CN114165233A - Strong dynamic pressure coal seam roadway arrangement method along middle reserved wall - Google Patents
Strong dynamic pressure coal seam roadway arrangement method along middle reserved wall Download PDFInfo
- Publication number
- CN114165233A CN114165233A CN202111444061.3A CN202111444061A CN114165233A CN 114165233 A CN114165233 A CN 114165233A CN 202111444061 A CN202111444061 A CN 202111444061A CN 114165233 A CN114165233 A CN 114165233A
- Authority
- CN
- China
- Prior art keywords
- roadway
- wall body
- stoping
- reserved
- along
- 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.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims abstract description 42
- 239000003245 coal Substances 0.000 title claims abstract description 35
- 238000005065 mining Methods 0.000 claims abstract description 39
- 238000009423 ventilation Methods 0.000 claims abstract description 24
- 230000008569 process Effects 0.000 claims abstract description 17
- 238000000605 extraction Methods 0.000 claims abstract description 9
- 230000000717 retained effect Effects 0.000 claims abstract description 7
- 239000002184 metal Substances 0.000 claims description 11
- 238000005553 drilling Methods 0.000 claims description 4
- 238000007789 sealing Methods 0.000 claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 239000002002 slurry Substances 0.000 claims description 2
- 238000011084 recovery Methods 0.000 description 10
- 238000005516 engineering process Methods 0.000 description 5
- 238000012423 maintenance Methods 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- 230000000903 blocking effect Effects 0.000 description 3
- 238000010276 construction Methods 0.000 description 3
- 230000005641 tunneling Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000011435 rock Substances 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 239000010878 waste rock Substances 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH 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 DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F1/00—Ventilation of mines or tunnels; Distribution of ventilating currents
- E21F1/006—Ventilation at the working face of galleries or tunnels
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F13/00—Transport specially adapted to underground conditions
- E21F13/06—Transport of mined material at or adjacent to the working face
Abstract
The application provides a strong dynamic pressure coal seam roadway arrangement method along a middle reserved wall, which comprises the steps of arranging a transportation roadway and an auxiliary transportation roadway on two sides of an extraction area, and arranging a ventilation tail roadway communicated with the auxiliary transportation roadway between the extraction area and a mining area boundary; constructing a top-cut wall body in the auxiliary conveying roadway in advance for a certain distance from the initial cutting hole along the length direction so that the auxiliary conveying roadway is divided into a reserved roadway and another middle-edge retained roadway by the wall body; performing roof cutting and pressure relief at a certain angle at the corner position of the top plate side on one side of the auxiliary conveying roadway close to the stoping side; and (3) continuously laying a wall body and roof cutting pressure relief in the middle of the auxiliary conveying roadway while stoping in the stoping process of the stoping area, entering a goaf behind the working face along the middle retained roadway and forming a working face air return roadway with the ventilation tail roadway, and using the working face air return roadway as a conveying roadway when stoping of the adjacent working face. The roadway layout process combining the middle reserved wall body and advanced pressure relief is adopted, so that the roadway is high in one-step forming rate, small in roadway deformation and easy to maintain at the end.
Description
Technical Field
The application relates to the technical field, in particular to a strong dynamic pressure coal seam roadway arrangement method along a middle reserved wall body.
Background
The middle-edge entry retaining is a key technology for solving the problem of gas over-limit, is widely applied to a high-gas mine stoping area, and generally, a flexible-mold concrete wall, a single top-cutting upright column and other modes are adopted on one side of a coal face air return lane along the edge of a goaf to maintain the original stoping lane, so that a two-in-one Y-shaped ventilation mode is formed, the upper corner of the working face air return lane is cancelled, and the problem of gas over-limit is avoided. The reserved roadway can be reused after being maintained again for the next adjacent working face, the coal pillars in the sections are cancelled, and a large amount of coal resources can be saved. Because the reserved wall or the roof cutting column is positioned at the edge of the goaf, the functions of cutting down the top plate and sealing the goaf are required, the deformation of the roadway is ensured to be within a controllable range, and the requirements of equipment arrangement, ventilation and pedestrians on the next working face can be met.
Traditional intermediate-edge entry retaining generally adopts two ways: firstly, reserving a wall tunnel on one side of a goaf for direct reuse; and secondly, digging a tunnel along the wall after the tunnel is externally supported by the wall. Under the influence condition of a soft coal seam or strong mining, the stability of the coal seam is poor, the first mode is adopted, the roadway retaining deformation influenced by mining of the working face is large, the multiplexing requirement of the next working face can be met through multiple times of expanding and repairing, surrounding rocks influenced by secondary mining in the multiplexing process of the roadway are easy to deform and damage, and the maintenance workload is large. Meanwhile, the working face recovery speed is limited by the wall retaining speed, and the working face recovery efficiency is low. By adopting the second mode, the workload of maintaining the roadway is less, but by adopting the roadway arrangement method of digging the roadway along the wall, because the wall is thin, the digging time needs to be strictly controlled, and the condition that the roadway is seriously deformed due to the opposite digging of the mining is avoided, so that the unbalanced digging is easily caused. The roadway arrangement method provided by the invention can effectively control the deformation of the gob-side roadway, ensure the ventilation quantity of the working face and reduce the roadway tunneling engineering quantity. Meanwhile, the roadway is tunneled and the wall is reserved for simultaneous operation, the number of end operation personnel is reduced, the risk of wall reserving operation behind the end is reduced, and the working face extraction efficiency can be effectively improved.
Disclosure of Invention
The present application is directed to solving, at least to some extent, one of the technical problems in the related art.
Therefore, the strong dynamic pressure coal seam roadway arrangement method along the middle reserved wall body is provided, a roadway arrangement new process combining the middle reserved wall body and advanced pressure relief is adopted, and the method has the advantages of being high in roadway one-step forming rate, small in roadway deformation, easy in end maintenance, high in working face mining efficiency, capable of reducing roadway retaining equipment and material investment, reducing roadway tunneling engineering quantity and the like, suitable for high-gas mines with strong mining dynamic pressure and large roadway deformation, and capable of solving the problems of low coal mine gob-side roadway retaining efficiency, roadway changeability, large multiplexing difficulty and the like.
In order to achieve the purpose, the strong dynamic pressure coal seam roadway arrangement method along the middle reserved wall body comprises the following steps:
arranging a transportation roadway and an auxiliary transportation roadway on two sides of the stoping area, and arranging a ventilation tail roadway communicated with the auxiliary transportation roadway between the stoping area and the boundary of the mining area;
building a roof cutting wall body in an auxiliary conveying roadway from an initial cutting hole to the advance direction of an extraction area along the trend direction of the extraction area so that the auxiliary conveying roadway is divided into a reserved roadway close to the extraction area and another intermediate roadway communicated with the ventilation tail roadway by the wall body;
constructing and drilling at a certain angle at the corner position of the top plate side on one side of the auxiliary transportation lane close to the stoping side to perform roof cutting and pressure relief;
and in the stoping process of the stoping area, walls and roof cutting pressure relief are continuously arranged in the middle of the auxiliary conveying roadway while stoping, when the walls enter the goaf along the middle retained roadway and form a working face air return roadway with the ventilation tail roadway, and when stoping is performed in an adjacent stoping area of the auxiliary conveying roadway, the working face air return roadway is used as a conveying roadway of the adjacent stoping area.
And further, a mining area boundary return airway which is vertically communicated with the ventilation tail airway is arranged on the mining area boundary, so that the air entering the auxiliary transportation airway and the air which enters the transportation airway and then enters the working face are both led into the ventilation tail airway and the mining area boundary return airway for returning air.
Furthermore, air return channels are reserved on the wall body at certain intervals.
Further, the distance between two adjacent return air channels is 10m, and the width of each return air channel is 1.5 m.
Furthermore, a top-cutting concrete wall body is built in the auxiliary conveying roadway from the initial cutting hole to the advance direction of the stoping area by 100m along the trend direction of the stoping area, and the wall body continuously arranged in the middle of the auxiliary conveying roadway while stoping is advanced by 100m of the working surface in the stoping process of the stoping area.
Furthermore, the distance between the wall body and one side of the stoping wall is 1.5-2m, and the width of the wall body is 1 m.
Furthermore, after the top-cutting wall body is built from the initial cutting hole to the advance direction of the stoping area along the trend direction of the stoping area in the auxiliary conveying roadway, a metal net is hung on one side, located on the reserved roadway, of the wall body, and slurry is sprayed on the metal net.
Further, the specific process of roof cutting and pressure relief is as follows:
and constructing a top plate fracturing drill hole at a certain angle at the position of the top plate side angle of the auxiliary transportation lane close to one side of the stoping side, injecting high-pressure water into the fracturing drill hole until the fracturing drill hole reaches a predetermined fracturing layer, and starting expansion of the hydraulic expansion type high-pressure hole packer to perform hole sealing and directional staged fracturing.
Further, the fracturing drill holes are arranged at equal intervals along the stoping wall.
And further, after one air return channel on the wall body enters the goaf, hanging a metal net covering the air return channel on the wall body, and plugging the previous air return channel entering the goaf when the next adjacent air return channel just enters the goaf.
Additional aspects and advantages of the present application will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the present application.
Drawings
The foregoing and/or additional aspects and advantages of the present application will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a flowchart of a method for arranging a strong dynamic pressure coal seam roadway along a reserved wall in the coal seam roadway;
fig. 2 is a schematic structural diagram of a roadway layout of a coal seam before stoping according to an embodiment of the present application;
fig. 3 is a schematic structural diagram of a coal seam roadway layout in a mining process according to another embodiment of the present application;
FIG. 4 is a cross-sectional view of the structure taken along line A-A of FIG. 3 of the present application;
fig. 5 is a structural sectional view in the direction B-B in fig. 3 of the present application.
In the figure: 1. a transportation lane; 2. auxiliary conveying lanes; 3. a work surface device; 4. a ventilation tail lane; 5. a mining area boundary return airway; 6. a gob; 7. fracturing the drill hole; 8. a wall body; 9. an air return channel; 10. plugging the area; 11. reserving a roadway; 12. reserving a lane along the middle part; 13. a recovery area; 14. an upper corner; 15. working face return airway.
Detailed Description
Reference will now be made in detail to embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present application and are not to be construed as limiting the present application. On the contrary, the embodiments of the application include all changes, modifications and equivalents coming within the spirit and terms of the claims appended hereto.
Fig. 1 is a flowchart of a method for arranging a strong dynamic pressure coal seam roadway along a reserved wall in a tunnel body according to an embodiment of the present application.
The average thickness of a coal seam of a certain high-gas mine is 3.6m, the coal seam is a medium-hard coal seam, the inclination angle of the coal seam is 1-3 degrees, the roof is a II-type stable roof, a fully-mechanized mining one-time mining full-height process is adopted for mining, the height of an auxiliary transportation roadway is 3.2m, the width of the auxiliary transportation roadway is 7.5m, a roadway arrangement mode of a reserved wall body in the middle of a wide-section roadway and an advanced pressure relief technology is adopted, and the concrete arrangement mode is as follows with reference to fig. 2-5:
step 1: the transport lane 1 and the auxiliary transport lane 2 are arranged on two sides of the stoping area 13, and the ventilation tail lane 4 communicated with the auxiliary transport lane 2 is arranged between the stoping area 13 and the mining area boundary, so that air is fed through the transport lane 1 and the auxiliary transport lane 2, and because a working face (namely, a lane for installing working face equipment 3) is arranged at one end of the stoping area 13 and is used for installing the working face equipment 3 (a hydraulic support, a coal mining machine, a scraper conveyor and the like), the air entering the transport lane 1 enters the ventilation tail lane 4 through the working face.
Step 2: after the working face equipment 3 of the recovery area 13 is installed, the wall 8 with the cut top is built in the auxiliary conveying roadway 2 from the initial cut hole to the recovery area 13 along the length direction in advance for a certain distance, so that the auxiliary conveying roadway 2 is divided into a reserved roadway 11 close to the recovery area 8 and another middle retained roadway 12 communicated with the ventilation tail roadway 4 by the wall 8, the middle retained roadway 12 can be formed at one time, the deformation of the roadway is small, the tunneling engineering quantity of the roadway is reduced, the preparation of the working face is accelerated, and the problems that the mining influence of a high gas mine is severe or the deformation of the roadway is large and the repair needs to be repeated due to the fact that a coal seam is soft are solved.
In detail, before the working face equipment 3 starts to recover, a top-cutting wall body 8 is built in front of the working direction of the working face equipment 3, the wall body 8 is supported at the top of the auxiliary conveying lane 2, the top of the auxiliary conveying lane 2 can be supported through the wall body 8, wherein the top-cutting wall body 8 can be built in the auxiliary conveying lane 2 from an initial cutting hole to the advancing direction of the recovery area 13 along the running direction of the recovery area 13 by 100m, the width of the wall body 8 can be determined according to the height of the auxiliary conveying lane 2, the width-to-height ratio is not less than 1:4, the width of the wall body 8 can be 1m, the distance from one side of the recovery side to the wall body 8 can be 2m (namely the width of the reserved lane 11 can be 2m), the width along the middle reserved lane 12 can be 4.5m, the wall body 8 is of a concrete wall body structure, a brick-concrete structure can be adopted, the investment cost of materials such as the traditional flexible mold bag, the counter-pull anchor rod and the like is saved, and the construction at the rear of the working face is not required, the investment of equipment such as a waste rock blocking bracket, a filling transition bracket and the like is saved.
And step 3: the construction drilling is carried out at the corner position of the top plate wall on one side of the reserved roadway 11 close to the stoping wall at a certain angle for roof cutting and pressure relief, a drilling machine and a high-pressure pump station are adopted to carry out hydraulic fracturing roof cutting and pressure relief work, a constructor is positioned in the reserved roadway 12, the influence of stoping pressure and lateral bearing pressure on the auxiliary conveying roadway 2 and the reserved concrete wall 8 is favorably reduced, the concrete wall 8 is reserved in the middle of the auxiliary conveying roadway 2, a gap with a certain distance can be kept between the wall 8 and the goaf 6, the goaf 6 caving gangue falls into the reserved roadway 11 for buffering, the extrusion of the goaf 6 caving gangue on the wall 8 is effectively reduced, the consumption of gangue blocking wood point columns is saved, and the self stability of the concrete wall 8 can be improved while the cost of the intermediate retained roadway 12 is reduced.
And 4, step 4: the stoping is carried out in the stoping area 13, the wall 8 is continuously arranged in the middle of the auxiliary conveying roadway 2 while stoping and roof cutting pressure relief is carried out during the stoping process, 100m ahead working face of the arranged wall is guaranteed, because the wall 8 is already arranged in the stoping area 13 100m ahead before stoping, when the wall 8 is continuously arranged while stoping in the stoping process, stoping and wall retaining parallel operation can be realized, the construction of the concrete wall 8 is not limited by the traditional single-shift operation time (the traditional middle-shift retaining roadway can only be used for maintenance work), the stoping speed is not limited by the wall retaining speed, the stoping 6 and the ventilation tail roadway 4 which enter the rear part of the working face along the middle-shift roadway 12 form a working face air-returning roadway 15, and when the adjacent working face is stoped, the working face air-returning roadway 15 is used as a conveying roadway.
In some embodiments, the method further comprises arranging a mining area boundary return air lane 5 which is vertically communicated with the ventilation tail lane 4 at the mining area boundary, so that the air entering the auxiliary transportation lane 2 and the air which enters the working face after entering the transportation lane 1 both enter the ventilation tail lane 4 and the mining area boundary return air lane 5 for return air, a two-in-one Y-shaped ventilation system is formed, and the mining area boundary return air lane 5 penetrates through the mining area boundaries corresponding to a plurality of mining areas 13 which are arranged side by side, so that the boundary return air lane 5 can serve a plurality of mining areas 13.
In some embodiments, in order to ensure that the wall 8 is arranged without affecting ventilation, return air channels 9 can be reserved on the wall 8 at regular intervals, so that the wind entering the reserve lane 12 in the auxiliary conveyor lane 2 and the wind entering the face equipment 3 from the conveyor lane 1 can enter the face return lane 15 through the return air channel 9 for return air, thereby providing a return air path, and the return air channel 9 can be used for pedestrians to pass through and transporting materials, and simultaneously, as the roof of the recovery area 13 enters the goaf 6 to stride, the top plate at the top of the reserved roadway 11 will not collapse immediately after entering the gob 6, and may collapse after two days, at this time, part of the wind introduced into the working face enters the upper corner 14, the wind entering the upper corner 14 can return through the return air duct 9 in the wall 8 into the working face return air passage 15.
In addition, it should be noted that the distance between two adjacent return air passages 9 may be 10m, and the width of the return air passage 9 may be 1.5 m.
In some embodiments, after one air return channel 9 on the wall 8 enters the gob 6, a metal mesh covering the air return channel 9 is hung on the wall 8, and when the next adjacent air return channel 9 just enters the gob 6, the last air return channel 9 entering the gob is blocked, and due to the arrangement of the blocking area 10 in the air return channel 9, air leakage of the gob 6 can be prevented.
Specifically, because the distance between two adjacent air return channels 9 is 10m, for example, after the 1# air return channel 9 enters the gob 6, a metal mesh covering the 1# air return channel is hung on the wall 8 to prevent the goaf from caving gangue from entering the working face air return lane 15, and after the 1# air return channel enters the gob 10m, when the 2# air return channel 9 just enters the goaf 6, the 1# air return channel 9 is plugged in time to prevent the goaf 6 from leaking air.
In some embodiments, after the roof cutting wall 8 is built in the auxiliary conveying roadway 2 from the initial cutting hole to the advance direction of the stoping area 13 along the direction of the stoping area 13, a metal mesh is hung on one side of the wall 8, which is located on the reserved roadway 11, and guniting is performed on the metal mesh, wherein the guniting thickness is not less than 50mm, the phenomenon that the top plate collapses after entering the goaf 6 is blocked due to the arrangement of the metal mesh can be realized, and the influence on the wall 8 caused by the fact that the gangue directly acts on the wall 8 is prevented.
In some embodiments, the specific process of roof cutting pressure relief is: constructing a top plate fracturing drill hole 7 at a certain angle at the position, close to the stoping wall, of the top plate wall on one side of the reserved roadway 12, enabling the depth of the fracturing drill hole 7 to reach a predetermined fracturing layer, injecting high-pressure water into the fracturing drill hole 7 through equipment such as a high-pressure pump and a high-pressure rubber pipe, starting expansion of the hydraulic expansion type high-pressure hole packer, and performing hole sealing and directional staged fracturing.
In addition, it should be noted that a plurality of fracturing drill holes 7 are equidistantly arranged along the stoping wall, the row spacing of the drill holes is determined according to the lithology and the crack development degree of the top plate, the fracturing drill holes 7 can be drilled in advance, 1 set of fracturing drill holes 7 are constructed every 6m along the stoping wall of the auxiliary transportation roadway 2, the hole depth can be adjusted according to the structure of the top plate, and the height of the top plate in the upward vertical direction (namely the thickness of the top plate) is not less than 14 m.
In summary, this application is based on keeping a roadway Y type in following and ventilates, adopts the tunnel arrangement mode of wall body + advanced release technique in the middle part of the tunnel. The method adopts a mode of reserving a wall at the middle part of a wide-section roadway to replace the traditional roadside wall reserving mode, is matched with a roof cutting pressure relief technology, solves the problem that the mining pressure damages a reserved wall body and surrounding rocks of the roadway, ensures that the roadway at the outer side of the wall body serves the next working face, simultaneously reserves an air return channel at intervals of a distance on the wall body, meets the air return requirement during the mining of the working face, can effectively control the deformation of the gob-side entry 12, is matched with an advanced pressure relief technology, solves the problems of severe mine pressure and large maintenance workload due to the influence of twice mining on the rear part of the working face of the conventional coal mine gob-side entry, reduces the labor intensity of workers, can effectively control the deformation of the gob-side entry, is matched with the advanced pressure relief technology, solves the problems of severe mine pressure and large maintenance workload due to the influence of twice mining on the conventional coal mine gob-side entry at the rear part of the working face, reduces the labor intensity of workers
It should be noted that, in the description of the present application, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. In addition, in the description of the present application, "a plurality" means two or more unless otherwise specified.
Any process or method descriptions in flow charts or otherwise described herein may be understood as representing modules, segments, or portions of code which include one or more executable instructions for implementing specific logical functions or steps of the process, and the scope of the preferred embodiments of the present application includes other implementations in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order, depending on the functionality involved, as would be understood by those reasonably skilled in the art of the present application.
In the description herein, reference to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., means 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 application. 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.
Although embodiments of the present application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present application, and that variations, modifications, substitutions and alterations may be made to the above embodiments by those of ordinary skill in the art within the scope of the present application.
Claims (10)
1. A strong dynamic pressure coal seam roadway arrangement method along a reserved wall body is characterized by comprising the following steps:
arranging a transportation roadway and an auxiliary transportation roadway on two sides of the stoping area, and arranging a ventilation tail roadway communicated with the auxiliary transportation roadway between the stoping area and the boundary of the mining area;
building a roof cutting wall body in an auxiliary conveying roadway from an initial cutting hole to the advance direction of an extraction area along the trend direction of the extraction area so that the auxiliary conveying roadway is divided into a reserved roadway close to the extraction area and another intermediate roadway communicated with the ventilation tail roadway by the wall body;
constructing and drilling at a certain angle at the corner position of the top plate side on one side of the auxiliary transportation lane close to the stoping side to perform roof cutting and pressure relief;
and in the stoping process of the stoping area, walls and roof cutting pressure relief are continuously arranged in the middle of the auxiliary conveying roadway while stoping, when the walls enter the goaf along the middle retained roadway and form a working face air return roadway with the ventilation tail roadway, and when stoping is performed in an adjacent stoping area of the auxiliary conveying roadway, the working face air return roadway is used as a conveying roadway of the adjacent stoping area.
2. The method for arranging a strong dynamic pressure coal seam roadway along a medium reserved wall body according to claim 1, further comprising arranging a mining area boundary return air roadway which is vertically communicated with a ventilation tail roadway at the mining area boundary, so that air entering the auxiliary transportation roadway and air entering a working face after entering the transportation roadway are both led into the ventilation tail roadway and the mining area boundary return air roadway for returning air.
3. The method for arranging the strong dynamic pressure coal seam roadway along the reserved wall body in the claim 1, wherein air return channels are reserved on the wall body at certain intervals.
4. The method for arranging the strong dynamic pressure coal seam roadway along the reserved wall body in the claim 3, wherein the distance between two adjacent return air channels is 10m, and the width of each return air channel is 1.5 m.
5. The method for arranging a strong dynamic pressure coal seam roadway along a reserved wall body in claim 1, wherein a roof cutting concrete wall body is built in the auxiliary conveying roadway from an initial cutting hole to the advancing direction of the mining area by 100m along the running direction of the mining area, and the wall body continuously arranged in the middle of the auxiliary conveying roadway while mining is advanced by 100m in the mining process of the mining area.
6. The method for arranging the strong dynamic pressure coal seam roadway along the reserved wall body in the claim 1 or 5 is characterized in that the distance between the wall body and the stoping side is 1.5-2m, and the width of the wall body is 1 m.
7. The method for arranging a strong dynamic pressure coal seam roadway along a middle reserved wall body according to claim 1, wherein after the top-cut wall body is built in the auxiliary transportation roadway from the initial cutting hole to the advance direction of the stoping area along the running direction of the stoping area, a metal mesh is hung on one side of the wall body, which is positioned on the reserved roadway, and the metal mesh is sprayed with slurry.
8. The method for arranging the strong dynamic pressure coal seam roadway along the middle reserved wall body according to claim 1, wherein the concrete process of roof cutting and pressure relief is as follows:
and constructing a top plate fracturing drill hole at a certain angle at the position of the top plate side angle of the auxiliary transportation lane close to one side of the stoping side, injecting high-pressure water into the fracturing drill hole until the fracturing drill hole reaches a predetermined fracturing layer, and starting expansion of the hydraulic expansion type high-pressure hole packer to perform hole sealing and directional staged fracturing.
9. The method for arranging the strong dynamic pressure coal seam roadway along the reserved wall body as claimed in claim 8, wherein a plurality of the fracturing boreholes are equidistantly arranged along the stoping wall.
10. The method for arranging the strong dynamic pressure coal seam roadway along the middle reserved wall body according to claim 1, further comprising the step of hanging a metal net covering the air return channel on the wall body after the air return channel on the wall body enters the goaf, and plugging the previous air return channel entering the goaf when the next adjacent air return channel just enters the goaf.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111444061.3A CN114165233A (en) | 2021-11-30 | 2021-11-30 | Strong dynamic pressure coal seam roadway arrangement method along middle reserved wall |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111444061.3A CN114165233A (en) | 2021-11-30 | 2021-11-30 | Strong dynamic pressure coal seam roadway arrangement method along middle reserved wall |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114165233A true CN114165233A (en) | 2022-03-11 |
Family
ID=80481743
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111444061.3A Pending CN114165233A (en) | 2021-11-30 | 2021-11-30 | Strong dynamic pressure coal seam roadway arrangement method along middle reserved wall |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114165233A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103758559A (en) * | 2014-01-09 | 2014-04-30 | 中国矿业大学 | Gob-side entry retaining Y-type ventilation high-position return airway drilling gas extracting method |
| WO2016206616A1 (en) * | 2015-06-24 | 2016-12-29 | 何满潮 | Equipment system for no-roadway no-coal-pillar retained roadway mining method |
| CN109209382A (en) * | 2018-10-23 | 2019-01-15 | 西山煤电(集团)有限责任公司 | No coal column is without pick lane Z-type working face extraction method |
| CN110714762A (en) * | 2019-11-20 | 2020-01-21 | 中国矿业大学(北京) | Reciprocating type secondary rapid stoping method for residual coal body in thick coal seam caving coal goaf |
| CN110886611A (en) * | 2019-12-06 | 2020-03-17 | 河南力行科创矿山技术开发有限公司 | Gob-side entry driving process for high-gas large-mining-height working face |
| CN110905507A (en) * | 2019-12-06 | 2020-03-24 | 河南力行科创矿山技术开发有限公司 | Advanced roof cutting pressure relief gob-side entry retaining process for high-gas large-mining-height high-efficiency mining working face |
-
2021
- 2021-11-30 CN CN202111444061.3A patent/CN114165233A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103758559A (en) * | 2014-01-09 | 2014-04-30 | 中国矿业大学 | Gob-side entry retaining Y-type ventilation high-position return airway drilling gas extracting method |
| WO2016206616A1 (en) * | 2015-06-24 | 2016-12-29 | 何满潮 | Equipment system for no-roadway no-coal-pillar retained roadway mining method |
| CN109209382A (en) * | 2018-10-23 | 2019-01-15 | 西山煤电(集团)有限责任公司 | No coal column is without pick lane Z-type working face extraction method |
| CN110714762A (en) * | 2019-11-20 | 2020-01-21 | 中国矿业大学(北京) | Reciprocating type secondary rapid stoping method for residual coal body in thick coal seam caving coal goaf |
| CN110886611A (en) * | 2019-12-06 | 2020-03-17 | 河南力行科创矿山技术开发有限公司 | Gob-side entry driving process for high-gas large-mining-height working face |
| CN110905507A (en) * | 2019-12-06 | 2020-03-24 | 河南力行科创矿山技术开发有限公司 | Advanced roof cutting pressure relief gob-side entry retaining process for high-gas large-mining-height high-efficiency mining working face |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108194081B (en) | Coal mining operation method | |
| US10494924B2 (en) | Longwall mine construction method N00 | |
| CN110886611B (en) | Gob-side entry driving process for high-gas large-mining-height working face | |
| CN109209382B (en) | Non-pillar non-entry-driving Z-shaped working face extraction method | |
| WO2016206616A1 (en) | Equipment system for no-roadway no-coal-pillar retained roadway mining method | |
| CN111878080B (en) | Method for equipment withdrawal and self-lane-forming of withdrawal channel of fully mechanized coal mining face of coal mine | |
| CN110905507A (en) | Advanced roof cutting pressure relief gob-side entry retaining process for high-gas large-mining-height high-efficiency mining working face | |
| CN110030013B (en) | Gob-side entry retaining method for three-seam periodic roof cutting self-entry side of transition support area | |
| CN109505606B (en) | Pre-roof-control mechanized sublevel open stoping subsequent filling mining method | |
| CN104234749A (en) | Surrounding rock control method for large-section dismantling tunnel of fully-mechanized mining face | |
| CN111663950A (en) | Advanced support and earth pressure unloading mining method | |
| CN113605893B (en) | Control method for pre-filling full gob-side entry driving surrounding rock | |
| CN111550248B (en) | Pre-roof-protecting sublevel open-stoping subsequent filling mining method | |
| CN111720119B (en) | Coal mine pillar-free wall-reserving mining method | |
| CN114165233A (en) | Strong dynamic pressure coal seam roadway arrangement method along middle reserved wall | |
| CN113944464B (en) | Coal mining method of corner coal full-negative-pressure continuous miner | |
| CN112647947B (en) | Non-coal-pillar mining method for mining area | |
| CN115163174A (en) | Continuous mining and continuous filling coal mining method based on double-lane operation mode | |
| CN109944634B (en) | Coal seam top and bottom plate filling type goaf filling structure and filling method thereof | |
| CN114575844A (en) | Roadway roof segmented pressure relief and reinforcement control method based on double-roadway excavation | |
| CN110185449B (en) | Medium-length hole mining method aiming at unstable rock stratum above gently inclined thin ore body | |
| CN113356850A (en) | Method and system for pre-digging and withdrawing channel of fully mechanized mining face with large mining height | |
| CN218266024U (en) | Stoping roadway based on gas control | |
| CN104405404A (en) | Mine gas tail roadway reservation method | |
| CN115492630A (en) | Stoping roadway arrangement method based on gas control |
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 |