Research on Gas Migration Output Features Based on Coal Body Structure

MENG Jie; YANG Chengtao; WANG Hongpan; WANG Jinshang; ZHAI Qingwei

Safety in Coal Mines > 2015 > 46(5): 4-7.

MENG Jie, YANG Chengtao, WANG Hongpan, WANG Jinshang, ZHAI Qingwei. Research on Gas Migration Output Features Based on Coal Body Structure[J]. Safety in Coal Mines, 2015, 46(5): 4-7.

Citation:

MENG Jie, YANG Chengtao, WANG Hongpan, WANG Jinshang, ZHAI Qingwei. Research on Gas Migration Output Features Based on Coal Body Structure[J]. Safety in Coal Mines, 2015, 46(5): 4-7.

Citation:

MENG Jie, YANG Chengtao, WANG Hongpan, WANG Jinshang, ZHAI Qingwei. Research on Gas Migration Output Features Based on Coal Body Structure[J]. Safety in Coal Mines, 2015, 46(5): 4-7.

Research on Gas Migration Output Features Based on Coal Body Structure

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Published Date: May 19, 2015

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Abstract

We established flow pattern discrimination method based on GSI by analyzing gas flow pattern discrimination method and analyzed coal gas migration laws of GSI ≥ 45 and GSI <45, the results show that when GSI ≥ 65, bedding / cleats of coal body structure become the controlling factors of gas migration. Two migration modes including diffusion-seepage or seepage occur when starting pressure gradient is over the gas pressure gradient. When GSI = 45 to 65, gas migration laws are similar with the traditional fragmentation coal, it can achieve high-speed linear or non-linear seepage flow (turbulent), internal gas of matrix blocks transport relying on the diffusion. While migration mode for GSI <45 is two poles diffusion.
- coal body structure,
- GSI,
- gas migration,
- transfusion,
- diffusion

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