阳泉矿区保安煤矿15~#煤层瓦斯地质规律研究

Research of gas geological laws on #15 coal seam of Bao'an Coal Mine,Yangquan mining area

通过整理矿井地质勘探和开采测试揭露的瓦斯地质资料,利用瓦斯地质研究方法揭示矿井现开采15#煤层瓦斯地质规律。结果表明,15#煤层瓦斯含量总体随埋深增加而减小。究其原因,K2、K3和K4石灰岩裂隙岩溶含水层是15#煤层直接充水含水层,在钻孔3-5及保-1处15#煤层陷落柱发育,由于陷落柱可能存在导水现象,使得含水层与煤层具有水力联系,在地下水运移过程中,煤层瓦斯也发生运移,造成煤层瓦斯含量降低。

Through collection of gas geological datum got from mine geological exploration and tryout mining,the gas geological research method is used to bring to light the gas geological laws of mining #15 coal seam.The results indicate that,gas content in #15 coal seam is getting lower along with the depth of coal seam underground.The reason is that,water-bearing strata of K2、K3、K4 limestone fissured karst is the water filling resource directly to #15 coal seam.#15 coal seam downthrow column develops in 3-5 drilling hole and Bao-1 drilling hole.Due to the possible water flowing in downthrow columns,water connection exists between water-bearing strata and coal seams.With the water moving underground,coal seam＇s gas is also moving,hence makes the gas content in coal seams reduced.