Advance Coal Mining Method without Coal Pillar in Thin Coal Seam

A coal mining method and a technology without coal pillars, which are applied in the directions of ground mining, mining equipment, earthwork drilling, 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: 2020-08-07
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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  • Advance Coal Mining Method without Coal Pillar in Thin Coal Seam
  • Advance Coal Mining Method without Coal Pillar in Thin Coal Seam
  • Advance Coal Mining Method without Coal Pillar in Thin Coal Seam

Examples

Experimental program
Comparison scheme
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 length of the diffuse ventilation is not greater than 5m, the working area of ​​the auxiliary roadway ahead of the mining is not greater...

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 non-pillar-advancing coal mining method, which includes: determining the mining area, arranging roadways, arranging working areas, mining and filling, and complete mining. The advanced coal mining method without coal pillars in the thin coal seam provided by the present invention has the following beneficial effects: the coal mining system is simple in layout, two working faces can be mined at the same time at one time, and the production efficiency is high; the working face adopts the advanced mining process, and three roadways Serving two working faces at the same time, the roadway excavation rate is low, the coal output speed is fast, and it is beneficial to relieve the tension of mining continuity; the solid waste storage space formed by the skip mining method has a regular shape, and both sides are solid structures, which are easy to form regular Filling body; the goaf is used as a solid waste storage space to realize the effective use of underground waste space, reduce the mine pressure, reduce the difficulty of retaining roadways, and prevent surface subsidence; no coal pillars are left in the working face, which improves the recovery rate of coal resources .

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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Patent Type & Authority Patents(China)
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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