Similar simulation experimental investigation on the stability of the stope roof of gently inclined medium thick phosphate rock under the ming of cemented backfilling of waste rock

Based on the gently inclined medium thick phosphate rock of the deep part of the east mining section of +2150 level of Jinning-Six mine of Yunnan phosphate Co., Ltd , the similar simulation model experiment of the stability of stope roof under cemented backfilling mining of waste rock was carried out by the mine pressure plane stress modeling experimental frame of college of resource and environmental sciences. Based on the experimental results, the stress changing law of the above roof of stope roof after the filling of stope along the strike direction of phosphate were investigated. Then the gently inclined medium thick phosphate rock of the deep part of the east mining section of Jinning-Six mine of Yunnan phosphate Co., Ltd could efficiently recover, and the surface in mining areas could also be protected.