, the upper and lower boundaries of the isolation bag 5 and the mining-side residual mining-induced fracture tightly fit, that is, the purpose of isolating and sealing the mining-induced fracture space is achieved before the grouting filling working face 7 recovers.
f. And (4) carrying out the recovery work of the grouting filling working face 7, and ensuring that the working face propulsion, the grouting drilling and grouting filling and the isolated bag water injection filling are carried out synchronously in the recovery process.
Preferably, in step f, the grouting drilling grouting filling and the isolating bladder water filling are finished simultaneously.
Preferably, the method further comprises the step g of connecting an inlet with a grouting pipeline of the ground grouting system at an orifice through a connecting pipeline arranged in the vertical section of the isolation drill hole after the water injection and filling of the isolation bag is finished; and opening the valve, injecting high-concentration slurry through the inlet to replace water in the isolating bag, and discharging the water from the valve, wherein the speed of the injected high-concentration slurry is not less than the water discharging speed.
The isolation bag needs to be continuously injected with water in the stoping process, so that the problem that the isolation bag slides in a mining crack to cause the adjacent-empty boundary channel to open a filling working surface and quickly release pressure is solved; the adjacent cavity boundary in the mining-induced fracture can be always sealed, the residual mining-induced fracture diffusion of the filling slurry to the mining cavity side is prevented, and the pressure value is always maintained in the range of reaching the balanced formation pressure.
As the grouting filling working condition and the mining condition change, the size and the opening degree of the mining fracture continuously change, when the coal face propulsion and the grouting filling are synchronously carried out, the dynamic pressure change in the isolation bag is always required to be concerned, so that the plugging and pressure bearing conditions of the adjacent empty boundary of the grouting layer can be timely obtained, and the grouting filling parameters can be timely adjusted according to the change conditions.
As shown in fig. 3, when the grouting filling working surface 7 is mined from two sides, the isolation sealing system is constructed on the adjacent sides of the two sides according to the same steps.
Claims (8)
1. The non-closed overlying strata grouting, filling and isolating method is characterized by comprising the following steps of:
a. determining the lithology of the overlying strata according to the drilling columns of the stoping area, and judging the development position of a main mining-induced fracture in the overlying strata according to the lithology of the overlying strata, wherein the development position of the main mining-induced fracture is a grouting filling layer;
b. constructing a large-aperture isolation drill hole at a position, which is a certain distance away from a cutting hole, of an adjacent mining side of a grouting filling working surface to serve as a conveying channel of an isolation bag, wherein the isolation drill hole is an L-shaped directional drill hole, a final hole of a vertical section is constructed to a grouting filling layer position, a horizontal section is positioned in the grouting filling layer position, a terminal point of the horizontal section is constructed to a certain distance away from a mining stopping line, and the extending direction of the horizontal section is parallel to the advancing direction of the working surface;
c. the expandable isolation bag is directionally conveyed into the horizontal section of the isolation drilling hole through the isolation drilling hole by utilizing the flexible conveying rod, and the isolation bag is integrally positioned in the whole horizontal section;
d. an inlet is arranged at one end of the isolation bag close to the vertical section of the isolation drill hole, and the inlet is connected with a water injection pipeline of a ground water injection system at an orifice through a connecting pipeline arranged in the vertical section of the isolation drill hole; a check valve and a pressure monitoring module are arranged at the orifice; the grouting drill hole is connected with a grouting pipeline of the ground grouting system at an orifice;
e. before the stoping of the grouting filling working face, firstly, carrying out primary filling on the isolating bag, selecting water as a filling material for preventing the isolating bag from being blocked, and stopping the primary filling work after the pressure value monitored by the check valve and the pressure monitoring module is continuously increased to the design pressure;
f. and carrying out the recovery work of the grouting filling working face, and ensuring that the working face propulsion, the grouting drilling and grouting filling and the isolated bag water injection filling are carried out synchronously in the recovery process.
2. The non-enclosed overlying strata grouting, filling and isolating method of claim 1, wherein: in the step a, the development position of the main mining-induced fracture is detected by constructing a vertical drilling hole above the mined working face.
3. The non-enclosed overlying strata grouting, filling and isolating method of claim 1, wherein: in the step b, when the adjacent mining side has a mining residual main mining-induced fracture, the mining residual main mining-induced fracture is used as a part of the horizontal section of the isolation drilling hole.
4. The non-enclosed overlying strata grouting, filling and isolating method of claim 1, wherein: in the step c, the isolation bag is in a high-strength long cylindrical shape.
5. The non-enclosed overlying strata grouting, filling and isolating method of claim 3, wherein: and d, constructing a vertical receiving drill hole at a position, close to the adjacent empty side of the mined working surface and a certain distance away from the mining stopping line, of the grouting filling working surface, communicating a final hole of the receiving drill hole with a horizontal segment end point of an isolation drill hole, arranging an outlet at one end, close to the receiving drill hole, of the isolation bag, connecting the outlet with a connecting pipeline arranged in the receiving drill hole, and arranging a valve at an orifice at the tail end of the connecting pipeline.
6. The non-enclosed overlying strata grouting, filling and isolating method of claim 5, wherein: and e, designing pressure to enable the isolation bag to be tightly attached to the hole wall of the horizontal section of the isolation drill hole, enabling the upper boundary and the lower boundary of the isolation bag to be tightly attached to the upper boundary and the lower boundary of the mining side residual main mining crack when the horizontal section comprises the mining side residual main mining crack, and achieving the purpose of isolating and sealing the space of the main mining crack before grouting filling the stope.
7. The non-enclosed overlying strata grouting, filling and isolating method of claim 6, wherein: and f, finishing grouting, drilling and filling the grouting holes and filling the isolating bag with water at the same time.
8. The non-enclosed overburden grouting, filling and isolating method as recited in claim 1 or 7, wherein: step g, after the water injection and filling of the isolation bag are finished, connecting an inlet with a grouting pipeline of a ground grouting system at an orifice through a connecting pipeline arranged in a vertical section of the isolation drill hole; and opening the valve, injecting high-concentration slurry through the inlet to replace water in the isolating bag, and discharging the water from the valve, wherein the speed of the injected high-concentration slurry is not less than the water discharging speed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210340440.6A CN114562329B (en) | 2022-04-02 | 2022-04-02 | Non-closed overlying strata grouting, filling and isolating method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210340440.6A CN114562329B (en) | 2022-04-02 | 2022-04-02 | Non-closed overlying strata grouting, filling and isolating method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114562329A CN114562329A (en) | 2022-05-31 |
| CN114562329B true CN114562329B (en) | 2023-03-24 |
Family
ID=81719302
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210340440.6A Active CN114562329B (en) | 2022-04-02 | 2022-04-02 | Non-closed overlying strata grouting, filling and isolating method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114562329B (en) |
Family Cites Families (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4044563A (en) * | 1973-01-26 | 1977-08-30 | The Dow Chemical Company | Subsidence control |
| JP2010242468A (en) * | 2009-04-02 | 2010-10-28 | Teruo Takei | Bag filling method for filling cavity |
| RU2417321C1 (en) * | 2009-08-24 | 2011-04-27 | Общество с ограниченной ответственностью "ЭКОС-С" | Method to fill gaps in mining course |
| CN101701526B (en) * | 2009-11-05 | 2011-07-06 | 冀中能源邯郸矿业集团有限公司 | Goaf bag-type packing method |
| CN102155262B (en) * | 2011-03-11 | 2012-11-14 | 中国矿业大学 | Method for filling gas near roadway of coal mine gob-side entry retaining |
| CN106593445A (en) * | 2016-12-02 | 2017-04-26 | 淮北矿业（集团）有限责任公司 | Old goaf underlying close distance coal seam strata-overlying isolation grouting filling exploitation method |
| CN111365003B (en) * | 2020-03-11 | 2021-06-29 | 西安科技大学 | Combined subsidence reducing method for grouting of separation layer inner bag and plugging of water flowing fractured zone |
| CN111305896B (en) * | 2020-03-11 | 2022-02-22 | 西安科技大学 | Method for reducing damage by utilizing filling point source type interval support of hydraulic support rear bag |
| CN111173513B (en) * | 2020-03-16 | 2020-11-27 | 中国矿业大学 | Low-temperature fracturing roof caving method for hard roof of coal mine goaf |
| CN111485947A (en) * | 2020-03-31 | 2020-08-04 | 扬州中矿建筑新材料科技有限公司 | Method for quickly closing goaf by roof cutting, pressure relief and gob-side entry retaining |
| CN111608726A (en) * | 2020-07-06 | 2020-09-01 | 西安科技大学 | Method for reducing damage of spaced overlying rock crushed-expansion filling steel reinforcement cage bag by grouting |
| CN112696182A (en) * | 2021-01-12 | 2021-04-23 | 山西银锋科技有限公司 | Drilling hole plugging, fracturing and water injection integrated structure and using method thereof |
| CN214384159U (en) * | 2021-01-21 | 2021-10-12 | 山东高速岚临高速公路有限公司 | Controllable umbrella-shaped mold bag grouting device for steeply inclined goaf |
-
2022
- 2022-04-02 CN CN202210340440.6A patent/CN114562329B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN114562329A (en) | 2022-05-31 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110656937B (en) | Fluidized coal gas simultaneous mining system and method | |
| CN108518222B (en) | Paste body filling combination top plate presplitting second mining super high seam stops the method for adopting line coal column | |
| CN103291325B (en) | The preventing control method of Coal-mining Above Confined-water floor strata gushing water | |
| US20240102343A1 (en) | Isolated overburden grouting filling method for coal gangue underground emission reduction | |
| CN102628345B (en) | Sealing method of high sealing quasi-horizontal drilling hole | |
| CN104481540A (en) | Method for controlling multiple coal mining hazards by high level borehole grouting | |
| CN108643877A (en) | Coal mine underground coal seam long drilling staged fracturing permeability-increasing and gas extraction method | |
| CN109209472A (en) | The coal seam pressure relief anti-burst method that a kind of punching, explosion, water filling intercouple | |
| CN112228142B (en) | Slow-dip coal seam roadway design and adjacent layer and goaf gas extraction method | |
| CN113653492B (en) | Method for preventing rock burst in filling mining | |
| CN105351001A (en) | Gas extraction method for region reinforcement of gob-side entry retaining | |
| CN110439497A (en) | Drill multistage closure, fracturing, slip casting, water filling integration apparatus and application method | |
| CN111577378B (en) | Gas extraction and filling collaborative mining method for coal and gas outburst coal seam | |
| CN112253115A (en) | Near-horizontal coal seam roadway type cemented filling mining method | |
| CN109578058B (en) | Method for improving gas extraction concentration of extraction borehole through auxiliary drilling | |
| RU2065973C1 (en) | Method for degassing accompanying seams | |
| CN207761705U (en) | Gas drainage system based on roof horizontal drilling | |
| CN107143374B (en) | The gas production method and system of belt pressing type drilling positive pressure mining | |
| CN114562329B (en) | Non-closed overlying strata grouting, filling and isolating method | |
| CN117108283B (en) | Fluidized coal mining method utilizing self energy storage of coal seam | |
| CN116464412A (en) | Device and method for sealing gas extraction drilling holes at fixed points for multiple times | |
| CN103758569B (en) | A kind of breaking roof Collapsed zone grouting filling system | |
| CN113756857B (en) | Fire prevention and extinguishment extraction method for efficiently extracting coal bed gas in multi-layer old goaf on ground | |
| CN111894672B (en) | Method for advanced treatment of roof separation water damage of stope by adopting ground drainage drilling | |
| CN114562330B (en) | Method for controlling diffusion range of filling slurry for overburden rock isolation grouting |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |