贵州省织金县戴家田井田构造对瓦斯赋存的控制作用

Structure Control on Gas Deposition of Daijiatian Coalfield,Zhijin County of Guizhou Province

为了揭示戴家田井田瓦斯赋存规律及构造对瓦斯赋存的控制作用,基于井田瓦斯地质资料与区域构造特征及其演化,分析了构造及其演化对瓦斯赋存的影响。研究表明：戴家田井田瓦斯赋存严格受构造控制,其构造形态是一个轴向SW向的不对称向斜,北西翼宽缓,倾角9°-34°,发育一组共9条断层,且切割含煤地层,次一级褶曲宽缓且波幅很小;而南东翼陡峭,一般倾角为12°-51°,其受三组断层严重破坏,断层极发育,构造复杂,致使瓦斯赋存条件由轴部到两翼逐渐变差且北西翼好于南东翼。

In order to reveal gas occurrence laws and tectonic in Daijiatian mine on control action of gas occurrence,based on the gas and geological data,regional tectonic characteristic and its evolution,the paper analyzes the control action of geological structure factors such as tectonic evolution,structural types on coalfield gas occurrence.The results showed that the gas occurrence was strictly controlled by the structure in Daijiatian Coalfield,whose structural shape is asymmetric syncline of axial SW direction,north-west wing is extensive wide and gently,the dip 9° ~ 34°,a group of 9 faults,which cutting the coal bearing strata,The secondary fold is extensive wide and gently wave amplitude is very small,south-east wing is steep,the dip 12° ~ 51°,the fault is severely damaged by the three groups,the fault is very developed,and the structure is complex,the gas deposition features is gradually becomes poor from the axis to the wings and the north-west Wing is better than the south-east wing.