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Research on Gas Occurrence and Emission of Sanjiazi Coal Mine

Author: WangXiaoLei
Tutor: ZhangHongWei
School: Liaoning Technical University
Course: Mining engineering
Keywords: gas geology gas emission gas content gas pressure coal and gas outburst
CLC: TD712
Type: Master's thesis
Year: 2009
Downloads: 79
Quote: 1
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Abstract


Methane gas is always the key of coal mine safety, with the mine’s depth and intensity enhancing, there is more and more methane flowing out, coal and gas outburst happens somewhere in the coal mines which have serious influence on coal mine safety.The paper based on the actual conditions of SanJiazi coal mine, analyzes the factors which affect the contents of coal mine methane gas, confirms gas quantity, gas pressure, gas through coefficient, attenuation coefficient by laboratory tests and field tests of the gas parameters, uses the Least-Squares regression analysis studying gas distribution orderliness in deep of coal, draws gas flood map, exerts paleoplate tectonic theory and region geologic structure evolvement theory, analyzes the geo-structure of the mine, combines with the former relative gas data and gas flow-volume distribution map, studies the gas emission law in the deep of the mine, makes the prediction of coal and gas outburst and divides the dangerous area of coal and gas outburst.Research indicates that convex structures are not good for preservation of gas but concave structures are just the opposite. The deposits of the transitional nature from marine to continental facies, mudstone-sand shale based wall rock, NE shear reverse faults based tectonic setting and igneous rock decides the high gas content of SanJiazi coal mine. The paper points out that the geo-structure is the background of coal and gas outburst in SanJiazi coal mine. Gas pressure of coal group six distributes unevenly, gas pressure of area west one and area east one differ a lot. -700m level area west two -610 crosscut -660 crosscut, -700m level area west one -650 crosscut, -700m level area east one -700 crosscut, -700m level area east two -700 crosscut are dangerous areas of regional prediction.

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CLC: > Industrial Technology > Mining Engineering > Mine safety and labor protection > Mine atmosphere > Mine Gas
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