安阳矿区瓦斯赋存规律的地质因素分析

Geologic Factorial Analysis of Gas Hosting Pattern in Anyang Mining Area

安阳矿区多为高瓦斯和煤与突出瓦斯矿井。通过钻孔和矿井瓦斯资料分析,认为区内二1煤层瓦斯含量高,最高可达41.72m3/t。区内瓦斯赋存规律明显,具有南北分带、北低南高的分布特征,其展布规律主要受地质构造、煤层埋深、围岩、煤厚、变质程度、水文地质条件等因素的影响,而地质构造中的地垒、地堑造成的断块抬升、下降,断层的多期构造应力作用及其对煤层的剪切作用,褶曲等构造因素是造成矿区瓦斯分布不均衡的主要原因。

In the Anyang mining area are mostly high gaseous and coal,gas outburst hazardous coalmines.Through borehole and mine gas data analyses have considered that the II1 coal seam＇s gas content can be 41.72m3/t as high.Gas hosting pattern in the area has obvious characteristics of zoning from north to south,low to high distribution.Its distribution pattern is mainly impacted by geological structure,coal seam buried depth,surrounding rock,coal thickness,metamorphism degree and hydrogeological conditions.While the structural factors including fault block uplift and downthrow caused by horsts and grabens,multiphase faulting stress actions and their shearing on coal seams,as well as folding are main reasons of unbalanced gas distribution in the mining area.