焦作矿区冯营矿二_1煤瓦斯赋存的主控因素研究

Study on control factors in gas occurrence of No. Ⅱ_1 coal seam in Fengying coalmine of Jiaozuo mine area

基于定性分析与定量研究相结合,探讨了焦作矿区冯营矿的井田构造地质条件、水文地质条件和围岩岩性,以及煤层厚度、埋深和顶底板岩性等因素对瓦斯赋存的影响。通过数理统计的方法,获得了上覆基岩厚度、煤厚与瓦斯含量的回归方程,并对回归方程进行了显著性检验。研究结果表明,水文地质条件对矿井瓦斯总体分布具有控制作用,而地质构造、煤厚、上覆基岩厚度和顶底板岩性是冯营井田瓦斯含量的局部性差异的主控因素。

Based on qualitative analysis and quantitative research, the {actors affecting gas occurrence, which included geological structures, hydrological geology, burial depth and thickness of coal seams, lithology of roof and floor rocks,had been discussed. By using statistical methods, the regression equations of relationship among thickness of coal seams,thickness of overlying bedrock and gas content were gained and the significance of the regression equations were tested. The results show the hydrogeological condition is the main factor on the regional distribution characteristics of gas oecuerence, and the other factors,including geological structure,thickness of coal seams and overlying bedrock,and lithology of roof and floor rocks, have greater influence on local distribution of coal seam gas in study area.