太原西山矿区煤层瓦斯赋存特征

Gas Occurrence Characteristics of Taiyuan Xishan Coal Mining Area

选择太原西山矿区山西组2#煤和太原组8#煤为研究对象,对矿区瓦斯赋存特征进行了研究。研究表明,主要煤层对瓦斯的吸附能力强,瓦斯压力、瓦斯含量普遍较高,同一矿区太原组8#煤的瓦斯含量高于山西组2#煤,并随埋深增大而增高。煤层瓦斯含量与煤层的煤化程度,包括煤层埋深、围岩条件及透气性等煤层赋存条件、地质构造、水文地质条件密切相关。

Selects the No. 2 coal seam of Shanxi formation and No. 8 coal seam of Taiyuan formation in Xianshan coal mining area of Taiyuan as the research object, the characteristics of gas occurrence of the mining area is studied. The study shows that the main coal seam of high gas adsorption capacity, and gas pressure, gas content is relatively high, On the same mining area the gas content of 8th coal seam of Taiyuan formation was higher than that of 2nd coal seam of Shanxi formation, with depth increased, the gas content was increased. Gas contents of coal seam has close relationship with coal seam occurrence and other conditions, geological structure, hydro-geological conditions, such as degree of coalification, depth, surrounding conditions and permeability of the coal seam.