Abstract: According to the hydrogeological conditions of Huashengrong coal mine,the key index of evaluating water-inrush risk of floor is extracted.Various factors of the coal floor water-inrush disaster in engineering practice are analyzed.Through coalfield drilling and exposing 15 drilling datum from the Austrian limestone,the aquifuge thickness and water pressure value of floor confined water are analyzed and identified.The paper analyzes the evolution of water-inrush coefficient formula,calculates the coefficient of water-inrush,determines that mining division with water pressure in Huashengrong mine 3^# coal seam partition is in a relatively safe area.The paper further predicts mine inflow and verifies the mine drainability,which provides data base for rechecking and verification of pressuring coefficient during mining in Huashengrong coal mine 3^# coal seam working face,and has important guiding significance for formulating and improving mining with water pressure technology measures.