Advance Roof Grouting Technology in Pinggou Coal Mine

In order to effectively control problems of roof caving and large trickling in the process of roadway tunneling, Pinggou coal mine took the superfine sulphoaluminate cement as grouting material. Roof loose and large trickling area is grouted to reinforce and block. Practice shows that the application of advance roof grouting technology can better cement grouting material, waste rock and coal in loose area into one part, which reduces the occurrence probability of roof caving and centralized water trickling.