保德煤矿8号煤瓦斯赋存规律及主控因素研究

为查明保德煤矿8号煤瓦斯赋存规律和主控因素，从煤层特征和煤层含气性特征入手，讨论了矿区构造、煤层埋深、煤层厚度、煤质以及矿区水文地质条件等多种因素对瓦斯赋存的影响，查明了保德煤矿8号煤瓦斯赋存的主控因素。结果表明，保德煤矿8号煤层瓦斯含量在纵向上随埋深的增加而增高，在平面上富集受煤厚和矿区地下水水动力条件控制；此外，矿区局部发育的小构造也对8号煤瓦斯含量有一定影响，水分、灰分、挥发分等煤质主要参数对8号瓦斯含量影响较小。通过掌握煤层瓦斯赋存规律和其主控因素可以为抽采钻孔合理布置提供理论依据，对煤矿的安全生产具有重要意义。

Study on gas occurrence law and main control factors of No.8 coal seam in Baode Coal Mine

In order to find out the gas occurrence law and main control factors of No.8 coal seam in Baode Coal Mine,starting from the characteristics of coal seams and gas bearing characteristics of coal seams,this paper discussed the influence of many factors such as mining area structure,coal seam burial depth,coal seam thickness,coal quality and hydrogeological conditions of the mining area on gas occurrence,and found out the main control factors of gas occurrence of No.8 coal seam in Baode Coal Mine.The results showed that the gas content in No.8 coal seam of Baode Coal Mine increased with the increase of burial depth in the longitudinal direction,and the enrichment in the plane was controlled by the thickness of coal and the hydrodynamic conditions of groundwater in the mining area;In addition,the small structures developed locally in the mining area also had a certain impact on the gas content of No.8 coal,and the main parameters of coal quality such as water,ash and volatile matter had a small impact on the gas content of No.8 coal.By mastering the law of coal seam gas occurrence and its main control factors,we could provide a theoretical basis for the rational layout of drainage boreholes,which was of great significance to the safety production of coal mines.