岩石的损伤、黏结和摩擦特性研究

尤明庆

doi:10.11779/CJGE201903018

岩石的损伤、黏结和摩擦特性研究 English Version

尤明庆

河南理工大学能源科学与工程学院,河南焦作 454003

详细信息

作者简介:
尤明庆(1964-),男,博士,教授,主要从事岩石力学方面的教学与研究工作。E-mail：youmq@hpu.edu.cn。

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- 文章访问数: 341
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- PDF下载量: 314
出版历程
- 收稿日期: 2018-03-04
- 发布日期: 2019-03-24

Properties of damage, cohesion and friction of rocks

YOU Ming-qing

School of Energy Science and Engineering, Henan Polytechnic University, Jiaozuo 454003, China

摘要

摘要: 收集文献上多种完好及损伤后岩石的常规三轴压缩强度,研究材料的损伤、黏结和摩擦特性及其对围压与强度之间关系的影响。围压增大使裂隙的摩擦承载能力增大,若达到附近材料或其他弱面承载能力后则不再直接影响试样的强度;材料局部损伤的影响随着围压增大降低,试样承载的主应力差以指数形式趋于极限,即最大剪切力等于材料的真实黏结力。大理岩塑性变形引起局部剪切屈服,但真实黏结力没有降低;加热600℃足够长时间后造成使晶界完全开裂则引起真实黏结力降低。岩石剪切破坏时强度与围压的关系可用指数准则描述;不过,花岗岩在围压 20 MPa之内可出现沿轴向劈裂破坏而强度随围压线性增加。
- 岩石力学 /
- 强度准则 /
- 损伤 /
- 塑性变形 /
- 高温烘烤 /
- 黏结 /
- 摩擦
Abstract: The conventional triaxial compressive strengths of intact and damaged rocks are collected to study their properties of damage, cohesion and friction, and to reveal the influences of confining pressure on strength. The bearing capacity of a crack from friction increases with confining pressure, and the crack does not affect the strength of specimen when its bearing capacity achieves that of the materials or other cracks in neighborhood. The effect of localized damage on strength decreases with the increase of the confining pressure, and the difference of the principal stress is well fit to the exponential criterion. There is a limitation of the difference of the principal stress, or the maximum shear stress is equal to the genuine cohesion of rock materials. The genuine cohesion of marble is not influenced by the plastic deformation resulting from shear yield in the specimen, but it will decrease when the grain boundaries of the marble heated to 600℃ are seperated. The exponential criterion can describe the effect of the confining pressure on the strength of rock specimen in shear failure. However, the granite specimen compressed within the confining pressure of 20 MPa fails splitting along the axial direction, and the strength increases linearly with the confining pressure.
- rock mechanics /
- strength criterion /
- damage /
- plastic deformation /
- high temperature /
- cohesion /
- friction

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参考文献(36)

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其他类型引用(3)

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文章访问数: 341
HTML全文浏览量: 8
PDF下载量: 314
被引次数: 8

岩石的损伤、黏结和摩擦特性研究 English Version

作者简介: 尤明庆(1964-),男,博士,教授,主要从事岩石力学方面的教学与研究工作。E-mail：youmq@hpu.edu.cn。

计量

出版历程

Properties of damage, cohesion and friction of rocks

期刊类型引用(5)

其他类型引用(3)

计量

出版历程

目录

作者简介:
尤明庆(1964-),男,博士,教授,主要从事岩石力学方面的教学与研究工作。E-mail：youmq@hpu.edu.cn。