![]() ![]() International Journal of Mining Science and Technology, 2021, 31(5): 913–926. Investigation of the influence of intermediate principal stress on the dynamic responses of rocks subjected to true triaxial stress state. Mechanical behavior of rock-coal-rock specimens with different coal thicknesses. GUO Wei-yao, TAN Yun-liang, YU Feng-hai, et al. ![]() International Journal of Rock Mechanics and Mining Sciences, 2017, 96: 11–22. Progressive mitigation method of rock bursts under complicated geological conditions. GUO Wei-yao, ZHAO Tong-bin, TAN Yun-liang, et al. Under the condition of low lateral pressure, the failure of the specimen is dominated by the tensile mechanism under the condition of relatively high lateral pressure, the area of the specimen close to the free surface is tensile splitting failure, and the area far from the free surface is shear failure. This is because when the lateral pressure reaches a certain value, local failure will be formed during the process of applying lateral pressure. When the lateral pressure is less than 10% uniaxial strength, the peak stress and elastic modulus increase with the increase of lateral pressure but when the lateral pressure is larger than 10% uniaxial strength, the two parameters decrease slightly or keep steady. Results indicate that the brittleness and burst proneness of rock or coal material are stronger than that of gypsum material due to the different mineral compositions and structures. Four rock types have been tested and the formation mechanism of macro-fracture surface is analyzed. To provide experimental data for studying the formation mechanism of layer-crack structure, this study researches the influence of lateral pressure on the mechanical behavior of different rock types. Lots of field investigations have proven that layer-crack structure usually appears during the excavation process of deep rock or coal mass. ![]()
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