Mechanism analysis and grouting reinforcement technology of coal wall spalling in boundary coal face

Taking the 1223 working face of the Xiandewang coal mine as the engineering background, in view of the large angle mining during the irregular corner coal face, there is a serious problem of coal and rock fragmentation and coal wall spalling when mining.This paper analyzes its influencing factors of coal wall slaving in high angle mining face, puts forward the method of grouting reinforcement with high polymer reinforcement material, expounds the principle of grouting reinforcement of the polymer reinforcement material, and designs the grouting reinforcement scheme and applies it.The practice of recovery shows that after grouting and reinforcement with polymer reinforcement material, the working face and the roof are effectively controlled, and the working face can be recovered normally.