善福煤矿底板奥灰水承压开采安全性评价

Safety evaluation of floor Ordovician limestone water mining with pressure in Shanfu Mine

善福煤矿计划开采15-3煤层,与下伏奥陶系石灰岩含水层之间隔水层厚度较小,为预防奥灰水给矿井安全生产带来的影响,通过对矿井水文地质条件分析、隔水层岩石力学特征计算、突水系数法评价等手段,对矿井15-3号煤层奥灰水突水危险性进行评价。经过计算:矿井隔水层厚度及力学性能指标能够承受现有奥灰水水头压力,突水系数法评价矿井承压开采区为突水威胁区,突水可能性较小,无导水构造存在情况下不会发生奥灰水突水事故,无需采取底板注浆加固、疏水降压、建立强排水系统等措施,对奥灰水进行预防、治理工作。

Shanfu Mine planed to mine No.15-3 coal seam,with small water resistance layer thickness to underlying Ordovician limestone aquifer,in order to prevent the effect of Ordovician limestone water to safe mining,No.15-3 coal seam water burst danger was summarized by analyzing mine hydrogeological conditions,calculation of rock mechanical characteristics of water-proof layer,evaluation of water inrush coefficient method,Thickness and mechanical property index of mine waterproof layer could enable to support the water source pressure of limestone water,water bursting coefficient method proved the mining with pressure area as the water burst threaten area,with small odds of water burst,without water burst measures without water conductive structures.