五矿锅底山断层区域己_(16-17)煤层瓦斯赋存规律分析

Gas Occurrence Law Analysis for J_(16-17) Coal Seam in Fault Zone of Guodishan No.5 Mine

运用瓦斯地质理论和方法,依据锅底山断层形成机理及其发育规律,结合断层区域内煤层厚度、同生和次生构造以及构造煤的分布特征,将断层区域己16-17煤层划分为2个地质单元,锅底山上盘和锅底山下盘。依据断层区域内己16-17煤层地勘瓦斯含量和实测瓦斯含量数据,分析2个地质单元的瓦斯赋存特征,即相同标高下锅底山断层上盘煤层瓦斯含量较下盘高。研究得出地质构造、煤层埋深和构造煤分布是矿井己16-17煤层瓦斯赋存的主要控制因素,即煤层瓦斯含量整体上随煤层埋深的增加而增加,但由于受锅底山断层构造活动影响,瓦斯含量分布又具有一定的差异性。

With the gas geological theory and method and base on the development law and formation mechanism of the Guodishan faults, combined with the thickness of seam, secondary structure and the distribution of tectonic coal characteristics, J16-17 seam in Guodishan fault zone was divided into two geological units. The base on the gas content of J16-17 seam exploration and the measured gas content data in fault zone, the gas distribution features of the units were analyzed. The same standard under the fault footwall coal seam gas content is high. Conclusion is obtained that the major influencing factors are geological structure, burial depth and the distribution of tectonic coal. The methane content generally rises with increasing coal depth, but due to fault activities, gas content distribution has some differences.