Abstract: According to the analysis results of the destruction situation of the upper middle roadway of Red Sea mining area, fractures,faults and the complex changes of approach of dynamic and static stress field are the important factors of the middle of roadway roof caving. So, the 180 m middle development roadway is numerical simulated by adopting the RFPA2D software,the roadway destruction mode that is maybe appeared under the conditions of static stress field. To be specific,the stress is concentrated on intersection lines of roadway roof, firstly, the middle of roadway is destructed, then, the fractures extend to the deep, shaft station roof is separated from the upper stable rock formations eventually, then it is caved. Fractures are appeared in the ore drift roof, so, the ore drift roof is unsafe under the dynamic stress field. According to the numerical simulation results, the anchor-plate retaining method is used to deal with shaft station, the single anchor length, every other row of anchorage support method is adopted to deal with ore drift outside dyke, therefore, the stability of development roadway is guaranteed.

Key words: RFPA2D, Roadway support, Destruction mode of roof