Different roof behaviour under different upper mining boundary condition in datonb

摘要

Understanding roof behavior and immediate roof failure patterns of longwall face is a prerequisite for establishing correct roof control theory and aplying effective roof control measures. Roof behavior and immediate roof failure pattern have a close relationship with upper mining boundary conditions of longwall face. According to actual situation of Datong Mining Area, upper mining boundary conditions of longwall face have been classified into 5 types in this paper.