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Preliminary Discussion of Gas Geology Law in Xinjing Mine

Author: WangJianGuo
Tutor: TangYouYi
School: Henan Polytechnic University
Course: Geological Engineering
Keywords: Gas geology Influence factor Outburst mechanism Outburst of coal and gas Risk prediction
CLC: TD712
Type: Master's thesis
Year: 2009
Downloads: 73
Quote: 1
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Abstract


Gas geology is a newly developed frontier subject, studying the natural law of occurrence and effusion of coal seam gas, outburst of coal and gas. Gas geology, which closely combines the study of gas with the study of geology and utilizes the basic theory and methods of geology, studies occurrence conditon, migration and distribution law of coal seam gas and gas dynamic phenomena. The main study includes: the formation of gas;geological conditions of gas occurrence; geological conditions of coal and gas outburst; coal and gas outburst prediction. The 7303 working face of No.3 coal seam in Lubei mining area, Xingjing mine occurs the first coal and gas outburst on Nov. 11 2004 normal coal-cutting, the outburst volume is 70t, the gas volume is 11560m3 and one death is caused.Up to Nov. 2008, there are 158 outburst. The maximum intensity takes place on Jan. 30 2007, on the North Second Cut tunnel heading face of No.3 coal seam in Lubei mining area, the outburst volume is 90t, the gas volume is 10,000m3.The mine shafts in No.3 coal seam frequently take place the outburst of coal and gas and ejection of gas,seriously inflencing the production safety of mine shafts and the development of economic benefit. In order to guarantee safety and production of coal mine, this paper preliminarily discusses the gas geology law in Xinjing mine, and analyses the geological factors,including occurrence of gas, geology structure of coal and gas outburst, the varition of coal seam thickness, coalbed structure, burying depth and mine pressure and so on, and the outburst mechanism of coal and gas. The study shows that geology conditons have significant control function of coalbed gas content and partitioning and zoning of gas outburst. And according to the real conditions of research area and requirement of program, the outburst of coal and gas of No.3 coalbed in Xinjing mine is predicted.

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