临涣煤矿7煤层瓦斯赋存主控因素分析

Analysis of Main Controlling Factors on Methane Occurrence in No.7 Coal Seam in Linhuan Coal Mine

为了减少瓦斯对煤层开采的影响,在7煤层矿井基本资料、瓦斯涌出量、瓦斯参数测试统计的基础上,对该煤层褶曲、断裂、煤层埋深、煤体变质程度进行分析考察。结果表明,7煤层瓦斯赋存影响的主要因素是断裂构造、煤层埋深,正断层附近瓦斯含量和同标高煤层瓦斯含量相比明显偏低,瓦斯含量整体上随煤层埋深增大而升高。褶曲、煤体变质程度等局部区域地质构造对瓦斯赋存的影响具有不均衡性,造成了东部区域瓦斯含量和西部相比偏高。

To reduce the influence of methane on coal mining,the geological structures such as the seam fold,fault,coal depth and coal metamorphism are analyzed through the coal mine basic information,methane emission,methane parameters on the basis of the test.The results show that the fault structure and coal seam depth are the main factors about the methane occurrence in No.7 coal seam,the methane content near downthrow faults are significantly lower than other area with the same level,the methane content generally rises with increasing coal depth.There is unbalanced influence exit between fold,coal metamorphism and other local regional geological structure,causing the methane content in eastern regions is higher compared with the western.