吕家坨矿瓦斯地质控制因素分析

Analysis of Gas Geological Control Factors for Lyujiatuo Mine

基于矿井采掘煤样分析、实验测试数据、实际生产资料,对吕家坨矿瓦斯地质控制因素进行了相关分析,结果表明:吕家坨矿7、8、9、12_(-1)各煤层储存物性特征各有不同,12_(-1)煤层表现出了更好的瓦斯吸附性;研究区赋有较多大型张性断裂构造,且岩浆岩发育,致使煤层顶底板裂隙发育,煤层瓦斯整体含量较低;煤层顶底板含泥率较高、厚度发生急剧变化及经过小型张性断层发育区为瓦斯涌出量出现明显异常现象的直接因素。

Based on the analysis of coal samples,experimental test data,actual production data,we analyze the gas geological controlling factors of Lyujiatuo Mine. The results prove that the 7,8,9,12_（-1） coal seam of Lyujiatuo Mine shows different characteristics of storage; 12_（-1） coal seam presents better gas adsorption. The study area has many large tensile fractures,and the magmatic rocks are very developed,which causes the crack development of coal seam roof and floor; the overall content of the coal seam gas is lower. The direct factors of obvious anomaly gas emission are the high mud content and sharply change thickness of coal seam roof-floor,and passing through the small tensile fault zone.