钱家营矿煤与瓦斯突出关键因素分析

Analysis of key factors of coal and gas outburst in Qianjiaying mine

针对钱家营矿5煤层、7煤层、9煤层、12煤层主要可采煤层赋存特征,通过对瓦斯压力、瓦斯含量、煤厚变异、地质构造、煤的结构特性和顶底板岩性的对比分析,以及运用模糊综合评价法求其评分,初步确定了地质构造因素具备突出关键因素的可能。结合瓦斯地质和钻探资料,地质构造因素能够很好地解释各煤层可能突出区域的强弱关系,符合煤与瓦斯突出是地应力、瓦斯、煤体结构共同作用的结果。依据断层埋深、断层长度、断层条数、密集程度和褶皱关系将地质构造因素划分成四个区域,运用层次分析法取其权重,量化了地质构造因素。综合结果表明,地质构造因素是钱家营矿煤与瓦斯突出的关键因素。

According to the occurrence characteristics of the 5,7,9 and 12 main recoverable coal seams in Qianjiaying mine. Through the analysis of gas pressure, gas content, variation of coal thickness in geological structural, structural characteristics of coal, lithology of roof and floor, applying the fuzzy comprehensive evaluation method to calculate its weight. Preliminary determination of geological structural factor may be the key factor. Uniting gas geology and drilling data,the strong and weak relation of each coal seam can be explained by the geological structure factor. The coincidence of coal and gas outburst is the result of the crustal stress, gas and coal structure. According to the fault depth, fault length, fault bar number,density and fold relation, the geological structural factors are divided into four areas. Analytic hierarchy proeess（AHP） is used to obtain its weight and quantification of geological structural factor. The comprehensive results show that the geological structure is the key factor of coal and gas outburst.