贵州红砖煤矿瓦斯赋存规律分析

Analysis of gas occurrence law in Hongzhuan Coal Mine of Guizhou Province

瓦斯安全一直是煤矿安全的重点,研究煤层瓦斯赋存规律可以为预防煤矿事故提供指导依据。为了查明红砖煤矿煤层瓦斯赋存规律,依据该井田地质资料和煤质资料,运用线性回归分析方法,分析研究了井田可采煤层瓦斯含量与煤层煤质、地质构造、围岩岩性、水文地质条件、煤层埋深及厚度间关系,研究结果表明:煤层煤质、煤层厚度影响瓦斯初始值;围岩岩性及埋深影响储存条件;水文地质条件提供运移动力;断层提供运移通道;褶皱提供运移压力;得出埋深、水文地质条件、地质构造原因造成瓦斯在断层以及谷里向斜轴部区域富集的结论,使得井田总体表现出埋深-水文-构造的条件耦合特点瓦斯赋存规律。

Gas control has always been the focus of coal mine safety,and the research of coal seam gas occurrence law can provide guidance for the prevention of coal mine accident.In order to find out coal seam gas occurrence law in Hongzhuan Coal Mine,based on the geological data and coal quality data of the mine,the linear regression analysis method was used to study the relationship between the minable coal seam gas content with coal quality,geological structure,surrounding rock lithology,hydrogeological conditions,coal seam buried depth and coal seam thickness.The results show that the coal quality and thickness affect the initial gas value;the lithology and buried depth of surrounding rock affect the storage conditions;hydrogeological conditions provide migration power;faults provide migration channels;folds provide migration pressure;buried depth,hydrogeological conditions and geological structure are the reasons for the gas enrichment in the fault and syncline axis area.The gas occurrence law of mine field shows the coupling characteristics of buried depth,hydrology and structure.