Mechanism and prevention and control key technology of hysteretic water inrush from fault of coal mining face in deep underground mine

The hysteretic water inrush from a deep rock fault in a coal mine would have the concealed, hysteretic, high difficult prevention and control features, in C ombination with the hysteretic water inrush control engineering occurred from the fault during the mining process of No. 13301 coal mining face in No.3 Mining Block of Wanglou Mine. Based on the analysis on the hydrogeologic and water source survey, the paper had a study on the hysteretic water inrush mechanism of the fault under the mining role. A low cost and effective cement base grouting material was researched and developed and could ensure the engineering control requirements of the mi ne water inrush. In comparison with the conventional cement material, the new cement base grouting material could save about 60% of the material cost. The new cem ent base grouting material could be applied to the hysteretic water inrush control engineering occurred from the fault. In combination with the water inrush variation of t he coal mining face and the key evaluation technology of the grouting effect during the grouting control process, the water flow channels occurred by the site cracking d evelopment were intercepted and the hydraulic channels were sealed. Thus the water inrush volume was effectively controlled and the expected water sealing effect was reached.