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不同速率下的煤岩剪切强度力学特性

梁宇, 徐素国, 刘超, 刘正和

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.
引用本文: 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.
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LIANG Yu, XU Suguo, LIU Chao, LIU Zhenghe. Mechanical Properties of Shear Strength of Coal and Rock at Different Rates[J]. Safety in Coal Mines, 2018, 49(2): 5-7,11.
Citation: LIANG Yu, XU Suguo, LIU Chao, LIU Zhenghe. Mechanical Properties of Shear Strength of Coal and Rock at Different Rates[J]. Safety in Coal Mines, 2018, 49(2): 5-7,11.
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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

    摘要
  • 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°。
    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°.
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    [3] Fox D J, Kana D D, Hsiung S M. Influence of roughness on dynamic shear behavior in jointed rock[J].International Journal of Rock Mechanics and Mining Sciences, 1998, 35(7): 923-940.
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    [8] 李海波,冯海鹏,刘博.不同剪切速率下岩石节理的强度特性研究[J].岩石力学与工程学报,2006,25(12):2436-2440.
    [9] 王刚,张学朋,蒋宇静,等.一种考虑剪切速率的粗糙结构面剪切强度准则[J].岩土工程学报,2015(8):1399-1404.
    [10] 周杰,周国庆,赵光思,等.高应力下剪切速率对砂土抗剪强度影响研究[J].岩土力学,2010(9):2805.
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  • 发布日期:  2018-02-19

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