地质构造对煤层瓦斯赋存与分布的控制作用

Control Action of Geological Structure on Coal Seam Gas Occurrence and Distribution

为了研究地质构造对煤层瓦斯赋存以及分布的影响,为中国瓦斯事业做贡献,通过矿山统计分析与地质构造单元划分的方式,研究了瓦斯地质特点,并对其含量与成分进行了研究。结果表明,煤层瓦斯含量随着煤层埋深的增加而逐渐增大,不同的构造形态导致矿区局部瓦斯出现异常情况,断层附近的瓦斯涌出量峰值出现的位置、瓦斯涌出的范围分别是断层落差的35倍、60倍的距离,构造煤距离断层越近,粒径小于1mm的煤粒在煤体中所占的比例越大。

In order to study the influence of geological structure on the occurrence and distribution of coal seam gas and make contributions to the gas industry in China, this paper studied the geological characteristics of gas through statistical analysis of mines and division of geological structure units, and studied its content and composition. The results show that the gas content of coal seams gradually increases with the increase of coal seam burial depth, the shapes of different structures lead to local gas anomalies in the mining area. The location of the peak value of gas emission near the fault and the range of gas emission are 35and 60 times the distance of the fault drop, respectively. The closer the structural coal is to the fault, the larger the proportion of coal particles with a particle size of less than 1 mm in the coal body.