【摘要】 对汾西高阳煤矿9~#、10~#、11~#煤岩试样进行不同速率下的剪切强度的力学性质试验研究。结果表明:该地区煤岩剪切强度在45°和55°剪切角下随剪切速率的增加有降低趋势,在65°剪切角下为增强趋势。煤岩的剪切峰值强度随法向应力的增加有增强的趋势。剪切峰值强度与法向应力关系曲线基本呈线性。在0.001 mm/s速率下煤岩的黏聚力为1.52 MPa,内摩擦角为36.46°,在0.01 mm/s和0.1 mm/s速率下黏聚力分别为2.44 MPa和2.35 MPa,内摩擦角为25.59°和32.37°。更多还原

【Abstract】 We carried out experimental study on mechanical properties of shear strength with different rates of 9~#, 10~#, 11~#coal rock samples in Fenxi Gaoyang Coal Mine, the results show that the shear strength of the coal and rock in the area decreases with the increase of shear rate at 45 ° and 55°, and increases at the shear angle of 65 °. The peak of shear strength of coal and rock increases with the increase of normal stress. The relationship between shear peak strength and normal stress is linear. Under 0.001 mm/s rate, the cohesion of coal rock is 1.52 MPa, the internal friction angle is 36.46°, and the cohesion is 2.44 MPa and 2.35 MPa at 0.01 mm/s and 0.1 mm/s rate, and the internal friction angle is about 25.59°and 32.37°.更多还原