CN110469329B - Mining method at last stage of mine stoping - Google Patents
Mining method at last stage of mine stoping Download PDFInfo
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- CN110469329B CN110469329B CN201810443949.7A CN201810443949A CN110469329B CN 110469329 B CN110469329 B CN 110469329B CN 201810443949 A CN201810443949 A CN 201810443949A CN 110469329 B CN110469329 B CN 110469329B
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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
- E21C41/16—Methods of underground mining; Layouts therefor
- E21C41/18—Methods of underground 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
- E21F1/00—Ventilation of mines or tunnels; Distribution of ventilating currents
- E21F1/006—Ventilation at the working face of galleries or tunnels
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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
- E21F13/00—Transport specially adapted to underground conditions
Abstract
The invention discloses a mining method at the last stage of mine stoping, which comprises the following steps of: determining adjacent working faces, and respectively digging at two sides of the working faces to form an adjacent return airway for returning air and an adjacent belt airway for transportation; forming a total return air channel for return air of adjacent working faces and return air at the last stage of a mine by using the existing roadway; forming a return air ascending mountain with the near end communicated with the main return air channel; forming a track passage between the existing transportation lane and the return air mountain, wherein the existing transportation lane has the same direction with the adjacent working face and the shortest distance with the adjacent working face; a return air passage is formed between the return air ascending and the adjacent return air lanes, so that the adjacent return air lanes are communicated with the total return air channel through the return air passage and the return air ascending, and return air is provided for the adjacent working surfaces through the total return air channel; and (5) carrying out coal mining on the adjacent working faces. The method of the invention simplifies the production system, reduces the moving times of the working face, improves the resource recovery rate, reduces the production cost and improves the economic benefit.
Description
Technical Field
The invention relates to the technical field of mining, in particular to a mining method at the last stage of mine stoping.
Background
For the mine at the last stage of the stoping, the mine is mined and enters the deep part of the well field year by year according to the continuous planning of the mining of the mine, and the service life of the rest stoping area is very short. Because the stoping trend length of the stoping area at the last stage of stoping is shorter, the stoping reserve is less, the stoping period is short, if a production system required by the mining of a working face needs to be newly arranged according to the stoping method of the prior stoping area, the production cost is high, and the safety production management difficulty is high.
Disclosure of Invention
The invention aims to overcome the defects and provide a mining method at the last stage of mine stoping, which simplifies a production system, reduces the moving times of a working face, improves the resource recovery rate, reduces the production cost and improves the economic benefit.
To achieve the above object of the present invention, the present invention provides a mining method at an end of mining of a mine, the mine at the end of mining comprising: a plurality of goafs formed by a plurality of stoped working faces for a plurality of existing haulage roadways, existing belt roadways, existing haulage goafs, existing auxiliary downhill roadways, existing main return airway, existing return goafs, and areas to be stoped of the stoped working faces, wherein the mining of the areas to be stoped comprises the steps of:
determining an adjacent working face to be stoped, which is adjacent to the last working face stoped, in the area to be stoped according to the coal bed condition of the area to be stoped;
after the adjacent working faces are determined, respectively digging at two sides of the adjacent working faces along the direction of the trend of the adjacent working faces to form an adjacent return airway for returning air and an adjacent belt airway for transportation;
according to the optimal distance principle, the existing auxiliary downhill laneway, the existing transportation laneway and the existing total return air which are close to the adjacent working faces and have the shortest distance with the adjacent working faces are communicated, so that a total return air channel of return air of the adjacent working faces and total return air at the last stage of a mine is formed;
the adjacent return air lanes are respectively communicated with the main return air channel so as to provide return air for the adjacent return air lanes through the main return air channel;
and (4) carrying out coal mining on adjacent working faces with the aid of the roadways.
Wherein, be linked together adjacent return air lane, adjacent belt lane and total return air passageway respectively, include the following step:
forming a return air ascending mountain with the near end communicated with the total return air channel at the same time of or after the total return air channel is formed;
according to the optimal distance principle, a track passage is formed between the existing transportation lane and the return air ascending mountain, wherein the existing transportation lane and the adjacent working face are consistent in direction and shortest in distance, and the track passage is used as an auxiliary transportation channel of the adjacent working face;
and a return air passage is formed between the return air ascending and the adjacent return air lanes, so that the adjacent return air lanes are communicated with the total return air channel through the return air channel and the return air ascending, and return air is provided for the adjacent working surfaces through the total return air channel.
Preferably, the return air passage is communicated with the proximal end of the adjacent return air lane, and the extending direction of the return air passage and the extending direction of the adjacent return air lane form an included angle larger than 0 °.
Preferably, one end of the return air ascending is communicated with the main return air channel, the middle part of the return air ascending is communicated with the return air passage, and an included angle larger than 0 degree is formed between the extending direction of the return air passage and the extending direction of the return air passage.
Preferably, the rail path is parallel to the return air path.
After determining the area to be stoped and the adjacent working face adjacent to the stoped previous working face in the stoping area, determining whether an island working face formed by surrounding of a plurality of goafs exists in the area to be stoped, and if the island working face exists, adopting a single-wing mining method to carry out coal stoping on the island working face.
Preferably, when coal mining is carried out on the island working face, an island return airway for air return and an island belt airway for transportation are respectively formed by digging at two sides of the island working face along the trend of the island working face.
After the island air return roadway is formed, one end of the island air return roadway is communicated with the return air ascending mountain, so that the island air return roadway is communicated with the main return air channel through the return air ascending mountain, and return air is provided for the island working surface through the main return air channel.
After the island belt lane is formed, the near end of the island belt lane is connected with the existing transportation stone gate so as to form an air inlet and coal transportation channel of the island mining working face.
After the island belt lane is formed, the middle part of the island belt lane is communicated with the near end of the adjacent belt lane, so that the adjacent belt lane is communicated with the existing transportation stone gate through the island belt lane, and an air inlet and coal transportation channel of the adjacent working face is formed.
Compared with the prior art, the mining method at the last stage of mine stoping has the following beneficial effects:
the mining method at the last stage of mine stoping fully utilizes the existing roadway laid when stoping is performed, simplifies the production system, reduces the moving times of the working face, improves the resource recovery rate, reduces the production cost and improves the economic benefit.
The present invention will be described in detail with reference to the accompanying drawings.
Drawings
FIG. 1 is a schematic diagram of a production system deployed for a mine at the last stage of stoping according to a prior stoping method;
fig. 2 is a schematic diagram of a production system deployed for a mine at the end of a certain back-mining period by using the mining method of the present invention.
Detailed Description
Fig. 1 is a schematic diagram of a production system for mine laying at a certain final mining stage according to the existing mining area mining method, and fig. 2 is a schematic diagram of a production system for mine laying at a certain final mining stage by adopting the mining method of the present invention.
Wherein, the mine at the last stage of the stoping comprises: and a plurality of goafs formed by a plurality of stoped working faces and used for a plurality of existing transportation roadways, existing belt roadways, existing transportation stone doors, existing auxiliary descending roadways, existing main return airway, existing return air stone doors and areas to be stoped of the stoped working faces.
In the prior art, the same coal mining method as that of the mined area is also adopted for the mined area to be stoped of the mine at the last stage of the stoping, for example, for a certain coal mine in the embodiment, the mined area is mined by double-wing coal mining from top to bottom, and the working face is mined by a fully caving method of strike long-wall fully mechanized top coal mining. According to the method in the prior art, as a production system required to be arranged for mining of a mine at the last stage of stoping is shown in figure 1, the arrangement of visible roadways is complex, the production system arrangement production cost is high during mining, the safety production management difficulty is high, and in order to avoid the problems, the invention adopts the following method to mine the area to be stoped of the mine at the last stage of stoping:
determining an adjacent working face to be stoped, which is adjacent to the last working face stoped, in the area to be stoped according to the coal bed condition of the area to be stoped;
after the adjacent working faces are determined, respectively digging at two sides of the adjacent working faces along the direction of the trend of the adjacent working faces to form an adjacent return airway for returning air and an adjacent belt airway for transportation;
according to the optimal distance principle, an existing auxiliary downhill roadway for auxiliary transportation, an existing transportation roadway for transportation and an existing total return air for total return air in a recovered area which is close to an adjacent working face and has the shortest distance with the adjacent working face are communicated so as to form a total return air channel for the adjacent working face return air of an area to be recovered and the total return air at the last stage of a mine;
the adjacent return air lanes are communicated with the total return air channel so as to provide return air for the adjacent return air lanes through the total return air channel, and therefore return air is provided for the adjacent working faces;
and (4) carrying out coal mining on adjacent working faces with the aid of the roadways.
Wherein, be linked together adjacent return airway and total return air passageway, include the following step:
forming a return air ascending mountain with the near end communicated with the total return air channel at the same time of or after the total return air channel is formed;
according to the optimal distance principle, a track passage is formed between the existing transportation lane and the return air ascending mountain, wherein the existing transportation lane and the adjacent working face are consistent in direction and shortest in distance, and the track passage is used as an auxiliary transportation channel of the adjacent working face;
and a return air passage is formed between the return air ascending and the adjacent return air lanes, so that the adjacent return air lanes are communicated with the total return air channel through the return air channel and the return air ascending, and return air is provided for the adjacent working surfaces through the total return air channel.
Specifically, the mining method of the present invention comprises the steps of:
s01, determining an adjacent working face adjacent to the last working face which is mined in the area to be mined according to the coal bed condition of the area to be mined;
the coal seam condition of the area to be mined comprises the following steps: the dip angle of the coal bed, whether the coal bed contains the gangue or not, the thickness of the gangue, the lithology, the recovery rate and the like. And determining an adjacent working face adjacent to the last working face mined according to the coal seam condition, wherein the adjacent working face is generally parallel to the last working face.
And determining the adjacent working faces, wherein the determining of the adjacent working faces comprises determining the mining strike length, the average inclination length, the average thickness of the coal bed, the average inclination angle, the volume weight, the mining reserves of the working faces and other information of the adjacent working faces.
S02, after the adjacent working faces are determined, digging at two sides of the adjacent working faces along the direction of the adjacent working faces respectively to form an adjacent return airway for return air and an adjacent belt airway for transportation;
after the adjacent working faces are determined, along the direction of the adjacent working faces, an adjacent air return lane for returning air is formed on one side of the adjacent working faces, and an adjacent belt lane for transportation is formed on the other side of the adjacent working faces. Wherein, the method for forming the adjacent return airway and the adjacent belt airway can adopt the method of the prior art.
When the adjacent return airway is formed, the return airway is required to be communicated with a main return air system of the mine.
S03, according to the optimal distance principle, communicating the existing auxiliary downhill roadway, the existing transportation roadway and the existing total return air which are close to the adjacent working faces and have the shortest distance with the adjacent working faces so as to form a total return air channel of the return air of the adjacent working faces and the total return air at the last stage of a mine;
after the adjacent return air lanes and the adjacent belt lanes are formed, according to the optimal distance principle, the existing auxiliary downhill lanes for auxiliary transportation, the existing transportation lanes for transportation and the existing total return air for the total return air, which are close to the adjacent working faces and have the shortest distance with the adjacent working faces, in the recovered area are communicated, so that a total return air channel for return air of the adjacent working faces and the total return air at the last stage of a mine is formed.
When being linked together current supplementary downhill path, current transportation lane and current total return air, need reform transform current supplementary downhill path, current transportation lane according to the condition of adjacent working face to the installation is indispensable in two roadways provides the return air system, when making the tunnel reform transform into total return air passageway, does benefit to and provides the return air.
S04, forming a return air ascending mountain with the near end communicated with the total return air channel at the same time or after the total return air channel is formed;
at the same time of forming the total return air channel or after forming the total return air channel, a return air ascending mountain whose proximal end is communicated with the total return air channel is dug to be used as a return air ascending channel.
The near end of the return air ascending mountain is communicated with the main return air channel, and the extending direction of the joint of the near end of the return air ascending mountain and the main return air channel is vertical to the extending direction of the main return air channel.
S05, according to the distance optimization principle, a track passage is formed between the existing transport lane and the return air mountain-climbing device, wherein the existing transport lane and the return air mountain-climbing device are consistent in direction and shortest in distance with the adjacent working faces, and the track passage is used as an auxiliary transport channel of the adjacent working faces;
after the return air is formed to ascend a mountain, according to the optimal distance principle, a track passage is formed between the existing transportation lane and the return air ascending mountain, wherein the existing transportation lane and the return air ascending mountain are consistent in direction and shortest in distance with the adjacent working faces, and the track passage is used as an auxiliary transportation channel during the stoping of the adjacent working faces.
Wherein, an included angle which is larger than 0 degree and smaller than 90 degrees is formed between the extending direction of the track passage and the extending direction of the return air ascending mountain.
S06, forming a return air passage between the return air ascending mountain and the adjacent return air lane, so that the adjacent return air lane is communicated with the total return air channel through the return air passage and the return air ascending mountain, and the total return air channel provides return air for the adjacent working face;
after the roadways are laid, a return air passage is formed between the return air ascending mountain and the adjacent return air roadway, so that the adjacent return air roadway is communicated with the total return air channel through the return air passage and the return air ascending mountain, and return air is provided for the adjacent working faces through the total return air channel.
One end of the return air passage is communicated with the adjacent return air lane, the other end of the return air passage is communicated with the middle part of the return air upward mountain, and an included angle which is larger than 0 degree and smaller than 90 degrees is formed between the extending direction of the return air passage and the extending direction of the return air upward mountain. Preferably, the track path is parallel to the return air path.
And S07, utilizing the roadways to carry out coal mining on the adjacent working faces.
If the previous working face adopts any mining method according to the mining method of the previous mining area, the mining method is also adopted by the adjacent working face, and if the double-wing mining is adopted in the past, the double-wing mining is also adopted by the adjacent working face.
However, if the double-wing mining is adopted, in addition to the fact that the number of times of moving the working faces is large and the production cost is high, mining stop lines need to be respectively arranged between the two opposite working faces when the double-wing mining is adopted, so that the quantity of coal pillars going up the mountain reserved at the joint of the two working faces is large, the resource recovery rate is low, and the economic benefit is poor. In addition, the adjacent working face double-wing mining (and island working face mining) system adopts a mining sequence from a near end to a far end for mining at the end of a mine, and the difficulty of safe production management is high. Therefore, the invention adopts single-wing mining to carry out coal mining.
It should be noted that the term "proximal" as referred to herein refers to the end near the mine shaft yard and "distal" refers to the end away from the mine shaft yard.
It should be further noted that after determining the area to be stoped and the adjacent working face adjacent to the last working face stoped in the stoping area, it is further determined whether an island working face (i.e., a deep island triangular coal pillar in fig. 1, and a 3506 working face in fig. 2) surrounded by a plurality of goafs exists in the area to be stoped, and if an island working face exists, the production system is laid by using the following method:
an island air return roadway for air return and an island belt roadway for transportation are respectively formed on two sides of the island working surface along the trend of the island working surface;
after an island air return roadway is formed, one end of the island air return roadway is communicated with an air return ascending mountain so as to be communicated with a main air return channel through the air return ascending mountain and provide return air for an island working surface through the main air return channel;
after an island belt roadway is formed, the near end of the island belt roadway is connected with the existing transportation stone gate so as to form an air inlet and coal transportation channel of an island mining working face;
after the island belt lane is formed, the middle part of the island belt lane is communicated with the near end of the adjacent belt lane of the adjacent working surface, so that the adjacent belt lane is communicated with the existing transportation stone gate through the island belt lane to form an air inlet and coal transportation channel of the adjacent working surface;
and (5) carrying out coal mining on the island working surface by adopting a single wing mining method.
If the island working face exists, the production system for stoping the island working face needs to be arranged together with the production system for stoping the adjacent working face.
The following describes the layout of each roadway in the production system by the mining method of the present invention, taking the last stage of mining of a certain mine as an example (as shown in fig. 2).
Wherein, the three mining areas which have been stoped adopt double-wing mining, the last working face is 3503 and 3504 working faces, and the working faces adjacent to the 3503 and 3504 working faces are 3505 'and 3506' working faces in fig. 1, respectively, if the method in the prior art is adopted, the 3505 'and 3506' working faces are mined by adopting a double-wing mining method, which causes great waste of resources. In the invention, the mining scheme is optimized to obtain the production system layout diagram shown in fig. 2, the 3505 'working face and the 3506' working face are integrated into a 3505 working face in fig. 2, the 3505 working face comprises 3505A and 3505B, the island working face is 3506 working face, and other related existing roadways can refer to the roadways shown in fig. 2.
The remaining continuous working faces in the last mine period are three mining areas 3505 working faces and 3506 working faces, 2 mining areas are counted, a coal mining layer is 5 layers, the geological structure is simple, the occurrence of the coal layer is stable, the dip angle of the coal layer is 20-32 degrees, the average dip angle is 21.5 degrees, the coal layer contains 2-3 layers of sandwiched rock, the thickness of the sandwiched rock is 0.06-0.3 m, and the lithology is grey argillite and black carbon argillite. The recovery rate is 85%, and the calculated recoverable resource reserve is 361.7 ten thousand tons, wherein:
3505A working face design with mining strike length 1121m, average inclined length 135m, average coal seam thickness 12.2m,the average inclination angle is 21.5 degrees, and the volume weight is 1.39t/m3The working face can collect and store 218.1 ten thousand tons. 3505B working face design has mining strike length 413m, average inclined length 135m, average coal seam thickness 12.2m, average dip angle 21.5 deg., and volume weight 1.39t/m3The working face can collect 80.4 ten thousand tons of reserves. 3506 the average thickness of coal seam on working face is 14.5m, the average dip angle is 6.5 deg., and the bulk density is 1.39t/m3The recoverable storage capacity is 63.2 ten thousand tons; the inclined shaft penetrates through the triangular coal pillar and is positioned at the deep part of the well field, and three surfaces of the inclined shaft are adjacent to the goaf to form an island coal pillar at the deep part of the well field, namely a 3506 working surface is arranged.
The coal seam of the mine has low gas content, no abnormal gas gushing phenomenon and is a low-gas mine.
If 3505 (3505A and 3505B are used as 3505 working faces because the directions are basically consistent) the working face utilizes the original three downhill production systems in the three mining areas, although the conditions of twin-wing mining are provided, it is not beneficial to twin-wing mining, and the following reasons are mainly included. Firstly, the moving times of the double-wing mining are 1 more than that of the single-wing mining working face; secondly, the working face 3505A has short mining strike length of 413m, has less mining reserves of 80.4 ten thousand tons, can be withdrawn when the mining period is less than 5 months, and has higher production cost; thirdly, 33.9 ten thousand tons of coal pillars are reserved during double-wing mining; fourthly, the production system needs to be rearranged on the working face of the residual deep triangular coal pillar region 3506 after the double-wing mining, and the mining sequence from the near end to the far end is changed at the last stage of the mine, so that the difficulty of safe production management is high.
Therefore, by analyzing and researching the production conditions and existing problems at the later stage of the well field, aiming at simplifying the production system, reducing the frequency of moving the working face, improving the resource recovery rate, reducing the production cost, improving the economic benefit and creating conditions for safe production and organization management at the later stage of the mine, a single-wing mining scheme is adopted for the adjacent working face 3505 adjacent to the stoped working face and the formed island working face 3506, and the scheme adopted by the invention is described as follows according to the sequence of roadway layout and mining.
3505 the working face is optimally designed to be single wing mining from double wing mining, and is propelled from the well field boundary to the direction of the bottom-hole train yard. The roadway layout conditions are as follows: 3505 and 3506 work surface production system redesign, joint deployment, tunnel layout is set as: 3505 the production system of working face needs to arrange a track passage 93 meters, which is responsible for auxiliary transportation; the air return passage is 126 meters and is a 3505 working surface air return roadway; 3506 the belt lane is directly communicated with 1100 transportation stone gate, and is responsible for air intake and coal transportation task of 3505 and 3506 working surface; arranging return air to ascend the mountain and account for 230 meters, modifying (maintaining) a return air system 1190 to assist a downhill-1140 transport lane to be communicated with 1190 total return air, accounting for 330 meters, and taking on the tasks of 3505 and 3506 coal face return air and total return air at the last stage of a mine; 3506 the transportation gate is directly connected with 1100 transportation stone door, and is responsible for air intake and coal transportation task of 3505B working face and 3506 working face.
Double-wing mining is changed into single-wing mining, a transportation and air return system at the last stage of a mine is simplified, an original 1100 transportation roadway and an 1100 material transportation roadway are closed and are not used any more, and raw coal and auxiliary transportation are only carried by an 1100 train yard and a stone gate near a shaft bottom train yard; withdrawing the three-district substation, wherein the 1100 central substation takes on the functions of the district substation; after the mine air return system is optimized, the 1100 and 1190 air return system is closed; the production system at the later stage of the mine is simple and only comprises a shaft, a shaft bottom yard, a stone door, a shaft bottom 100 central substation, a 1100 central drainage system and a mine total return air system. The optimized arrangement of the working face at the end of the mine is shown in figure 2.
Compared with the prior art, the mining method at the last stage of mine stoping has the following beneficial effects:
the mining method at the later stage of mine stoping fully utilizes and reforms the existing roadway laid when stoping is performed, simplifies a production system, reduces the moving times of a working face, improves the resource recovery rate, reduces the production cost and improves the economic benefit.
Although the present invention has been described in detail, the present invention is not limited thereto, and those skilled in the art can modify the principle of the present invention, and thus, various modifications made in accordance with the principle of the present invention should be understood to fall within the scope of the present invention.
Claims (9)
1. The mining method at the last mining stage of the mine comprises the following steps: a plurality of collecting space areas that form by a plurality of working faces that have been stoped for many existing haulage drifts, current belt drift, current haulage goaf, current supplementary downhill path, current total return airway, current return air goaf of stoped working face to and treat the stoping region, its characterized in that, treat the stoping region to exploit including the following step:
determining an adjacent working face to be stoped, which is adjacent to the last working face stoped, in the area to be stoped according to the coal bed condition of the area to be stoped;
after the adjacent working faces are determined, respectively digging at two sides of the adjacent working faces along the direction of the trend of the adjacent working faces to form an adjacent return airway for returning air and an adjacent belt airway for transportation;
according to the optimal distance principle, the existing auxiliary downhill roadway, the existing transportation roadway and the existing main return airway which are close to the adjacent working faces and have the shortest distance with the adjacent working faces are communicated, so that a main return air channel for return air of the adjacent working faces and main return air at the last stage of a mine is formed;
respectively communicating the adjacent return air lanes, the adjacent belt lanes and the total return air channel so as to provide return air for the adjacent return air lanes and the adjacent belt lanes through the total return air channel;
under the assistance of the roadways, carrying out coal mining on the adjacent working faces;
the method is characterized in that adjacent return air lanes, adjacent belt lanes and a total return air channel are respectively communicated, and the method comprises the following steps:
forming a return air ascending mountain with the near end communicated with the total return air channel at the same time of or after the total return air channel is formed;
according to the optimal distance principle, a track passage is formed between the existing transportation lane and the return air ascending mountain, wherein the existing transportation lane and the adjacent working face are consistent in direction and shortest in distance, and the track passage is used as an auxiliary transportation channel of the adjacent working face;
and a return air passage is formed between the return air ascending and the adjacent return air lanes, so that the adjacent return air lanes are communicated with the total return air channel through the return air channel and the return air ascending, and return air is provided for the adjacent working surfaces through the total return air channel.
2. The mining method of claim 1, wherein the return air passage communicates with the proximal end of the adjacent return air lane, and has an angle greater than 0 ° with respect to the direction of extension of the adjacent return air lane.
3. The mining method as claimed in claim 2, wherein one end of the return air rising upward is communicated with the main return air channel, the middle part of the return air rising upward is communicated with the return air passage, and the extending direction of the return air rising upward and the extending direction of the return air passage form an included angle larger than 0 degrees.
4. The mining method of claim 1, wherein the rail path is parallel to the return air path.
5. The mining method according to claim 1, wherein after determining the area to be stoped and the adjacent working face in the stoping area adjacent to the stoped previous working face, determining whether an island working face formed by surrounding a plurality of goafs exists in the area to be stoped, and if the island working face exists, performing coal stoping on the island working face by using a single wing mining method.
6. The mining method of claim 5, wherein when coal is recovered from the island face, an island return air roadway for return air and an island belt roadway for transportation are respectively dug at two sides of the island face along the direction of the island face.
7. The mining method according to claim 6, wherein after the island return airway is formed, one end of the island return airway is communicated with the return air ascending mountain so as to be communicated with the main return air channel through the return air ascending mountain, and return air is provided for the island working surface through the main return air channel.
8. The mining method of claim 7, wherein after the island belt roadway is formed, the near end of the island belt roadway is connected with the existing haulage stone gate so as to form an air intake and coal transportation channel of the island mining working face.
9. The mining method of claim 8, wherein after the formation of the island belt lane, the middle part of the island belt lane is communicated with the near end of the adjacent belt lane, so that the adjacent belt lane is communicated with the existing haulage gate through the island belt lane to form an air inlet and coal transportation channel of the adjacent working face.
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| CN105041319A (en) * | 2015-08-25 | 2015-11-11 | 袁伟昊 | Mine colliery lane manless working face and filling mining method |
| CN105298496B (en) * | 2015-12-17 | 2018-02-27 | 冀中能源集团有限责任公司 | Complete adopt of reserved working face coal column is set to fill coal-mining method entirely |
| CN106121646A (en) * | 2016-08-22 | 2016-11-16 | 中煤西安设计工程有限责任公司 | Underground mine exploiting field formula without digging laneway without coal column coal-mining method |
| CN107725053B (en) * | 2017-11-08 | 2019-04-05 | 山东科技大学 | Lane is reserved for one's own use without pillar mining method in exploiting field suitable for gently inclined seam |
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2018
- 2018-05-10 CN CN201810443949.7A patent/CN110469329B/en active Active
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