煤矿安全2018，Vol.49Issue(2)：5-7,11,4.DOI:10.13347/j.cnki.mkaq.2018.02.002
不同速率下的煤岩剪切强度力学特性
Mechanical Properties of Shear Strength of Coal and Rock at Different Rates
摘要
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°.关键词
煤岩/加载速率/剪切强度/法向应力/围岩稳定性Key words
coal and rock/loading rate/shear strength/normal stress/surrounding rock stability分类
矿业与冶金引用本文复制引用
梁宇,徐素国,刘超,刘正和..不同速率下的煤岩剪切强度力学特性[J].煤矿安全,2018,49(2):5-7,11,4.基金项目
国家自然科学基金资助项目(51574174) （51574174）
