Deformation Characteristics of Roadway Surrounding Rock of Large Mining Height Working Face During Initial Mining Period

Aiming at the characteristics of strong strata behaviors of large mining height working face during initial mining period, taking 1282（3） working face in a coal mine of Anhui province as the research object, numerical simulation software FLAC^3D is used to simulate deformation characteristics of two roadways surrounding rock of large mining height working face during primary mining period. Monitoring stations in transportation lane and return air tunnel are set in 1282（3） working face to monitor the deformation amount and deformation rate of roadway in initial mining period. The results show that the influence area of advanced supporting pressure is about 60 m in front of working face during initial mining period, the deformation amount and deformation rate of haulage roadway is greater than that of air return roadway.