Change rule of physical and mechanical property of rock mass in Shendong mine

Through the research on the relationship between physical and mechanics parameters of rocks and sedimentary period and burial depth in three typical high face mining in Shendong mining area, the following conclusions can be obtained: 1) Physical and mechanics parameters of congeneric rocks at the same depth is closely connected with the sedimentary period. There are still radical differences in the physical and mechanics parameters of the rocks among the different mine, even they are with the same lithology at the same depth and in the same mine areas. The physical and mechanics parameters of rocks at earlier sedimentary period is greater than the ones at later sedimentary period. 2) The physical and mechanics parameters of congeneric rocks increase with the burial depth and are mostly linear with burial depth. 3) The tensile and compressive strengths of sandstone in a same mine are inversely proportional to particle diameter. And the tensile strength of mudstone is bigger than the one of coarse sandstone and conglomeratic sandstone. © 2019, Editorial Board of Journal of Mining & Safety Engineering. All right reserved.