黑龙洞泉岩溶地下水系统煤层底板突水危险性评价

Heilongdong Springs Area Karst Groundwater System Coal Floor Water Bursting Hazard Assessment

黑龙洞泉岩溶地下水系统位于冀中煤炭基地的南端,峰峰矿区则位于该岩溶水系统的东部,是典型的岩溶大水矿床,伴随煤矿上组煤的开采殆尽,下组煤的开采正在展开,但遭受到其底部中奥陶统岩溶水的高压威胁,发生了多次突水事故。通过对黑龙洞泉岩溶地下水系统地质、水文地质条件的详细分析,从煤层隔水层底板水压抗压强度及隔水能力,断层、陷落柱发育程度及其阻、导水性等矿井突水影响因素进行系统分析,采用《煤矿防治水细则》的突水系数法,将研究区划分为煤层底板奥灰突水危险性相对较小区、危险性相对中等区及危险性相对较大区。相关结论对今后该区煤炭资源的开采及煤矿防治水工作具有一定的指导意义。

The Heilongdong springs area karst groundwater system is situated in the south of central Hebei coal base.The Fengfeng mining area is just situated in the eastern part of karst groundwater system,typical karst water-rich coalmines.With upper group coal exploited out,lower group coal mining is ongoing,but has suffered underlying middle Ordovician karst water high pressure threat,multiple water bursting have happened.The paper through detailed analysis of karst groundwater system geological and hydrogeological conditions proceeded with coal floor aquifuge water pressure,compressive strength and water resisting ability,fault and subsided column development degree and its water resistance and conduction properties carried out systematic analysis.Using water bursting coefficient method from“Coalmine Water Control Detailed Rules and Regulations”has partitioned the study area into coal floor Ordovician limestone water bursting hazard relatively small area,relatively medium area and relatively large area.The study has certain guiding significance in coal resources exploitation and coalmine water control works henceforth.