Xiang Fu Heavy Gypsum Mine Stope Ore Optimization Of Structural Parameters

Our country has large reserves of gypsum, which is widely distributed, and has more general cream, less high-quality cream. There are about 500 gypsum mines, the average yield is about 50,000 tons. Gypsum is mainly used in building products, cement retarder, soil conditioner, fertilizer, arts, crafts and other industries, which has made great contribution to the development of the national economy. Over the past decade, gypsum is the fastest growing non-metallic ores and minerals of the most stable development momentum.70% of the gypsum mine in China is mining underground, and essentially all mine is used to stay top of the plaster room and pillar mining method. Structural parameters of the stope is very important to the gypsum mines. The reasonable structural parameters not only can ensure the safety of roof, does not occur large-scale ground pressure activities, including gob collapse and surface subsidence, but also can improve the recovery rate of ore maximum, to increase economic benefits of the mines.In this paper, we studying the optimization of stope structure parameters to the inclined heavy gypsum mine by Xiang fu actual mining situation in Hunan Linli County.Firstly, we obtain the performance parameters of rock mechanics of the Xiang fu gypsum mine by the compression test, tensile test, and shear test in the laboratory.Then we can made the mechanical parameters of rock into a rock mechanics parameters by Hoek-Brown strength criterion.And by using the plastic mechanics, structural mechanics, material mechanics, engineering mechanics and engineering experience formula, we can solve the stope limit span, the thickness of retaining top, pillar size, pillar spacing, the thickness of isolation plate of heavy mine by the stratified mining.Finally, we using the MIDAS finite element software to simulation the ore mining with the different Structural parameters between single mining and stratified mining of the inclined heavy ore. And we know the technology of stratified mining is appropriate to the inclined heavy ore.