重庆松藻矿区打通一矿M_8煤层瓦斯赋存地质规律

Investigation of coal seam M_8 on geological regularity of gas occurrence in Datong mine of Songzao mining area,Chongqing

以重庆松藻矿区打通一矿为研究区,基于瓦斯地质理论,探讨了地质构造、煤厚、埋深、有效埋深以及顶底板岩性等地质因素对主采煤层M8煤层中瓦斯赋存的影响规律.通过数理统计的方法构建了各因素与瓦斯含量的回归方程,并对其进行了显著性检验.研究结果表明,煤厚、埋深等是影响打通一矿M8煤层瓦斯含量分布的主控因素,褶皱构造对瓦斯局部富集具有重要影响,而顶底板区域内岩性比较稳定,有利于瓦斯的保存,但不是引起含气性变化的主要因素.

Based on theory of gas geology,the influence of geological factors on gas occurrence in coal seam M8 of Datong mine is discussed,and these influencing factors include the geology structure and thickness of coal seams,effective burial depth,lithology of roof and floor rocks,etc.By mathematical statistics,the regression equations on these factors and gas content were established and a significance test on the equations was also carried out.The results show that seam thickness and burial depth are the main factors on the gas content distribution,and fold structure has an important influence on the local variation of gas content.The lithology of the roof and floor is relatively stable,and it is a positive effect to gas occurrence,but not the main controlling factor on the change of gas content in Datong coalmine.