Abstract: By using 6.2meter full-seam mining technology in SiHemine,working face with large height in the end of mining stage(less than 150meters)will prone to happen slide and roof falling.In order to solve the technical problem,the cement grouting reinforement prevention and control technology were adopted on the basis of detailed analysis of rock structure.Taking the construction technology of combination of 6mshallow-hole plugging grouting and 12mdeep-hole high pressure grouting,we achieved smooth progress and safety in production of working face.