Technology of Fully Mechanized Top Coal Caving Mining Face Passing Through Crossing Point Under Strong Mine Pressure

In view of the problems such as roof management, over-limit of harmful gas and spontaneous combustion of coal seam during the period of working face passing through crossing point, taking 11052 working face passing through crossing point of Shanzhai Coal Mine as the research object, through the optimization of the working face and the secondary reinforcing support of the crossing point, the advanced pressure relief in cross-point and the design of fire preventing and extinguishing, we can ensure the safety of crossing point. According to the mining results of working face, the underground pressure behaves as large static pressure and small dynamic pressure during the mining of the lower layer working face. Through the implementation of various technical schemes, the safety crossing point of the working face is ensured.