煤层瓦斯地质规律及异常分析

Analysis on laws of gas geology of coal seam and exception

针对煤层瓦斯地质规律对矿井开展采掘设计及安全生产带来的影响,采用钻屑解吸法和实验室分析相结合的方式,实测了岳圣山煤矿15号煤层瓦斯含量及瓦斯气体成分。实测数据显示:15号煤层气体组分中,氮气(N2)含量最高(41.07%~62.28%),甲烷(CH4)含量次之(37.72%~58.93%),二氧化碳(CO2)含量最低,可以初步判断岳圣山煤矿15号煤层大部分处于瓦斯风化带中的氮气—甲烷带。综合分析得出:15号煤层处于氮气—甲烷带是由煤层成煤地质史、煤层出露地表、较浅的埋藏深度及煤炭固有的水文特征等原因所决定的,对矿井安全生产及预测深部瓦斯地质规律有指导意义。

In al lusion to law of gas geology affects the basic of extraction design and product ion for coal mine,using cutt ings desorption method and experimental testing to find out the gas content and components in No. 15 coal seam of Yuesheng mountain. The data dis-played that nitrogen content was the highest,reaching 41.07 -62 .28 %, methane content re ached 37. 72 -58. 93 % , and carbon dioxide content was almost zero. It can be initial determined that the No. 15 coal seam of Yuesheng mountain Coal Mine was mostly in weathered zone of the gas in the methane with nitrogen. The geology history,outcrops and light of the coal seam,and hydro-geological condition was the most important reason for the low gas constant in the weathered zone. The study would be significant for the production and predic-tion of law of gas geology for the deeper coal seam.