【摘要】 分析采场突水条件和位置是突水预测的基础。根据采场支撑压力发展规律和底板应力分布特征，进行了突水条件突水位置的研究，底板突水的条件是矿压对底板的破坏使其有效隔水层厚度降为零和水压不小于卸压区的侧向压力。在采场的内外应力场形成之前，突水位置在采空区；内外应力场形成之后，突水位置在煤壁附近更多还原

【Abstract】 A analysis about the conditions of water inrush form mining floor and its site are based of forecasting water inrush.Based on the developing law of supporting pressure and the distributive characteristics of floor stress,this paper analyses the conditions of water inrush from mining floor and its site.The conditions of water inrush are as follows,the floor is broke by mining pressure,with the result that valid thickness of aquifuge is reduced to zero,and water pressure is not less than side pressure in unload area.Before inside and outside stress is formed,the site of water inrush is situated on the waste.After inside and outside stress is formed,that is situated closed to the wall.更多还原