贵州烂泥田煤矿瓦斯地质规律及构造控制分析

Gas geology and structural control analysis of Lannitian Mine in Guizhou

本文以烂泥田煤矿勘查测试资料为基础,结合构造逐级控制理论,分析了区内瓦斯地质规律以及构造对煤层瓦斯赋存的控制作用。分析结果表明,区内煤层瓦斯含量整体上呈随埋深增加含量升高的趋势;区域上的构造演化过程奠定了六盘水地区煤层瓦斯赋存的复杂性,形成了区域上瓦斯含量高的背景;盘关向斜与杨梅山-小达村断层共同控制了区带上煤层瓦斯的赋存;矿井范围的断层主导了矿井瓦斯赋存和区域瓦斯赋存的差异性,形成了井田瓦斯含量北西和南东部低,中部至北东部瓦斯含量高的特点,局部小型断层对瓦斯赋存呈点状控制,在局部复杂了瓦斯分布特征。

Based on the exploration and test data of the Lutiantian Mine, combined with the structure-level control theory,the gas geological law in the area and the control effect of the structure on the occurrence of coal seam gas were analyzed.The analysis results showed that the gas content of coal seam in the area increased with the increase of burial depth. The tectonic evolution process in the area laid the complexity of coal seam gas occurrence in Liupanshui area and formed a background with high gas content in the area. The Panguan syncline and the Yangmeishan-Xiaoda village fault jointly controlled the occurrence of coalbed methane in the zone, the faults in the mining area dominated the difference between mine gas occurrence and regional gas occurrence, forming a high gas content in the northwest and low in the southeast, and the gas content in the middle to the north was high. The local small faults had a point-like control on the occurrence of gas,which complicated the gas distribution characteristics in the local.