平煤五矿瓦斯赋存规律研究

Occurrence Rule of Gas in Pingmei No.5 Coal Mine

为掌握矿井煤层瓦斯赋存规律,结合平煤五矿煤层赋存地质条件、煤层开采情况及井下实测瓦斯压力及瓦斯含量等,研究埋深对主采的二_(1)煤层及二_(2)煤层瓦斯压力及瓦斯含量影响,并给出瓦斯压力及瓦斯含量变化梯度;分析地质构造、埋深、顶底板岩性及煤厚等对瓦斯赋存的影响。研究发现:二_(1)(己_(16-17))、二_(2)(己_(15))煤层瓦斯赋存的主要影响因素为埋深,同时构造可能导致局部煤厚出现明显变化,进而引起瓦斯赋存的不均衡性。研究成果可在一定程度上为平煤五矿瓦斯治理工作的开展提供指导。

In order to master the gas occurrence law of coal seams in the mine,combined with the geological conditions of coal seam occurrence,coal seam mining situation and measured gas pressure and gas content in Pingmei No.5 Coal Mine,the influence of burial depth on the gas pressure and gas content of 2_(1) coal seam and 2_(2) coal seam in main mining was studied,and the change gradient of gas pressure and gas content was given;the influence of geological structure,buried depth,lithology of roof and floor and coal thickness on gas occurrence was analyzed.It was found that the main influencing factors of gas occurrence in 21(Ji16-17)and 22(Ji15)coal seams were burial depth,and the structure may cause obvious changes in local coal thickness,which led to uneven gas occurrence.The research results can provide guidance for the gas control work of Pingmei No.5 Coal Mine to a certain extent.