Analysis On The Influence Of Rock Creep On Mechanical Behavior Of Segmental Lining Of Deep And Long Shield Mine Incline

In recent years, with the development of economy, the coal mining depth is increasing, which leads to a potential and increasing threat to construction and long-term safety of coal mine roadway. Under high geostress condition, the creep of surrounding rock may become threatening to long-term safety of mine inclines.With the Xinjie coal incline as engineering background, the influence of surrounding rock creep on mechanical property of incline lining is studied. The main research contents are listed as follows:1.The parameters of Burgers creep equation and implict creep equation 6 are fitted refer to experimental creep curves from a similar stratum. A 2-D stratum structure model of coal incline considering the creep of surrounding rock is built. In the numerical model, different creep models, different simulation methods of contact surface between structure and surrounding rock and different simulation methods of segmental joints are comparatively studied, and a more suitable creep modle and more relative reasonable simulation methods are gained.2.Based on the simulation model, the influence of surrounding rock creep on lining mechanical property of shield deep incline under gravitational stress field is researched, and the mechanics and distortion laws of incline lining are gained.3. Based on the simulation model, the influence of surrounding rock creep on lining mechanical property of shield deep incline under different tectonic stress fields is researched, and the mechanics and distortion laws of incline lining are gained.