为厘清平顶山矿区首山一矿戊组煤高瓦斯压力成因,运用瓦斯赋存地质构造控制理论,根据平顶山矿区地质构造特征、矿井实测瓦斯参数、矿区地应力场特征等,分析了矿区瓦斯地质特征、区域地质构造形成与演化对矿区煤层瓦斯赋存与排放的控制作用、戊组煤成煤作用、变质作用及生烃过程,在此基础上重点研究了首山一矿井田地质构造及地层特征、水动力条件对戊组煤层瓦斯压力及含量的影响.认为平顶山矿区东区为高地应力、高瓦斯压力赋存区;位于东区的首山一矿井田的构造特征和由巨厚砂质泥岩、泥岩组成的戊组煤层顶底板岩石条件,弱的水动力条件,以及高水平挤压应力等形成独特的三维封闭型构造组合,是造成首山一矿戊组煤层高瓦斯压力的主要原因.%To find out high gas pressure genesis in the coal group Wu, Shoushan No.1 coalmine, Pingdingshan mining area, using gas hosting geological structural control theory, according to structural features in Pingdingshan mining area, measured gas parameters, ground stress field features analyzed gas geological features, control actions from regional tectonic formation and evolution on gas host-ing and discharging, coalification of coal group Wu, metamorphism and hydrocarbon generation process. On this basis emphatically studied impacts from Shoushan No.1 coalmine minefield geological structure and stratigraphic features, hydrodynamic condition on coal group Wu gas pressure and content. The study has considered that the eastern part of Pingdingshan mining area has high ground stress and high gas pressure. While this part the Shoushan No.1 coalmine situated is a distinctive 3 dimensionally closed structural as-semblage, the structural features, very thick sandy mudstone, mudstone constituted coal group Wu roof and floor have weak hydrody-namic condition and high horizontal compressive stress, those are the main reasons to generate high gas pressure in the coal group.
展开▼
