带压开采煤层底板突水危险性评价及防治措施

Risk Assessment and Prevention Measures of Water Inrush from Floor of Coal Seam under Pressure Mining

针对经坊矿井田煤层带压开采底板受多含水层影响,运用理论分析、工程实践等手段,分析底板突水的影响因素,通过计算底板突水系数来评价煤层底板突水的危险性,得到3号煤层为相对安全区。针对3号煤层防治水工作,且井田内陷落柱、断层等地质构造发育的情况,提出了留设防水煤柱、减小工作面长度、防探结合的底板突水防治措施,有效地防止了突水事故的发生。

According to the influence of multi aquifer on the floor of coal seam pressure mining in Jingfang mine field,the influencing factors of floor water inrush are analyzed by using theoretical analysis and engineering practice.The risk of water inrush from the floor is evaluated by calculating the water inrush coefficient of the floor,and the coal seam 3 is a relatively safe area.In view of the water prevention and control work of No.3 coal seam,and the development of geological structures such as falling column and fault in the well field,the prevention measures of water inrush of the floor with waterproof coal pillars,reducing the length of working face and combination of anti exploration are put forward,which can effectively prevent the occurrence of water inrush accidents.