保德煤矿底板奥灰水害防治关键技术

保德煤矿属带压开采矿井,煤层底板承受最大水压达到5.3 MPa。为了保证矿井安全带压开采,通过对矿井奥灰含水层特征、突水机理及防治技术进行研究,针对矿井不同水平煤层带压开采所面临的水文地质条件和突水危险性,采用采掘前隐伏导水构造的综合探查与评价和奥陶系峰峰组隔水性能利用2种奥灰水害防治方法,有效保障了矿井近10年的安全带压开采,杜绝了奥灰水害的发生;由此得出隐伏导水构造探查和奥陶系峰峰组利用作为矿井奥灰水害防治关键技术是科学、有效的。

Key Technology of Prevention and Control of Water Disaster of Ordovician Limestone in Baode Coal Mine Floor

Baode Coal Mine is a coal mine mining under pressure, and the maximum water pressure of coal seam floor is 5.3 MPa. In order to ensure safe mining under pressure, the characteristics of Ordovician limestone aquifer, water inrush mechanism and prevention technology are studied. In view of the hydro-geological conditions and water inrush risks of coal seam mining at different levels under pressure, the comprehensive exploration and evaluation of the concealed water conducting structure before mining and the water resistance of Ordovician Fengfeng Formation are used to prevent and control Ordovician lime water hazard,which effectively guarantees the safe mining under pressure for nearly ten years and prevents the occurrence of Ordovician lime water hazard. It is considered that the exploration of concealed water conducting structure and the utilization of Ordovician Fengfeng Formation as the key technology for Ordovician lime water hazard prevention and control are scientific and effective.