疏水降压技术体系在潘西煤矿奥灰水害防治中的应用

Application of dewatering and depressurizing technology system in preventing water disaster from the Ordovician limestone in Panxi Coal Mine

潘西煤矿19#煤层奥灰含水层为半封闭型、有限补给边界的富水性不均一的含水层,具备疏水降压的大环境;矿井涌水量与奥灰水位降深数据表明两者之间具有正相关性,获得了定量关系表达式。建立了一套完善的矿井疏水降压技术体系,包括探查边界导水性和井下工作面富水性、健全矿井水文观测系统、井下疏放水、加强矿压及突水征兆观测、增强排水能力等。

The Ordovician limestone aquifer in No. 19 coal seam of Panxi Coal Mine had the semi-closed and boundary which had heterogeneous water abundance and limited supply, it had the environment of dewatering and depressurizing. There was positive correlation between mine inflow and drawdown of Ordovician limestone, and the quantitative expression was made out. A integrated dewatering and depressurizing technology system was built, including searching the transmissibility of boundary and water abundance of working face, improving the mine hydrologi- cal observing and drain and blowdown system, reinforcing the observation of rock pressure and water inrush omen, and enhancing the drainability.