CN115234238A - Method for scrapping ascending or large roadway in sections for continuous mining of underground coal resources - Google Patents
Method for scrapping ascending or large roadway in sections for continuous mining of underground coal resources Download PDFInfo
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- CN115234238A CN115234238A CN202210794855.0A CN202210794855A CN115234238A CN 115234238 A CN115234238 A CN 115234238A CN 202210794855 A CN202210794855 A CN 202210794855A CN 115234238 A CN115234238 A CN 115234238A
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C41/00—Methods of underground or surface mining; Layouts therefor
- E21C41/26—Methods of surface mining; Layouts therefor
- E21C41/28—Methods of surface mining; Layouts therefor for brown or hard coal
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- E—FIXED CONSTRUCTIONS
- E21—EARTH 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
- E21F15/005—Methods or devices for placing filling-up materials in underground workings characterised by the kind or composition of the backfilling material
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F17/00—Methods or devices for use in mines or tunnels, not covered elsewhere
Abstract
The invention relates to the field of coal mining, in particular to a method for scrapping mountain climbing or large roadway sections during continuous mining of underground coal resources. The limit of recovery of coal pillars between the working faces of the existing underground mining, and the protection coal pillars on two sides of the mountain and the large roadway are combined. The method for scrapping the upper mountain or the large roadway in the underground mining range in sections is provided, so that the roadway utilization value is maximally realized while the inside of a mining area is completely free of coal pillars. In the method, the return air and the transportation main roadway are used as extraction roadways, the working faces are lapped by adopting two methods of staggered layer internal staggered type or roof cutting pressure relief automatic roadway forming, and according to the characteristics of the central parallel air shaft, the working faces of the extraction area penetrate through the upper mountain of the track and are scrapped in sections along with the alternation of the working faces. The method realizes that the inner part of the mining area is completely free of coal pillars, and the coal recovery rate is improved; the well field adopts a central parallel ventilation mode, the rail can be scrapped in sections along with the alternation of working faces, the maintenance cost of the roadway is further saved, and the utilization efficiency of the underground roadway is maximized.
Description
Technical Field
The invention relates to the field of coal mining, in particular to a method for scrapping mountain climbing or large roadway sections during continuous mining of underground coal resources.
Background
At present, the well fields in China are mainly partitioned or zonal, when working faces are arranged in mining areas or zones, at least 20-40m of protective coal pillars are reserved between the upper mountains and on two sides of a main roadway, and if a common mining area descending or zonal retreating mining method is adopted, the protective coal pillars between the upper mountains and the protective coal pillars on two sides of the main roadway are difficult to completely recover, so that certain coal loss exists. Even if the upward-going mining area or the forward-advancing mining area is adopted, the protective coal pillars on two sides of the upward mountain or the large roadway can be recovered after the recovery of the last working face is finished, but the mode has no universality.
Meanwhile, the roadways of the conventional working faces in the mining area or the belt area are all arranged at the same position, about 20m coal pillars are generally reserved between the working faces, and the coal pillars for protecting the roadways are regarded as permanently lost coal pillars, so that a large amount of coal resources in the mining area are lost.
In summary, in underground mining, coal loss includes coal pillars between working faces, coal pillars on both sides of a mountain or a large lane, and coal pillars between the mountain or the large lane, and the mining rate of mine works in China is less than 50%, but the problem of underground mining is not limited to the mining rate, when a working face is propelled towards the mountain or the large lane, a withdrawal channel needs to be arranged at the outer end of the coal pillars on the side of the mountain or the large lane close to the working face, a common method includes brushing a large wall, a single withdrawal channel and a double withdrawal channel, wherein the double withdrawal channel has the most advancement, that is, two tunnels with parallel working faces are excavated along the outer end of the coal pillars, the distance between the tunnels is generally about 20m, a connecting lane is arranged between the two lanes at an interval of 30-50m, equipment withdrawal is carried out after the working face is propelled towards the outer withdrawal channel, and two withdrawal channels and the connecting lanes are used for multipoint withdrawal. In general, the time consumed for withdrawing mine equipment in China is long, and a withdrawing channel needs to be deployed in advance, so that the tunnel engineering quantity is increased.
In summary, a protective coal pillar and a working face section coal pillar exist in a main roadway or an ascending mine during mining, and a withdrawing channel needs to be arranged when a working face is pushed to the outer end of the protective coal pillar, so that the quantity of roadway engineering is increased, the moving time is increased, more importantly, the residual coal pillar is used as a stress carrier, the surrounding roadway engineering is influenced, particularly high stress is formed in an adjacent coal seam, and the dynamic disaster represented by rock burst is easily caused under the condition. Therefore, the invention aims to solve the problems, and the surrounding well lane is used as a mining roadway and a withdrawing channel during the working face mining period, so that coal pillars on the side of the working face and in the advancing direction are not reserved, and the coal pillar-free penetration is realized.
Disclosure of Invention
Aiming at the technical problems, the invention aims to provide a method for scrapping a mountain or a roadway in sections for continuous mining of underground coal resources according to the arrangement characteristics of central parallel mine air shafts, namely the arrangement characteristics of the central parallel mine air shafts in the advancing direction of a working face, so as to solve the technical limitation problem in the prior art.
In order to achieve the purpose, the invention adopts the following technical scheme:
a method for scrapping a mountain or a large roadway in a continuous mining mode of underground coal resources in a segmented mode comprises the following steps:
a. according to a general mining mode of well field division, a large transportation roadway and a large return air roadway are used for enclosing out of a well field to divide the phase, in the phase, two or three mountaineering areas are used for enclosing out the mining area range, the large return air roadway is used as a return air roadway of a first mining working face, the transportation roadway is tunneled along the top plate of a coal seam on the other side and is also used as an air inlet roadway, and a cut hole is formed by penetrating the transportation roadway and the large return air roadway to prepare for mining;
b. the working face pushes the coal mining forward, a goaf is formed behind the working face, the air return large roadway section at the side of the goaf can be processed according to the position of an air shaft, the mine adopts a central parallel ventilation mode, the air shaft is positioned in front of the working face, and the air return large roadway goaf section can be directly scrapped;
c. the working face is pushed forward to the last coal mining area, namely, when entering the final mining stage, the advanced supporting stress influences the top of the nearest coal mining area, and the technology of adjusting the pushing speed of the working face, controlling the mining height and reinforcing the top roadway is adopted to avoid the damage of the top roadway;
d. the working face is directly communicated with the upper mountain at the near end without leaving an upper mountain protection coal pillar or arranging a special withdrawal roadway, and meanwhile, the working face transportation roadway extends to the upper mountain at the far end and is finally communicated;
e. the side of the return air main roadway penetrating through the rear working face is continuously pushed to the other upper mountain by utilizing a transport roadway extending from the upper part of the stope and the lower end of the stope, the side of the scrapped return air main roadway is provided with a sealing wall, and the pushed upper mountain is also provided with the sealing wall so as to block the air current from flowing to the side of the goaf along the upper mountain;
f. the working face is directly communicated with the other upward mountain, mining is stopped after the working face is communicated, equipment in the upward mountain is directly used for moving, a central parallel ventilation mode is adopted for a mine, the upward mountain is used as an air return route, so that subsection scrapping is selected, a sealing wall is arranged, and air current is blocked from flowing to the mining area side along the upward mountain;
g. a second working face air return roadway is arranged along the first mining working face along the top plate and under the goaf of the transportation roadway, the arrangement mode of the second working face transportation roadway is the same as that of the first mining working face, mining is carried out after the second working face transportation roadway penetrates through the two roadways, the process is the same as the patent protection rights c and d, and the upper parking lot in the patent protection right e is correspondingly adjusted to be a second section parking lot;
h. and repeating the patent protection weight g on the rest of the middle working faces until the last working face, wherein the return air roadway is the same as the patent protection weight g, the large transportation roadway is directly used as an air inlet and transportation roadway of the last mining working face, the working face can be subjected to roof cutting pressure relief roadway forming to keep continuous service after being pushed, or a wall body is built along the side, close to the last mining side, of the large transportation roadway in advance to realize gob-side entry retaining.
The method is preferably suitable for the recovery work of the protective coal pillars between the mountains of the mining area, the protective coal pillars on the two sides of the main roadway and the protective coal pillars between the working faces, and realizes the continuous and completely coal pillar-free mining of underground coal resources in time and space.
Specifically, in the step a, according to a general mining mode of well field division, a large transportation roadway and a large return air roadway are used for enclosing out of a well field to form a division stage, in the division stage, two or three main roads going up the mountain and enclosing a mining area range are used, the large return air roadway is used as a return air roadway of a first mining working face, a transportation roadway is excavated along a coal seam roof on the other side and is also used as an air inlet roadway, and an open cut is formed by penetrating the transportation roadway and the large return air roadway to prepare for mining.
In the step b, the working face is pushed forward to mine coal, a goaf is formed behind the working face, the air return large roadway section on the side of the goaf can be treated according to an air shaft, a central parallel ventilation mode is adopted in a mine, the air shaft is positioned in front of the working face, and the goaf section of the air return large roadway is directly scrapped.
And c, when the working face is pushed forward to the last coal mining area, namely the final mining stage is entered, the advanced supporting stress influences the nearest upward mountain, and the technology of adjusting the pushing speed of the working face, controlling the mining height and reinforcing the upward roadway to achieve the final mining is adopted, so that the damage to the upward roadway is avoided.
And d, directly communicating the working face with the upper mountain at the near end without leaving an upper mountain protection coal pillar and setting a special withdrawal roadway at the end of the working face, and simultaneously extending the working face transportation roadway to the upper mountain at the far end to finally communicate.
And e, continuously pushing the air return main lane side of the run-through working face to the other upward mountain by utilizing a transport lane extending from the upper part of the mining area and the lower end of the mining area, and driving a sealing wall on the scrapped air return main lane side and driving a sealing wall on the pushed upward mountain to block the air current from flowing to the mining area side along the upward mountain.
And f, directly communicating the working face with the other upward mountain, stopping mining after the working face is communicated, directly moving equipment in the upward mountain, selecting a subsection to scrap due to the fact that the mine adopts a central parallel ventilation mode and the upward mountain is used as an air return route, and driving a sealing wall to block air flow from flowing to the mining area side along the upward mountain.
And g, arranging a second working face air return roadway under a conveying roadway goaf along the top plate along the first mining working face, wherein the arrangement mode of the second working face conveying roadway is the same as that of the first mining working face, and mining is carried out after the second working face conveying roadway penetrates through the two roadways, the process is the same as the patent protection rights c and d, and the upper parking lot in the patent protection right e is correspondingly adjusted to be a second section parking lot.
And h, repeating the patent protection weight g on the other middle working faces until the last working face, wherein the return air roadway is the same as the patent protection weight g, the large transportation roadway is directly used as an air inlet and transportation roadway of the non-mining working face, the working face can be pushed through and then subjected to roof cutting and pressure relief to form a roadway to keep continuous service, or a wall body is built along the side, close to the non-mining side, of the large transportation roadway in advance to realize gob-side entry retaining.
The method is preferably suitable for the recovery work of the protective coal pillars between the mountains of the mining area, the protective coal pillars on the two sides of the main roadway and the protective coal pillars between the working faces, and realizes the continuous and completely coal pillar-free mining of underground coal resources in time and space.
Compared with the prior art, the method for scrapping the underground coal resources continuously mined in the mountain climbing or large roadway by sections has the following advantages:
(1) The return air main roadway and the transportation main roadway are used as the stoping roadway, so that the roadway engineering quantity is saved; the transportation is abandoned in sections along with the alternation of the working surface, so that the maintenance cost of the roadway is reduced; because the well field air shaft adopts the central parallel type, the rail can be scrapped in sections along with the alternation of working faces, extra construction is not needed to maintain the stability of the roadway, the engineering quantity and the cost are increased, the maintenance cost of the roadway is further reduced, and the maximization of the utilization value of the roadway is reflected.
(2) Continuous mining in the range of the underground mining area is realized, no protective coal pillars on two sides of a main roadway, no protective coal pillar between the upper mountain and no protective coal pillar between the working faces are arranged in the range of the mining area, and the complete absence of the coal pillars in the mining area is thoroughly realized.
(3) The supporting stress of the continuous working face air return roadway is low, the method of the invention is characterized in that goaf caving gangue is covered on the continuous working face air return roadway, the integration of continuous mining and overlying rock movement between the working faces is realized, the load of the roadway is small, and the stress concentration phenomenon of the adjacent roadway of the continuous working face is avoided from being prominent; meanwhile, the influence of long-time high stress commonly existing in the mine mining up hill or large roadway in China is improved, no coal pillar is communicated, and the mine roadway engineering of the coal seam and the adjacent coal seams is thoroughly liberated.
Drawings
Fig. 1 is a schematic layout of a final mining double-withdrawal channel and a top coal pillar recovery working face of the last working face of the existing mining area.
FIG. 2 is a schematic diagram of an embodiment of a complete pillar-free mining technique for continuous mining of underground coal resources in time and space.
Detailed Description
The embodiments of the present invention will be described with reference to the accompanying drawings.
In the embodiment, in the first step, according to a general mining mode of well field division, a transportation main lane and a return air main lane are used for enclosing out of a well field division stage; in the stage, two or three mountains are used for enclosing the mining area range; and the main return air roadway is used as the return air roadway of the first mining working face, the transportation roadway is tunneled along the coal seam roof at the other side and is also used as the air inlet roadway, and the transportation roadway and the main return air roadway are communicated to form an open cut hole to prepare for mining.
And secondly, pushing the working face forward to mine coal, forming a goaf behind the working face, treating a return air large roadway section at the goaf side according to an air shaft, wherein a central parallel ventilation mode is adopted in a mine, the air shaft is positioned in front of the pushing of the working face, and the goaf section of the return air large roadway can be directly scrapped.
And thirdly, the working face is pushed forward to the last coal mining area, namely when the last mining stage is entered, the advanced supporting stress influences the nearest upward mining, and the technology of adjusting the pushing speed of the working face and controlling the mining height and reinforcing the upward roadway to perform the last mining is adopted, so that the damage to the upward roadway is avoided.
And fourthly, directly communicating the working face with the upper mountain at the near end without leaving an upper mountain protection coal pillar and setting a special withdrawal roadway on the working face, and simultaneously extending the working face transportation roadway to the upper mountain at the far end to finally communicate.
And fifthly, continuously pushing the air return main lane side of the run-through rear working face to the other upper mountain by utilizing a transport lane extending from the upper part of the stope and the lower end of the stope, and driving a sealing wall on the scrapped air return main lane side and driving the pushed upper mountain to also drive the sealing wall so as to prevent the air current from flowing to the stope side along the upper mountain.
And sixthly, the working face is directly communicated with the other upward mountain, mining is stopped after the working face is communicated, the equipment in the upward mountain is directly used for moving, the mine adopts a central parallel ventilation mode, the upward mountain is used as an air return route, so that the subsection scrapping is selected, a sealing wall is arranged, and air current is blocked from flowing to the mining area side along the upward mountain.
And seventhly, arranging a second working face air return roadway below a gob of a transportation roadway along the top plate along the first mining working face, wherein the arrangement mode of the second working face transportation roadway is the same as that of the first mining working face, and mining is carried out after the second working face transportation roadway penetrates through the two roadways, the process is the same as the patent protection rights c and d, and the upper parking lot in the patent protection right e is correspondingly adjusted to be a second section parking lot.
And eighthly, repeating the patent protection weight g on the other middle working faces until the last working face, wherein the return air roadway is the same as the patent protection weight g, the large transportation roadway is directly used as an air inlet and transportation roadway of the non-mining working face, the working face can be pushed through and then subjected to roof cutting and pressure relief to form a roadway to keep continuous service, or a wall body is built on one side, close to the non-mining side, of the large transportation roadway in advance to realize gob-side entry retaining.
Claims (9)
1. The method for scrapping the underground coal resources continuously mined in the mountain climbing or large roadway section is characterized by comprising the following steps of:
a. according to a general mining mode of well field division, a transportation main lane and an air return main lane are used for enclosing out of a well field division stage, in the stage, two or three mountaineering and mining area ranges are used for enclosing out, the air return main lane is used as an air return lane of a first mining working face, the other side of the air return main lane is used for tunneling a transportation lane along a coal seam roof and is also used as an air inlet lane, and an open cut hole is formed by penetrating the transportation lane and the air return main lane to prepare for mining;
b. the working face is pushed forward to mine coal, a goaf is formed behind the working face, the return air large roadway section on the goaf side can be processed according to the position of an air shaft, the mine adopts a central parallel ventilation mode, the air shaft is positioned in front of the pushing of the working face, and the return air large roadway goaf section can be directly scrapped;
c. the working face is forwards pushed to the last coal mining area, namely, when entering the final mining stage, the advance supporting stress influences the beginning of the upward mining with the nearest distance, and the technology of adjusting the pushing speed of the working face, controlling the mining height and reinforcing the upward mining roadway is adopted to avoid the damage of the upward mining roadway;
d. the working face is directly communicated with the upper mountain at the near end without leaving an upper mountain protection coal pillar and arranging a special withdrawal roadway, and meanwhile, the working face transportation roadway extends to the upper mountain at the far end and is finally communicated;
e. the air return main roadway side of the run-through working face continuously pushes the air return main roadway to the other upper mountain by utilizing the train yard at the upper part of the mining area and the transportation roadway extending from the lower end of the mining area, the scrapped air return main roadway side is provided with a sealing wall, and the pushed upper mountain is also provided with the sealing wall so as to block the air current from flowing to the mining area side along the upper mountain;
f. the working face is directly communicated with the other upward mountain, mining is stopped after the working face is communicated, equipment in the upward mountain is directly used for moving, and the mine adopts a central parallel ventilation mode, the upward mountain is used as an air return route, so that upward laneways can be selectively scrapped in sections, a sealing wall is arranged, and air current is blocked from flowing to the mining area side along the upward mountain;
g. a second working face air return roadway is arranged along the first mining working face along the top plate and under the goaf of the transportation roadway, the arrangement mode of the second working face transportation roadway is the same as that of the first mining working face, mining is carried out after the second working face transportation roadway penetrates through the two roadways, the process is the same as the patent protection rights c and d, and the upper parking lot in the patent protection right e is correspondingly adjusted to be a second section parking lot;
h. and repeating the patent protection weight g on the rest working faces in the middle of the mining area until the last working face, wherein the return air roadway is the same as the patent protection weight g, the large transportation roadway is directly used as an air inlet and transportation roadway of the last mining working face, and the working face can be pushed through and then subjected to roof cutting pressure relief to form a roadway to be reserved for continuous service or realize gob-side entry retaining of the large transportation roadway along with the mining and masonry wall.
2. The method for scrapping in mountain climbing or roadway sections for continuous mining of underground coal resources as claimed in claim 1, wherein in the step a, according to a mining mode common to well field division, the transportation roadway and the air return roadway are used for enclosing out of the division stage in the well field; in the stage, two or three mountains are used for enclosing the mining area range; and the main return air roadway is used as the return air roadway of the first mining working face, the transportation roadway is tunneled along the coal seam roof at the other side and is also used as the air inlet roadway, and the transportation roadway and the main return air roadway are communicated to form an open cut hole to prepare for mining.
3. The method for scrapping the section of the uphill or the large roadway for the continuous mining of the underground coal resources as claimed in claim 1, wherein in the step b, the working face is pushed forwards to mine coal, a goaf is formed behind the working face, the section of the large return air roadway at the side of the goaf can be treated according to the position of an air shaft, the mine adopts a central parallel ventilation mode, the air shaft is positioned in front of the pushing of the working face, and the section of the large return air roadway is scrapped directly.
4. The method for scrapping in sections of the ascending or large roadway for continuous mining of underground coal resources as claimed in claim 1, wherein in the step c, when the working face is advanced to the final coal mining area, that is, when the working face enters the final mining stage, the advance supporting stress influences the ascending beginning closest to the working face, and the technologies of adjusting the advancing speed of the working face, controlling the mining height and reinforcing the ascending roadway to the final mining are adopted to avoid the damage to the ascending roadway.
5. The method for scrapping in sections of the ascending or descending roadway for continuous mining of underground coal resources as claimed in claim 1, wherein in the step d, the working face is directly communicated with the ascending at the near end without leaving an ascending protection coal pillar and without arranging a special withdrawal roadway, and meanwhile, the working face haulage roadway is extended to the ascending at the far end and finally communicated.
6. The method for scrapping the upward slope or the large roadway for continuous mining of underground coal resources as claimed in claim 1, wherein in the step e, the side of the through-going back face air return large roadway is continuously pushed to the other upward slope by using a haulage roadway extending from the upper part of the stope and the lower end of the stope, the side of the scrapped air return large roadway is provided with a sealing wall, the pushed upward slope is also provided with a sealing wall, and the air current is blocked from flowing from the upward slope to the goaf side.
7. The method for scrapping the upper mountain or the large roadway section of the underground coal resource continuous mining according to claim 1, wherein in the step f, the working face is directly communicated with the other upper mountain, mining is stopped after the working face is communicated, equipment in the upper mountain is directly used for moving, a central parallel ventilation mode is adopted for a mine, the upper mountain is used as a return air route, so that section scrapping is selected, a sealing wall is arranged, and air flow is blocked from flowing to the goaf side along the upper mountain.
8. The method for scrapping in ascending or descending roadway sections for continuous mining of underground coal resources according to claim 1, wherein in the step g, the second face return air roadway is arranged along the first mining face along the top plate under the goaf of the haulage roadway, the arrangement mode of the second face haulage roadway is the same as that of the first mining face, the haulage is performed after the second face haulage roadway penetrates through the first mining face, the process flow is the same as that of the patent protection rights c and d, and the upper parking lot in the patent protection right e is correspondingly adjusted to be the parking lot in the second section.
9. The method for scrapping in mountain climbing or large roadway for continuous mining of underground coal resources as claimed in claim 1, wherein in the step h, the patent protection right g is repeated for the rest of the working faces in the middle until the last working face, the return air roadway is the same as the patent protection right g, the transportation roadway is directly used as the air inlet and transportation roadway of the last mining working face, and after the working face is pushed through, roof cutting pressure relief is adopted to form the roadway for continuous service, or a wall is built along the side of the transportation roadway close to the last mining side in advance to realize gob-side entry retaining.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210794855.0A CN115234238A (en) | 2022-07-05 | 2022-07-05 | Method for scrapping ascending or large roadway in sections for continuous mining of underground coal resources |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210794855.0A CN115234238A (en) | 2022-07-05 | 2022-07-05 | Method for scrapping ascending or large roadway in sections for continuous mining of underground coal resources |
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| CN115234238A true CN115234238A (en) | 2022-10-25 |
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| CN202210794855.0A Pending CN115234238A (en) | 2022-07-05 | 2022-07-05 | Method for scrapping ascending or large roadway in sections for continuous mining of underground coal resources |
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- 2022-07-05 CN CN202210794855.0A patent/CN115234238A/en active Pending
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