Numerical Simulation and Determination of Bolt Parameters of Roadways

The track tunnel at the level of +600 m in Shizuishan No.1 coal mine has a complex stress condition.Therefore,reasonable supporting form and support parameters were worthy of studying.Bolt parameters of the track tunnel were simulated by using the finite software ANSYS in order to provide a theoretical basis for designing support parameters.In this paper,the prevailing method of regarding stress-strain as analysis object at present was spurned.However,the zone of plastic failure around the roadway was analyzed through different mapped paths of model and the safety factor level around the roadway was partitioned.The numerical simulation and in-situ monitor data show that the more severely broken areas are at the bottom and corner of roadways.Good support effect can be achieved after applying the result of numerical simulation to in-situ construction.