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新疆中-低阶煤瓦斯含量较低,前期勘探开发和研究中都未给予足够的重视,随着近年来煤层开采深度的加深,瓦斯事故造成巨大的人员伤亡及经济损失。中-低阶煤中瓦斯赋存受多因素的控制,逆冲断层面的封闭性与构造煤共同导致瓦斯在近断层处聚集,且随着深度的增加,瓦斯含量的浓度随之增加;顶底板泥岩、砂质泥岩与地下水对瓦斯有效封堵,此外进一步的研究发现多区块火烧产生的气体对瓦斯产生驱替,致密烧变岩对瓦斯造成封堵;上述因素共同造成阜康五宫、大黄山、西沟、新世纪矿区瓦斯富集形成火烧-水力封堵-断层型煤层气藏,这为煤矿的安全生产和瓦斯的勘探开发提供了依据。
The gas content of medium- and low-rank coal in Xinjiang is relatively low. However, no sufficient attention has been paid to exploration and development in the previous years. With the deepening of coal mining in recent years, gas accidents have caused huge casualties and economic losses. The gas occurrence in medium-low rank coal is controlled by many factors. The sealing of thrust surface and tectonic coal together lead to the accumulation of gas near the fault, and the concentration of gas content increases with the increase of depth. Bottom mudstone, sandy mudstone and groundwater effectively block the gas. In addition, further studies have found that the gas produced by multi-block fire displaces the gas and the dense burned rock blocks the gas. All these factors together result in the " , And the gas enrichment in Datangshan, Xigou and New Century mines forms a fire-hydraulic plugging-fault coalbed methane reservoir, which provides the basis for safe production and gas exploration and development in coal mines.