淮南矿区井田小构造对煤与瓦斯突出的控制作用

井田小构造要素是控制煤与瓦斯突出的主要地质因素,它综合影响其他因素,会造成不同破坏程度的煤体结构.对淮南矿区煤与瓦斯突出点构造资料的统计表明,突出点受构造控制的占近64%,而煤、岩巷中的构造控制突出占近72%,突出点由小断层引起煤层产状及煤体结构强烈揉皱的占100%.淮南矿区煤与瓦斯突出点的构造组合形式分断层构造、断层与褶皱叠加和褶皱构造三类,其中断层组合又分地堑型、阶梯型、断层交汇型、挤压构造型和顺层断层型五种.小构造发育是造成煤与瓦斯突出平面分区性和空间分带性的主要原因,构造煤发育程度是造成煤与瓦斯突出发生的直接原因;必须进一步加强小构造对构造煤发育控制范围的研究,提高煤与瓦斯突出预测预报地质构造指标的可靠性.

Small-scale structures controlling coal and gas outburst in Huainan Coal Field

The small?scale structure occurred in coal mines is one of the main three geological factors controlling coal and gas outbursts,which influences other factors and destroys the original coal?seam texture.In Huainan Coal Field,it has been demonstrated that the structure?controlled coal and gas outbursts count for 64%,the outbursts occurred in rock tunnels and coal tunnels dominate as much as 72% of the total disasters.All of the out?bursting coal beds display severe deformation of occurrence and texture.The coal and gas associated structure styles include fault,fold and juxtaposition of the former two,which cause the zonation of outburst distribution spatially.The occurrence of well?developed structure?destroyed coal bed is the direct key element causing coal and gas outburst.Therefore,it must be further studied that how and how much the small?scale structure destroy the original coal bed texture in order to increase the reliability of the geological factor in coal and gas outburst prediction.