Creep Stability Analysis of Surrounding Rock of Abandoned Mine Roadway
Aiming at the problems such as low utilization efficiency and poor safety of underground space due to large deformation caused by long-term creep during the reuse process of abandoned mine road-way,numerical simulation software FLAC3D was used to analyze the creep characteristics and stress varia-tion rules of surrounding rock of deep roadway under three support schemes.The research shows that the Burgers-Mohr creep model can scientifically simulate the creep characteristics of roadway during the service period of underground space utilization.Among the three support schemes,the bolt + prestressed anchor ca-ble + steel arch support has the worst effect and is only suitable for short-term support.Lining and support-ing effect is second;Bolt + prestressed anchor cable + lining support has the most obvious effect.Rigid and flexible support can effectively control the deformation of roadway surrounding rock,and the creep force of surrounding rock can be controlled in a small range,resulting in stable creep of roadway.The research re-sults can provide a theoretical basis for the safe utilization of underground space in abandoned mines.
NETL
NSTL
万方数据
维普
