Coal mine air return roadway arrangement structure

Abstract

The utility model discloses a coal mine air return roadway arrangement structure which comprises a concentrated air return main roadway, an inner concentrated air return joint roadway and a boundary air return cross-cut, the concentrated air return main roadway is provided with a rail cross-cut opening, the direction is 119 degrees, the roadway slope is + 3 per thousand, the roadway section is 12.32 m, and the roadway is supported in an anchor net spraying mode. The inner block concentrated air return combined roadway is arranged from a concentrated air return combined roadway opening, the direction is 251 degrees 44 '29', the gradient is-4 degrees, the roadway section of the inner block concentrated air return combined roadway is 12.32 m, the roadway supporting mode is an anchor net spraying mode, the roadway is arranged from a concentrated air return main roadway opening, the direction is 237 degrees 22 '44', the roadway gradient is + 3 per thousand, the roadway section is 12.32 m, and the roadway supporting mode is an anchor net spraying mode. The supporting mode of the roadway of the boundary air return rock cross-cut is an anchor net spraying mode. The utility model solves the problem that the next mining area mining is tense in replacement, and the mining area mining layout is more reasonable by arranging the concentrated air return main roadway and the boundary air return cross-cut.

Description

Technical Field

[0001] The utility model relates to the technical field of coal mine return air tunnels, in particular to a coal mine return air tunnel arrangement structure. Background Art

[0002] Mining in the mining area will lead to the problem of mining succession tension, and affected by large fault coal seams, the rationality of mining is even more important. Summary of the invention

[0003] The technical problem to be solved by the utility model is to provide a coal mine return air tunnel arrangement structure to solve the technical problems existing in the prior art.

[0004] The technical solution adopted by the utility model is: a return air lane layout structure of a coal mine, including a centralized return air lane, a centralized return air lane in a block, and a boundary return air stone gate. The centralized return air lane is arranged from the track stone gate opening and arranged to the east, with an orientation of 119° and a lane slope of +3‰. The lane section of the centralized return air lane is 12.32m². The support method of the lane adopts the anchor net spraying method. The centralized return air lane in the block is arranged from the centralized return air lane opening and arranged to the east. Layout, orientation 251°44'29", slope -4°, the tunnel section of the inner block centralized return air tunnel is 12.32m², the tunnel support method adopts anchor net spraying, the tunnel of the boundary return air stone gate is set from the centralized return air tunnel opening and arranged to the east, orientation 237°22'44", tunnel slope +3‰, the tunnel section of the boundary return air stone gate is 12.32m², the tunnel support method of the boundary return air stone gate is anchor net spraying.

[0005] Furthermore, the above-mentioned centralized return air main tunnel, inner block centralized return air connecting tunnel, and boundary return air stone gate are located to the east of the mining area track stone gate.

[0006] Beneficial effects of the utility model: compared with the prior art, the utility model can solve the problem of tight succession of mining in mining areas, and make the mining layout of mining areas more reasonable by setting up centralized return air lanes and boundary return air stone gates. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] Figure 1 It is a schematic diagram of the layout structure of the return air tunnel in a coal mine;

[0008] Figure 2 It is a schematic diagram of the top view of the return air tunnel layout in a coal mine. DETAILED DESCRIPTION

[0009] The present invention will be further described below in conjunction with specific embodiments.

[0010] Example 1: Figure 1-2As shown, a return air lane layout structure of a coal mine includes a centralized return air lane 1, a centralized return air lane 2 in a block, and a boundary return air stone gate 3. The centralized return air lane 1 is set to open from the track stone gate 4, with an orientation of 119° and a lane slope of +3‰. The lane section of the centralized return air lane 1 is 12.32m². The lane support method adopts the anchor net spraying method. The centralized return air lane 2 in the block is set to open from the centralized return air lane, with an orientation of 251°44'29" and a slope of -4°. The tunnel section of the return air connecting tunnel 2 is 12.32m², and the tunnel support method adopts the anchor net spraying method. The tunnel of the boundary return air stone gate 3 is set to open from the centralized return air tunnel 1, with an orientation of 237°22'44", and a tunnel slope of +3‰. The tunnel section of the boundary return air stone gate 3 is 12.32m², and the tunnel support method of the boundary return air stone gate 3 is anchor net spraying. The centralized return air tunnel 1, the inner block centralized return air connecting tunnel 2, and the boundary return air stone gate 3 are located on the east side of the track stone gate of the mining area.

[0011] The utility model is designed for a specific mining area, from the 130 track stone gate opening to a centralized return air lane, after construction to the F15 fault, turn to the construction of the 130 boundary return air stone gate, in the early stage, for 16 # , 17 # , 18 # The coal seam is arranged to serve the mining face. In the later stage, it will serve the coal mining in the block east of the F15 fault in the mining area 3. The recoverable reserves of the service are about 5.154 million tons, so as to solve the problem of the tight mining and replacement in the mining area 3 in the next step. By designing the boundary stone gate, the path of the coal company in mining and replacement is explored. To the east of the F15 fault (fall of 30m) in the mining area 3, it has not been mined due to the influence of the F15 fault. There are about 11 mining faces in the block section, and the recoverable coal seams are 3 # , 4 # , 9 # , 12 # , 15 # , 16 # , 17 # , 18 # 、27-1 # 、27-2 # , 32 # The No. 1 coal seam has a recoverable reserve of approximately 5.154 million tons. At the same time, through the design and construction of 130 centralized return air tunnels and 130 boundary return air stone gates, the mining layout of the third mining area has become more reasonable.

[0012] The 130 centralized return air main tunnel is excavated eastward with a strike direction of 119° and a slope of +3‰. The tunnel is excavated in all rock layers. The 130 block centralized return air joint tunnel is an all-rock excavation tunnel. The 130 boundary return air stone gate is a stone gate through-layer excavation tunnel. The excavation exposes the 18, 17, 16, 15, 12, 9, 6-2, 4, and 3# coal seams. In the early stage, excavation is first carried out to the 16# coal seam, and the 130 centralized return air main tunnel and the 130 boundary return air stone gate are used to construct the 131602 transport lane (reverse excavation), 131702 transport lane (reverse excavation), and 131802 transport lane (reverse excavation) tunnel projects, so as to shorten the layout time of the coal mining face. In the later stage, it will be reused as the 15# coal seam. # , 12 # , 9 # 、6-2 # , 4 # , 3 # Return air system in coal seam blocks.

[0013] The actual application design of this layout structure is in the Longtan coal-bearing strata of the Upper Permian System. The exposed lithology consists of fine sandstone, siltstone, muddy siltstone, and silty mudstone coal seams. The stratum dip is 119°, ∠31°-33°, and the vertical burial depth of the working face is 230m-324m.

[0014] The above description is only a specific implementation method of the present utility model, but the protection scope of the present utility model is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the present utility model, which should be included in the protection scope of the present utility model. Therefore, the protection scope of the present utility model should be based on the protection scope of the claims.

Claims

1. A coal mine return air tunnel layout structure, characterized in that: It includes centralized return air main lane, centralized return air connecting lane in inner block and boundary return air stone gate. The centralized return air main lane is set from the opening of track stone gate and arranged to the east, with orientation of 119° and lane slope of +3‰. The lane section of centralized return air main lane is 12.32m², and the lane support method adopts anchor net spraying. The centralized return air connecting lane in inner block is set from the opening of centralized return air connecting lane and arranged to the east, with orientation of 251°44'29" and slope of -4°. The lane section of centralized return air connecting lane in inner block is 12.32m², and the lane support method adopts anchor net spraying. The lane of boundary return air stone gate is set from the opening of centralized return air main lane and arranged to the east, with orientation of 237°22'44" and lane slope of +3‰. The lane section of boundary return air stone gate is 12.32m², and the lane support method adopts anchor net spraying.

2. A coal mine return air tunnel layout structure according to claim 1, characterized in that: The working faces of the centralized return air main tunnel, the inner centralized return air connecting tunnel, and the boundary return air stone gate are located to the east of the mine track stone gate.

Images