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湖南利民矿井地质构造具有明显的区域差异性,应力分区易于确定。由于主、次、附加构造应力场的联合与复合作用,导致边界条件各异。3# 煤层顶底板的围岩性质不同,地质构造发育就不一样,使其构造应力分布不均。导致发育于3# 煤层顶底板的断褶构造具有平面上的分区性和剖面上的不协调性。据煤与瓦斯突出的频率和强度,厘定出强突出区、次强突出区、未突出区、弱突出区四种突出区域,分别对应于构造应力区的过度挤压区、挤压区、引张区和过渡区。地质构造的差异性是利民矿区煤与瓦斯突出强度和频率的主控因素。
The geological structure of Hunan Limin mine has obvious regional differences, and the stress zones are easy to determine. Due to the combined effect of primary, secondary and additional tectonic stress fields, the boundary conditions are different. The roof and floor of No.3 coal seam have different rock types and different development of geological structure, resulting in uneven distribution of tectonic stress. The result shows that the fractured structure developed on the roof and floor of 3 # coal seam has the planar zonality and the cross-section incongruity. According to the frequency and intensity of coal and gas outburst, the four prominent areas of strong and secondary strong and unmarked areas and weakly outburst areas are determined, which correspond to over-crush zone and crush zone of tectonic stress zone respectively Zhang area and transition area. The difference of geological structure is the main controlling factor of coal and gas outburst intensity and frequency in Limin Mining Area.