摘要
煤层瓦斯赋存受到含煤地层水的影响,为了揭示林西矿水文地质特征及瓦斯赋存规律,为煤矿安全开采提供指导,根据煤矿瓦斯地质资料和水文地质资料,分析水质特征、瓦斯赋存特征及地下水动力场特征。结果表明,林西矿奥灰水质类型为Ca·Na-HCO_(3)型,含煤地层水质类型为(Na+K)-HCO_(3)型,含煤地层水矿化度较高,水动力条件较弱。林西矿的瓦斯赋存特征和地下水运移整体上受开平向斜控制,使得矿区处于瓦斯过渡区和逸散区,瓦斯含量较低,同时,矿井内的褶皱和断层构造对瓦斯赋存也造成不同程度影响,林西矿的地下水流动方向与瓦斯含量流动方向相同,地下水的矿化度和煤层瓦斯含量都随着水流方向而逐渐降低,水动力条件逐渐增强。该研究对林西矿深部煤层安全开采及瓦斯治理有着重要指导意义。
Coal seam gas occurrence was affected by coal-bearing strata water.In order to reveal the hydrogeological characteristics and gas occurrence law of Linxi Mine and provide guidance for coal mine safety mining,according to the coal mine gas geological data and hydrogeological data,the water quality characteristics,gas occurrence characteristics and groundwater dynamic field characteristics were analyzed.The results showed that the water quality type of Ordovician limestone in Linxi Mine was Ca·Na-HCO_(3) type,and the water quality type of coal-bearing strata was(Na+K)-HCO_(3) type.The salinity of coal-bearing strata water was high and the hydrodynamic conditions were weak.The gas occurrence characteristics and groundwater migration of Linxi Mine were generally controlled by Kaiping syncline,which made the mining area in the gas transition zone and the escape zone,and the gas content was low.At the same time,the folds and fault structures in the mine also had different degrees of influence on the gas occurrence.The groundwater flow direction of Linxi Mine was the same as the gas content flow direction.The salinity of groundwater and the gas content of coal seam gradually decreased with the direction of water flow,and the hydrodynamic conditions gradually increased.This study had important guiding significance for the safe mining and gas control of deep coal seams in Linxi Mine.
作者
李新亮
Li Xinliang(Tangshan Kailuan Linxi Mining Industry Co.,Ltd.,Tangshan 063104,China)
出处
《煤炭与化工》
2025年第2期54-59,64,共7页
Coal and Chemical Industry
关键词
瓦斯赋存
水文地质
地下水
关系
gas occurrence
hydrogeology
groundwater
relationship
