Abstract: Taken the 15018 working face of Zhaogu No.1 mine as the engineering background, coal rib spalling deep mechanism of 12011 working face was studied and analyzed by theoretical analysis and numerical simulation. Shaft theory model analysis was done on coal rib spalling form under abutment pressure effect, changing situations of coal rib spalling of different mining height and depth were obtained, and the coal rib spalling would increase with the increasing of mining height and depth of working face. Inducement mechanism of large cutting height coal rib spalling was analyzed through simulation of vertical displacement, horizontal displacement of coal and coal plastic zone of different mining height and depth, which had a certain guiding significance for safety production and support design of large cutting height working face which coal rib spalling serious.

Key words: Large cutting height working face, Coal rib spalling, Numerical simulation, Rib spalling mechanism