淮南新集一矿瓦斯赋存的构造控制作用

Structural Control on Gas Occurrence in Xinji No.1 Coalmine,Huainan

淮南新集一矿位于阜凤逆冲推覆构造的下伏系统,在强烈的近NS向应力挤压作用下,区内构造煤较为发育,导致瓦斯分布的不均一性。在分析矿区构造发育特征的基础上,探讨了构造对构造煤发育和瓦斯赋存的控制作用,结合测井曲线解释结果,分析了构造煤分布规律。结果表明,井田内构造煤总体呈现南厚北薄的变化趋势;以F10断裂为界,瓦斯具有明显的南北分带特征,矿井南部煤层埋藏浅、瓦斯含量低,而北部瓦斯含量和瓦斯压力均较高,虽然构造煤发育程度略低于南部,但由于煤层埋深加大、含气量增高,突出危险性也较大。

The Xinji No.1 coalmine in Huainan is in the underlying system of the Fuyang-Fengtai thrust nappe,since the near NS intensive compression,tectonoclastic coal is rather well developed in this zone,which leads to the inhomogeneous gas distribution.Based on the analysis of mine area structural development features,the paper discussed the structural control on tectonoclastic coal development and gas occurrence in Xinji No.1 coalmine.Combined with logging curve explanation,has analyzed distribution pattern of tectonoclastic coal.The results showed that tectonoclastic coal thickness is generally increasing from north to south,thus south and north zonation of gas distribution is obvious and the fault F10 acts as the boundary.Although the development degree of tectonoclastic coal in the north is slightly lower than that in the south,but because of higher gas content,gas pressure and deeper burial depth can increase the coal and gas outbursts hazard.