Method for arranging same-direction inner staggered roadways in extremely close coal seam mining

A roadway layout and extremely close-distance technology, applied in tunnels, ground mining, mining equipment, etc., can solve problems such as leftovers in goafs, concentrated pressure, and obvious mining pressure, so as to improve resource recovery rate and increase economic benefits of enterprises Effect

Pending Publication Date: 2021-09-24
SCI & TECH RES OF SHANXICOAL TRANSPORTATION & SALES GROUP
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Problems solved by technology

[0003] During the mining of short-distance coal seams, due to the influence of comprehensive factors such as roadway layout, coal pillar setting, and the distance between the upper and lower mining intervals, when the lower coal seam is mined, pressure concentration and mine pressure will appear obvious in the mining of the lower coal seam, and even occur. Large-scale roof fall accidents; due to the complete collapse of the upper and lower layers of rock, the accumulated water and gas formed during the mining of the upper coal seam will gush out, causing water damage and gas accidents; due to the communication of the goaf, the formation of air leakage is easy to form a goaf Spontaneous combustion of leftover coal

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  • Method for arranging same-direction inner staggered roadways in extremely close coal seam mining
  • Method for arranging same-direction inner staggered roadways in extremely close coal seam mining
  • Method for arranging same-direction inner staggered roadways in extremely close coal seam mining

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Embodiment Construction

[0105] The present invention analyzes and studies the effect of different working face lengths on floor damage, the influence range of coal pillars with different widths on the floor, and three different roadway layout schemes through theoretical calculation and numerical simulation comprehensive methods, and makes choices for roadway layout parameters. It has laid a solid foundation for roadway support and cost saving.

[0106] Destructive analysis of post-mining floor in upper coal seam

[0107] In the descending mining sequence of short-distance coal seams, the coal pillars left behind after the mining of the upper coal seam will have a destructive effect on its floor strata, which in turn will cause the roof of the lower coal seam to be affected by the mining of the upper coal seam. When the roadway is rationally arranged, it is necessary to first analyze the damage depth of the left coal pillar to the floor in the goaf of the upper coal seam and the stress distribution ch...

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Abstract

The invention discloses a method for arranging same-direction inner staggered roadways in extremely close coal seam mining. The method analyzes and studies the damage influence of different working face lengths on a bottom plate, the diffusion influence range of coal pillars with different widths on the bottom plate and three different roadway arrangement schemes through a theoretical calculation and numerical simulation comprehensive method, and roadway arrangement parameters are selected. A solid foundation is laid for roadway supporting and cost saving.

Description

technical field [0001] The invention relates to a coal seam mining method, in particular to a method for arranging the same direction and internally staggered roadways for extremely close-distance coal seam mining. Background technique [0002] According to the "Shanxi Coal Transportation and Sales Group Taishan Long'an Coal Industry Co., Ltd. Geological Instructions for the Fourth Mining Area of ​​No. 11 Coal Seam" and the actual disclosure on site, 11 上 Coal seam, the maximum coal seam thickness is 1.9m, the minimum coal seam thickness is 1.38m, and the average thickness is 1.66m; 11 下 Coal seam, the maximum coal seam thickness is 5.09m, the minimum coal seam thickness is 3.70m, and the average thickness is 4.46m. 11 上 with 11 下 The maximum interlayer spacing of the coal seam is 3.46m, the minimum interlayer spacing is 2.01m, and the average interlayer spacing is 2.74m, which belongs to the extremely close-distance mining coal seam. [0003] During the mining of short-...

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Application Information

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IPC IPC(8): E21C41/18E21D9/14G06F30/20
CPCE21C41/18E21D9/14G06F30/20
Inventor 张安慎田王健李溪枝孙国强王利军党其刘兆宇冯刚张亮卫伟
Owner SCI & TECH RES OF SHANXICOAL TRANSPORTATION & SALES GROUP
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