Thin coal seam coal-pillar-free advancing type coal mining method

A coal mining method and technology without coal pillars, applied in ground mining, mining equipment, earth drilling and mining, etc., can solve the problems of difficult mining and low efficiency, achieve simple layout, high production efficiency, and improve the recovery rate of coal resources Effect

Active Publication Date: 2020-05-12
BEIJING ZHONGKUANG INNOVATION ALLIANCE ENERGY & ENVIRONMENTAL SCI RES INST
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In order to solve the technical problems of difficult mining and low efficiency, a coal pillar-free advancing coal mining method with low tunneling rate, high production efficiency, fast coal discharge speed and reasonable use of gobs is provided.

Method used

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  • Thin coal seam coal-pillar-free advancing type coal mining method
  • Thin coal seam coal-pillar-free advancing type coal mining method
  • Thin coal seam coal-pillar-free advancing type coal mining method

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Experimental program
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Effect test

Embodiment 1

[0075] The number of mining layers in this embodiment is 1;

[0076] According to the ventilation system of the mining area and the layout of the mining area, select the location of the first mining face.

[0077] Arrange the roadheader to advance the main roadway at the opening of the main machine roadway of the coal mining machine; arrange the roadheader to advance the two auxiliary roadways at the opening of the solid waste slurry transportation roadway. figure 1 The leftmost end of , and with the mining of working area 3, the main roadway and auxiliary roadway are gradually excavated.

[0078] Further, local ventilators are used to ventilate the roadway during excavation.

[0079] Further, the protective coal pillar of the main roadway in the mining area is 25m, and the width of the working area is set to 3m. In view of the fact that the diffusion ventilation length is not greater than 5m, the auxiliary roadway is not more than 5m ahead of the working area being mined;

...

Embodiment 2

[0108] The inclination angle of the coal seam is 8~10°, the average thickness of the first coal layer (the upper mining layer) is 1.1m, the average thickness of the second coal layer (the lower mining layer) is 0.8m, and the argillaceous sandstone with an average thickness of 1.2m is between the two coal layers;

[0109] The difference with Embodiment 1 is that the coal mine area is divided into two mining layers, such as Figure 7 As shown, and the mining layer of the lower layer is preferentially mined;

[0110] When mining the lower mining layer, it is necessary to fill all odd-numbered and even-numbered working areas with non-polluting solid waste; the schematic diagram of the completion of the mining of the lower mining layer is shown Figure 8 shown.

[0111] After the mining of the lower mining layer is completed, repair the main roadway and auxiliary roadway of the lower mining layer:

[0112] Withdraw the equipment in the main roadway and auxiliary roadway of the lo...

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Abstract

The invention provides a thin coal seam coal pillar-free advancing type coal mining method. The method comprises the following steps: determining a mining area, arranging a roadway, arranging a working interval, mining and filling, and completely mining. The thin coal seam coal-pillar-free advancing type coal mining method has the following beneficial effects that a coal mining system is simple inarrangement, two working faces can be mined at the same time at a time, and the production efficiency is high; the working faces adopt a forward mining process, and three roadways simultaneously serve two working faces, so that the roadway driving rate is low, the coal discharging speed is high, and the mining connection tension is favorably relieved; a jump mining mode is adopted, the formed solid waste storage space is regular in shape, the two sides of the solid waste storage space are of solid structures, and regular filling bodies are easily formed; the goaf is used as a solid waste storage space, so that the underground waste space is effectively utilized, the mine pressure is weakened, the roadway retaining difficulty is reduced, and the surface subsidence is prevented; no coal pillar is left on the working face, and the coal resource recovery rate is increased.

Description

technical field [0001] The invention relates to the technical field of coal mining, in particular to a coal pillar-free forward coal mining method in a thin coal seam. Background technique [0002] Coal resources are my country's strategic energy, and strategic energy refers to energy that accounts for more than 50% of primary consumption. Usually thin coal seam refers to the coal seam whose thickness is less than 1.3m, and ultra-thin coal seam refers to the coal seam whose thickness is less than 0.8m. Its efficient mining has always been a hot and difficult issue in the field of coal mining. At present, the traditional 121 construction method is mainly used in the layout of thin and extremely thin coal seam roadways, that is, to mine one working face, two roadways need to be excavated in advance, and one coal pillar is left as a support after mining, which has poor safety conditions and serious waste of resources . Contents of the invention [0003] In order to solve th...

Claims

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Application Information

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IPC IPC(8): E21C41/18E21F15/00
CPCE21C41/18E21F15/00
Inventor 何满潮杨晓杰黄瑞峰夏洪满
Owner BEIJING ZHONGKUANG INNOVATION ALLIANCE ENERGY & ENVIRONMENTAL SCI RES INST
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