大平煤矿特大型煤与瓦斯突出瓦斯地质分析

以瓦斯地质理论为基础，运用区域构造演化理论，分析了矿区、矿井瓦斯地质规律，调研了大平煤矿“10·20”矿难发生特大型煤与瓦斯突出的地质原因，即新密矿区中三叠世受构造强烈挤压作用，晚侏罗世至早白垩世、晚白垩世至第三纪受构造拉张和重力滑动作用.大平煤矿垂深450 m以浅，以低瓦斯为主；深部瓦斯地质条件复杂，存在着煤与瓦斯突出危险的分区、分带特征，并受地质构造的控制.“10·20”煤与瓦斯突出发生在构造复合部位，应力集中、构造煤发育，是岩石掘进工作面遇一逆断层而引起的.

Investigation into coal-gas outburst occurred in Daping Coalmine, by using theories of gas-geology

Based on gas-geology and theories of regional tectonic evolution, the laws of gas geology were studied. And geological reason of the “10·20” mining calamity was surveyed, which is a oversize coal-gas outburst occurring in Daping mining. The results show that Early Triassic epoch, intense tectonic extrusion appeared, the late Jurassic to the early Cretaceous epoch and the late Cretaceous to the Tertiary epoch tectonic pullapart and gravity slide occurred in Xinmi minings, gas grade is low in superficial part above 450 m underground, gas-geological condition is complex in the deep, coal-gas-outburst proneness is of zoning and banding and controlled by geological structure in Daping mining. “10·20” mining calamity is a accident of coal and gas outburst occurring at complex tectonic place, where tectonic stress is concentrated, there is deformed coal, and tunneling face meets a abnormal fault.