采面陷落柱及断层发育特征对瓦斯赋存的影响

Influence of Mining Face Subsided Column and Fault Development Characteristics on Gas Occurrence

下霍煤矿开采煤田陷落柱及伴生断层发育,给采面正常回采带来明显影响。为了提高煤炭开采安全保证能力,对陷落柱及伴生断层构造分布特征以及对煤层瓦斯赋存影响进行分析研讨,主要成果为:陷落柱周边伴生断层发育受区域地质构造控制,在褶曲发育区伴生断层发育且断层走向多与煤层走向呈较大夹角;陷落柱周边伴生断层落差一般在5 m以内;1306工作面内X6陷落柱及伴生断层对煤层瓦斯有一定的富集作用,越靠近陷落柱煤层瓦斯含量越高,预测1306工作面附近发育的其他陷落柱也有一定的瓦斯富集作用。

In order to cope with the impact of the development of subsided pillars and associated faults on the normal mining of Xiahuo Colliery,and improve the safety assurance ability of coal mining,this paper analyzes and discusses the structural distribution characteristics of subsided pillars and associated faults and their effects on the gas occurrence of coal seam.The main results are:the development of associated faults around the subsided column is controlled by the regional geological structure,and the associated faults develop in the fold development area and the fault strikes are often at a large angle with the coal seam strike;the associated fault drop around the collapse column is generally within 5 m;X6 subsided column and associated faults in 1306 working face have a certain enrichment effect on coal seam gas.The closer the coal seam to the subsided column,the higher the gas content.It is predicted that other subsidence columns developing near the 1306 working face will also have a certain degree of gas enrichment.