Distribution Laws of Abutment Pressure for Deep Fully-mechanized Top-coal Caving Face With Large Mining Height

Based on the geologic and production and technological conditions of 2301 fully-mechanized top-coal caving with large mining height face in Longgu Coal Mine, the paper have comprehensively studied distribution laws of abutment pressure by theoretical analysis, FLAC^3D numerical simulation and in-sit observation. The study draws the working face trend and distribution range and peak value and stress concentration factor of the tendency support pressure, and reveals distribution laws of abutment pressure with the advancing of face. Compared to the numerical simulation and theoretical analysis, the errors of experimental results are small.