CN114233293B - Method for mining coal pillar without section and filling solid waste in coal mine - Google Patents
Method for mining coal pillar without section and filling solid waste in coal mine Download PDFInfo
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- CN114233293B CN114233293B CN202111335317.7A CN202111335317A CN114233293B CN 114233293 B CN114233293 B CN 114233293B CN 202111335317 A CN202111335317 A CN 202111335317A CN 114233293 B CN114233293 B CN 114233293B
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- 238000011049 filling Methods 0.000 title claims abstract description 270
- 238000005065 mining Methods 0.000 title claims abstract description 110
- 239000003245 coal Substances 0.000 title claims abstract description 85
- 238000000034 method Methods 0.000 title claims abstract description 50
- 239000002910 solid waste Substances 0.000 title claims abstract description 41
- 239000002002 slurry Substances 0.000 claims abstract description 34
- 230000005641 tunneling Effects 0.000 claims abstract description 18
- 239000000463 material Substances 0.000 claims abstract description 17
- 238000004080 punching Methods 0.000 claims abstract description 14
- 239000002699 waste material Substances 0.000 claims abstract description 14
- 239000011343 solid material Substances 0.000 claims abstract description 8
- 238000005520 cutting process Methods 0.000 claims description 10
- 238000009434 installation Methods 0.000 claims description 10
- 238000002360 preparation method Methods 0.000 claims description 10
- 238000000605 extraction Methods 0.000 claims description 7
- 238000012856 packing Methods 0.000 claims 2
- 238000010276 construction Methods 0.000 abstract description 8
- 238000009825 accumulation Methods 0.000 abstract description 5
- 230000006378 damage Effects 0.000 abstract description 5
- 230000007613 environmental effect Effects 0.000 abstract description 5
- 238000011084 recovery Methods 0.000 abstract description 5
- 238000010586 diagram Methods 0.000 description 6
- 239000011435 rock Substances 0.000 description 3
- 239000004566 building material Substances 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 239000003513 alkali Substances 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 239000010881 fly ash Substances 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C41/00—Methods of underground or surface mining; Layouts therefor
- E21C41/16—Methods of underground mining; Layouts therefor
- E21C41/18—Methods of underground mining; Layouts therefor for brown or hard coal
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F15/00—Methods or devices for placing filling-up materials in underground workings
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- 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
- E21F15/08—Filling-up hydraulically or pneumatically
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Remote Sensing (AREA)
- Drilling And Exploitation, And Mining Machines And Methods (AREA)
Abstract
The application discloses a method for mining coal pillars without sections and filling solid wastes in a coal mine, which comprises the following steps: digging a transportation roadway, a rail roadway, a paste filling working face transportation gate way and a paste filling working face rail gate way in a coal mine, paving paste conveying pipelines along the transportation roadway and the paste filling working face transportation gate way, mining one paste filling working face, filling paste made of solid waste materials, mining the long-wall working face adjacent to the paste filling working face, punching the long-wall working face adjacent to the paste filling working face in the direction of a goaf of the first long-wall working face, paving slurry conveying pipelines along the transportation roadway, the paste filling working face transportation gate way and the punching, and filling slurry made of the waste solid materials into the goaf. The mining and solid waste filling method for the coal mine non-section coal pillar can reduce the tunneling construction cost, improve the coal recovery rate, reduce the subsidence of the ground surface and solve the problem of environmental damage caused by waste solid material accumulation.
Description
Technical Field
The application relates to the technical field of mining, in particular to a method for mining a coal mine section-free coal pillar and filling solid wastes.
Background
The total reserves of the coal resources in China are relatively large, but the population of China is numerous, the occupation amount of the coal resources in people is extremely small, the coal resources still dominate in China at present, and along with the exploitation of the coal resources, the exploitation conditions of the coal in China are increasingly complex. In the related art, in the same mining area, a plurality of sections are often divided, and in order to ensure that the next section is not influenced by the mining of the previous section, a part of protection coal pillars are often reserved between the two sections, so that the protection coal pillars in the related art cannot be mined, the coal recovery rate is low, a large amount of solid waste materials such as coal gangue are generated in the mining of the coal mine, a large amount of land resources are occupied by the solid waste materials accumulated on the ground surface, the environment is damaged, and the problem of how to treat the solid waste materials is also solved.
Disclosure of Invention
The present application aims to solve at least one of the technical problems in the related art to some extent.
Therefore, the embodiment of the application provides a method for mining and filling solid waste of a coal mine without section coal pillars, which can reduce the tunneling construction cost and the number of roadways, improve the recovery rate of coal, reduce the subsidence of the earth surface and solve the problems of land resource waste and environmental destruction caused by accumulation of waste solid materials.
According to the method for mining the coal mine non-section coal pillar and filling the solid waste, a mining area comprises a plurality of long wall working surfaces, and a part between the adjacent long wall working surfaces is defined as a paste filling working surface, and the method comprises the following steps: digging a large transportation roadway and a large track roadway in a coal mine, and digging a paste filling working face transportation gate communicated with the large transportation roadway and a paste filling working face track gate communicated with the large track roadway along the paste filling working face; paving paste conveying pipelines along the conveying main roadway and the paste filling working face conveying gateway; dividing each paste filling working surface into a plurality of lane columns; adopting a roadway column mining mode to mine a plurality of roadway columns of one paste filling working face, and filling the mined roadway columns with paste made of solid waste materials by using a paste conveying pipeline; after the paste filling working face is mined and filled, mining the long-wall working face adjacent to the paste filling working face, and then punching holes in the direction from the paste filling working face transportation gate to the goaf of the first long-wall working face; and paving a slurry conveying pipeline along the conveying main roadway, the paste filling working surface conveying gateway and the punching, and filling the slurry made of the waste solid material into the goaf of the long-wall working surface by utilizing the slurry conveying pipeline.
According to the mining and solid waste filling method for the coal mine non-section coal pillar, provided by the embodiment of the application, the paste filling working surface is firstly mined and filled, and then the long-wall working surface is mined, so that coal on the paste filling working surface can be fully collected, the recovery rate of coal resources is improved, the filled paste filling working surface can be utilized to effectively support upper rock, stress concentration is avoided, and surface subsidence is reduced. In addition, the paste conveying pipeline and the slurry conveying pipeline share the roadway, so that the tunneling construction cost and the roadway number can be reduced, and the problems of land resource waste and environmental destruction caused by accumulation of waste solid materials can be solved by adopting solid waste materials for paste and slurry preparation.
In some embodiments, defining the longwall face of the initial mining along the mining direction as a first longwall face, defining a plurality of the longwall faces along the mining direction as a second longwall face, a third longwall face, …, an N-th longwall face in order based on the first longwall face, wherein N is an integer greater than 1, defining the paste filling face adjacent to the first longwall face as a first paste filling face, defining a plurality of the paste filling faces along the mining direction as a second paste filling face, a third paste filling face, …, an N-th paste filling face in order based on the first paste filling face, wherein N is an integer greater than 1, the method further comprising: sequentially mining and filling the first paste filling working face, the second paste filling working face, the third paste filling working face, … and the Nth paste filling working face along a mining direction; and after the extraction and filling of each paste filling working surface are completed, extracting and filling the long wall working surface adjacent to the paste filling working surface.
In some embodiments, taking as an example the extraction and filling of the first paste filling face, the first longwall face, the second paste filling face, and the second longwall face in the extraction and filling order of the paste filling face and the longwall face, the method further comprises: digging a first paste filling working surface track gate way and a first paste filling working surface transport gate way along the first paste filling working surface; and paving a first paste conveying pipeline along the conveying main roadway and the first paste filling working face conveying gateway.
In some embodiments, defining a lane column of the first paste work surface furthest from the transportation lane as a starting mining lane column, the method further comprising: mining the initial mining roadway column; after the exploitation of the initial exploitation roadway column is completed, intermittently exploiting a plurality of roadway columns along the direction approaching to the transportation roadway; and filling the exploited lane columns by using the first paste conveying pipeline.
In some embodiments, the method further comprises: tunneling a first longwall face transportation gate and a cutting hole of the first longwall face while the first paste filling face is mined and filled; and when the mining and filling of the first paste filling working face are finished, the first long-wall working face transportation gateway and the cutting tunneling are finished.
In some embodiments, the method further comprises: driving a second paste filling working surface transportation gate and a second paste filling working surface track gate of a second paste filling working surface while the first paste filling working surface is mined and filled; when the exploitation and filling of the first paste filling working face are finished, the second paste filling working face transportation gateway and the second paste filling working face track gateway tunneling are finished; paving the second paste conveying pipeline along the second paste filling working surface transportation gateway.
In some embodiments, the method further comprises: in the process of mining and filling the first paste filling working face, tunneling a cutting hole of the second long-wall working face, and performing the work of preparing and installing the first long-wall working face; after the first paste filling working face is mined and filled, the hole cutting and tunneling of the second long wall working face are completed, and the installation preparation work of the first long wall working face is completed.
In some embodiments, the method further comprises: after the first paste filling working face is mined and filled, mining the first longwall working face; and after the first long-wall working surface is mined for a certain distance, punching holes in the direction of the first paste filling working surface transportation gate to the goaf of the first long-wall working surface, and paving a first slurry conveying pipeline along the transportation roadway, the first paste filling working surface transportation gate and the punching holes, wherein the first slurry conveying pipeline fills slurry to the goaf of the first long-wall working surface.
In some embodiments, the method further comprises: and (3) simultaneously mining the first longwall face, and beginning to perform roadway column mining and filling on the second paste filling face.
In some embodiments, the method further comprises: and when the second paste filling working surface is mined and filled, performing the installation preparation work of the second long wall working surface, and when the second paste filling working surface is mined and filled, completing the installation preparation work of the second long wall working surface.
In some embodiments, the method further comprises: mining a plurality of roadway columns of the second paste filling working face in an intermittent mining mode, and after the second paste filling working face is mined and filled, starting mining of the second longwall working face; and after the second longwall working surface is mined for a certain distance, punching holes in the direction of the second paste filling working surface transportation gate to the goaf of the second longwall working surface, and paving the second paste conveying pipeline along the transportation roadway, the second paste filling working surface transportation gate and the punching holes, wherein the second paste conveying pipeline fills the paste to the goaf of the second longwall working surface.
Drawings
Fig. 1 is a schematic tunneling diagram of a roadway related to a first paste working face of a coal mine non-section coal pillar mining and solid waste filling method according to an embodiment of the application.
Fig. 2 is a schematic drawing of mining of a first paste face of a coal mine zoneless pillar mining and solid waste filling method according to an embodiment of the application.
Fig. 3 is a schematic drawing of mining and filling of a first paste face of a coal mine zoneless pillar mining and solid waste filling method according to an embodiment of the application.
Fig. 4 is a schematic tunneling diagram of a roadway related to a first longwall face and a second paste face of a method for mining a coal mine non-section coal pillar and filling solid wastes according to an embodiment of the application.
Fig. 5 is a schematic diagram of a first paste filling face filling completion state of a coal mine non-section coal pillar mining and solid waste filling method according to an embodiment of the present application.
Fig. 6 is a schematic drawing of mining of a second paste filling face and a first longwall face of a method for mining a coal mine non-section coal pillar and filling solid wastes according to an embodiment of the present application.
Fig. 7 is a schematic diagram of the filling of the first longwall face of the method for mining a coal mine without section coal pillar and filling solid waste according to an embodiment of the application.
FIG. 8 is a first longwall face goaf filling profile view of a method for mining a coal mine non-section coal pillar and solid waste filling in accordance with an embodiment of the present application.
Fig. 9 is a schematic diagram of a second paste filling face filling completion state of the coal mine non-section coal pillar mining and solid waste filling method according to the embodiment of the application.
FIG. 10 is a schematic drawing of mining and filling of a second longwall face of a method for mining and filling non-section pillars of coal in a coal mine according to an embodiment of the application.
FIG. 11 is a second longwall face goaf filling profile of a method for mining a coal mine non-section coal pillar and solid waste filling in accordance with an embodiment of the present application.
Fig. 12 is a schematic diagram of a coal mine non-section coal pillar mining and solid waste filling method after the first longwall face, the first paste filling face, the second longwall face, and the second paste filling face are mined and filled, according to an embodiment of the application.
Reference numerals:
the first long-wall working face 1, the first paste filling working face 2, the second long-wall working face 3, the second paste filling working face 4, the first paste filling working face transportation gate 5, the first paste filling working face track gate 6, the transportation gate 7, the track gate 8, the paste 9, the slurry 10, the first paste conveying pipeline 11, the first slurry conveying pipeline 12, the gate column 13, the second paste filling working face transportation gate 14, the second paste filling working face track gate 15, the first long-wall working face transportation gate 16, the second paste conveying pipeline 18 and the second slurry conveying pipeline 19.
Detailed Description
Reference will now be made in detail to embodiments of the present application, examples of which are illustrated in the accompanying drawings. The embodiments described below by referring to the drawings are illustrative and intended to explain the present application and should not be construed as limiting the application.
1-12, a mining area comprises a plurality of long wall working surfaces, a part between the adjacent long wall working surfaces is defined to be a paste filling working surface, a large conveying roadway 8 and a large track roadway 7 are excavated in the coal mine, a paste filling working surface conveying gate communicated with the large conveying roadway 8 and a paste filling working surface track gate communicated with the large track roadway 7 are excavated along the paste filling working surface, and then paste conveying pipelines are paved along the large conveying roadway 8 and the paste filling working surface conveying gate. It will be appreciated that the paste filling face track gateway and track roadway 7 may be used to transport building materials (such as supporting frames) and that the paste filling face transport gateway and track roadway 8 may be used to transport coal.
Further, each paste filling working surface is divided into a plurality of lane columns 13, then the lane columns 13 of one paste filling working surface are mined in a lane column mining mode, and then the mined lane columns are filled with paste 9 made of solid waste materials by using a paste conveying pipeline.
After the paste filling working face is mined and filled, the long-wall working face adjacent to the paste filling working face is mined, then holes are drilled in the direction from the paste filling working face transportation gate to the working face goaf, slurry conveying pipelines are paved along the transportation gate and the paste filling working face transportation gate and the holes, and the goaf of the long-wall working face is filled with slurry 10 made of waste solid materials by the slurry conveying pipelines.
In other words, after the paste filling working face is mined, the paste formed by filling solid waste is used for replacing coal pillars to play a supporting role, and after the mining and filling of the paste filling working face are completed, the longwall working face is mined and filled, so that the goaf overlying rock pressure formed by the longwall working face mining can be shared above the paste, stress concentration is avoided, and surface subsidence is reduced.
In addition, the paste conveying pipeline and the slurry conveying pipeline are paved along the conveying main roadway 8 and the paste filling working face conveying gateway, namely the paste conveying pipeline and the slurry conveying pipeline share the roadway, so that the tunneling construction cost and the roadway number are reduced.
In addition, the paste 9 and the paste 10 are prepared from solid waste materials, and the like, so that the source of the filling material is sufficient, the cost of the filling material is low, the waste utilization is realized, and the land resource waste and the environmental damage caused by the accumulation of the surface waste can be solved.
According to the mining and solid waste filling method for the coal mine non-section coal pillar, provided by the embodiment of the application, the paste filling working surface is firstly mined and filled, and then the long-wall working surface is mined, so that coal on the paste filling working surface can be fully collected, the recovery rate of coal resources is improved, the filled paste filling working surface can be utilized to effectively support upper rock, stress concentration is avoided, and surface subsidence is reduced. In addition, the paste conveying pipeline and the slurry conveying pipeline share the roadway, so that the tunneling construction cost and the roadway number can be reduced, and the problems of land resource waste and environmental destruction caused by accumulation of waste solid materials can be solved by adopting solid waste materials for paste and slurry preparation.
Specifically, as shown in fig. 2 to 12, defining a longwall face for initial mining as a first longwall face 1 along a mining direction, defining a plurality of longwall faces as a second longwall face 3, a third longwall face … and an nth longwall face in sequence along the mining direction based on the first longwall face 1, defining a paste filling face adjacent to the first longwall face 1 as a first paste filling face 2, and defining a plurality of paste filling faces as a second paste filling face 4, a third paste filling face … and an nth paste filling face in sequence along the mining direction based on the first paste filling face 2, wherein N is an integer greater than 1, and sequentially mining and filling the first paste filling face 2, the second paste filling face 4, the third paste filling face … and the nth paste filling face along the mining direction;
after each paste filling working surface is mined and filled, the working surface of the long wall adjacent to the paste filling working surface is mined and filled.
It can be understood that the area of the large coal mine is larger, only one longwall working face cannot be utilized to finish mining, sequential mining is required for a plurality of longwall working faces, and in the mining process, before mining for the longwall working faces, the adjacent paste filling working faces are required to be mined and filled, so that the construction safety can be ensured.
Further, to facilitate understanding of a specific mining method, as shown in fig. 1, taking mining and filling of the first paste filling face 2, the first longwall face 1, the second paste filling face 4, and the second longwall face 3 as an example, first, the first paste filling face 2 is dug into and out of the first paste filling face track gate 6 and the first paste filling face transport gate 5.
As shown in fig. 1, the first paste filling face track gate 6 communicates with the track main gate 8 for transporting building materials (such as a supporting frame), the first paste filling face transport gate 5 communicates with the transport main gate 7 for transporting coal, and the first paste transport pipe 11 may be laid along the transport main gate 7 and the first paste filling face transport gate 5, and the first paste transport pipe 11 may fill the first paste filling face 2 after the mining.
Specifically, as shown in fig. 2-4, when the first paste filling working face 2 is mined and filled, the lane column 13 farthest from the transportation large lane 7 in the first paste working face is defined as an initial mining lane column, the initial mining lane column is mined first, after the initial mining lane column is mined, a plurality of lane columns 13 are mined intermittently along the direction close to the transportation large lane 7, namely, after one lane column 13 is mined, a plurality of lane columns 13 can be separated from each other for mining, so that the goaf is excessively large due to the mining of the adjacent lane columns 13, and after the lane columns 13 are mined, the mined lane columns are filled by using paste conveying pipelines, so that each lane column is solid when being mined in an intermittent mining mode, and the construction safety is high.
Further, as shown in fig. 3 to 5, in order to ensure the construction efficiency, the first long-wall working face transportation gate 16 and the cutting hole can be driven while the first paste filling working face 2 is mined and filled, and the first long-wall working face transportation gate 16 and the cutting hole driving are completed when the first paste filling working face 2 is mined and filled. In other words, the first longwall face transportation chute 16 and the cut-in tunneling can be performed simultaneously when the first paste filling face 2 is mined and filled.
Likewise, as shown in fig. 4 and 5, the second paste filling face transportation gate 14 and the second paste filling face rail gate 15 of the second paste filling face 4 may be driven while the first paste filling face 2 is being mined and filled, and the second paste transportation gate 14 and the second paste filling face rail gate 15 may be driven at the end of the mining and filling of the first paste filling face 2, and the second paste transportation gate 18 may be laid along the second paste filling face transportation gate 14 after the driving of the second paste filling face transportation gate 14 is completed.
Further, as shown in fig. 5, during the extraction and filling of the first paste filling face 2, the second longwall face 3 may be cut, the first longwall face 1 may be prepared for installation, and after the extraction and filling of the first paste filling face 2, the second longwall face 3 may be cut, and the first longwall face 1 may be prepared for installation.
Further, as shown in fig. 6 to 8, after the first paste filling face 2 is mined and filled, the first longwall face 1 may be mined, after the first longwall face 1 is mined for a certain distance, holes are drilled in the direction of the goaf of the first longwall face 1 on the first paste filling face 2, the first slurry conveying pipeline 12 is laid along the conveying roadway 7, the first paste filling face conveying gateway 5 and the holes, and the first slurry conveying pipeline 12 may fill the goaf of the first longwall face 1 with the slurry 10. Compared with the traditional mining mode, as the slurry 10 conveying pipelines are distributed along the paste filling working face, namely the filling and the mining keep a certain distance, the mining progress of the long-wall working face is not affected, and the coal mining efficiency is further improved.
Further, as shown in fig. 6 and 7, the second paste filling face 4 is started to be pillar mined and filled simultaneously with the mining of the first longwall face 1.
Further, the second longwall face 3 is ready for installation when the second paste filling face 4 is mined and filled, and the second longwall face 3 is ready for installation when the second paste filling face 4 is mined and filled.
Further, as shown in fig. 9-11, after the second paste filling face 4 is mined and filled, the second longwall face 3 is mined, after the second longwall face 3 is mined for a certain distance, holes are punched in the goaf direction of the second longwall face 3 of the second paste filling face 4, the second paste filling face transportation gate 14 and the second paste 10 transportation pipeline are laid along the transportation roadway 7 and the second paste filling face, and the second paste transportation pipeline 19 can fill the goaf of the second longwall face 3 with the paste 10.
It will be understood that, as shown in fig. 12, after the second longwall face 3 is mined and filled, the first longwall face 1, the first paste filling face 2, the second longwall face 3 and the second paste filling face 4 are all mined and filled, and the subsequent mining of the paste filling face and the longwall face is the same as the above method, and will not be repeated here.
In addition, the slurry in the application can take coal gangue and mine water as raw materials, and the slurry is subjected to the technological processes of crushing, grinding, stirring, pumping, conveying, filling and the like.
The paste can be a novel filling material for coal-based solid waste, and specifically is supported by using three coal-based solid waste materials of coal gangue, fly ash and gasified slag and adopting a salt modification-alkali excitation technical scheme. The paste and the slurry 1 are prepared on the ground, and in particular, the equipment of a gangue crushing, paste preparation and slurry preparation workshop can be established on the ground to manufacture the filling material.
In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present application and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present application.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present application, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.
In the present application, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art according to the specific circumstances.
In the present application, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.
For purposes of this disclosure, the terms "one embodiment," "some embodiments," "example," "a particular example," or "some examples," etc., mean 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, schematic representations of the above terms are not necessarily directed 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. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.
While embodiments of the present application have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the application, and that variations, modifications, alternatives and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the application.
Claims (8)
1. A method for mining a non-section coal pillar and filling solid wastes in a coal mine, wherein a mining area comprises a plurality of long wall working surfaces, and a part between adjacent long wall working surfaces is defined as a paste filling working surface, the method comprising:
digging a large transportation roadway and a large track roadway in a coal mine, and digging a paste filling working face transportation gate communicated with the large transportation roadway and a paste filling working face track gate communicated with the large track roadway along the paste filling working face;
paving paste conveying pipelines along the conveying main roadway and the paste filling working face conveying gateway;
dividing each paste filling working surface into a plurality of lane columns;
adopting a roadway column mining mode to mine a plurality of roadway columns of one paste filling working face, and filling the mined roadway columns with paste made of solid waste materials by using a paste conveying pipeline;
after the paste filling working face is mined and filled, mining the longwall working face adjacent to the paste filling working face, defining a longwall working face for initial mining as a first longwall working face along the mining direction, and then punching in the direction from a paste filling working face transportation gate to a goaf of the first longwall working face;
paving slurry conveying pipelines along the conveying main lane, the paste filling working surface conveying gateway and the punching holes, and filling slurry made of waste solid materials into the goaf of the long-wall working surface by utilizing the slurry conveying pipelines;
defining a plurality of longwall working surfaces as a second longwall working surface, a third longwall working surface, a … and an nth longwall working surface in sequence along a mining direction by taking the first longwall working surface as a reference, defining the paste filling working surface adjacent to the first longwall working surface as a first paste filling working surface, and defining a plurality of paste filling working surfaces as a second paste filling working surface, a third paste filling working surface, a … and an nth paste filling working surface in sequence along the mining direction by taking the first paste filling working surface as a reference, wherein N is an integer greater than 1, and the method further comprises:
sequentially mining and filling the first paste filling working face, the second paste filling working face, the third paste filling working face, … and the Nth paste filling working face along a mining direction;
after each paste filling working surface is mined and filled, mining and filling are carried out on the long wall working surfaces adjacent to each paste filling working surface;
taking the extraction and filling of the first paste filling working face, the first long wall working face, the second paste filling working face and the second long wall working face as examples according to the extraction and filling sequence of the paste filling working face and the long wall working face, the method further comprises:
digging a first paste filling working surface track gate and a first paste filling working surface transport gate along the first paste filling working surface;
paving a first paste conveying pipeline along the conveying main roadway and the first paste filling working face conveying gateway;
defining a lane column farthest from the transportation lane in the first paste filling working surface as an initial mining lane column, wherein the method further comprises:
mining the initial mining roadway column;
after the exploitation of the initial exploitation roadway column is completed, intermittently exploiting a plurality of roadway columns along the direction approaching to the transportation roadway;
and filling the exploited lane columns by using the first paste conveying pipeline.
2. The method for mining and filling solid waste into a coal mine non-section coal pillar according to claim 1, further comprising:
tunneling a first longwall face transportation gate and a cutting hole of the first longwall face while the first paste filling face is mined and filled;
and when the mining and filling of the first paste filling working face are finished, the first long-wall working face transportation gateway and the cutting tunneling are finished.
3. The method for mining and filling solid waste into a coal mine non-section coal pillar according to claim 2, further comprising:
driving a second paste filling working surface transportation gate and a second paste filling working surface track gate of a second paste filling working surface while the first paste filling working surface is mined and filled;
when the exploitation and filling of the first paste filling working face are finished, the second paste filling working face transportation gateway and the second paste filling working face track gateway tunneling are finished;
and paving a second paste conveying pipeline along the second paste filling working surface transportation gateway.
4. The method for mining and filling solid waste into a coal mine non-section coal pillar according to claim 3, further comprising:
in the process of mining and filling the first paste filling working face, tunneling a cutting hole of the second long-wall working face, and performing the work of preparing and installing the first long-wall working face;
after the first paste filling working face is mined and filled, the hole cutting and tunneling of the second long wall working face are completed, and the installation preparation work of the first long wall working face is completed.
5. The method for mining and solid waste packing a coal mine non-section coal pillar according to claim 4, further comprising:
after the first paste filling working face is mined and filled, mining the first longwall working face;
and after the first longwall working surface is mined for a certain distance, punching the first paste filling working surface transportation gate way to the goaf direction of the first longwall working surface, and paving a first paste conveying pipeline along the transportation roadway, the first paste filling working surface transportation gate way and the punching, wherein the first paste conveying pipeline fills paste to the goaf of the first longwall working surface.
6. The method for mining and filling solid waste into a coal mine non-section coal pillar according to claim 5, further comprising:
and (3) simultaneously mining the first longwall face, and beginning to perform roadway column mining and filling on the second paste filling face.
7. The method for mining and solid waste packing a coal mine non-section coal pillar of claim 6, further comprising:
and when the second paste filling working surface is mined and filled, performing the installation preparation work of the second long wall working surface, and when the second paste filling working surface is mined and filled, completing the installation preparation work of the second long wall working surface.
8. The method for mining and filling solid waste into a coal mine non-section coal pillar according to claim 7, further comprising:
mining a plurality of roadway columns of the second paste filling working face in an intermittent mining mode, and after the second paste filling working face is mined and filled, starting mining of the second longwall working face;
and after the second longwall working surface is mined for a certain distance, punching holes in the second paste filling working surface transportation gate way to the goaf direction of the second longwall working surface, and paving a second slurry conveying pipeline along the transportation roadway, the second paste filling working surface transportation gate way and the punching holes, wherein the second slurry conveying pipeline fills slurry to the goaf of the second longwall working surface.
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