| 具有沉积弱面试样的剪切拉伸破坏及强度分析 |
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| 引用本文： | 尤明庆,苏承东.具有沉积弱面试样的剪切拉伸破坏及强度分析[J].岩石力学与工程学报,2006,25(Z2):3618-3622. |
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| 作者姓名： | 尤明庆 苏承东 |
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| 作者单位： | 河南理工大学,能源科学与工程学院,河南,焦作,454010 |
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| 摘 要： | 根据一组细砂岩试验结果发现:试样强度较低时,平均模量与强度成正比,表明岩样破坏时内部完好材料需要的弹性变形相同;而较高围压下裂隙闭合、承载能力增大之后,平均模量趋于常数。含有弱面的岩样可能是剪切破坏,也可能是剪切与拉伸组合的破坏,必须依据破裂形式分析试样的强度,分别确定完整岩石或弱面的黏聚力和内摩擦因数,而不能直接以强度与围压的关系回归Coulomb准则。
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| 关 键 词： | 岩石力学 沉积弱面 强度 剪切破坏 拉伸破坏 |
| 文章编号： | 1000-6915(2006)增2-3618-05 |
| 修稿时间： | 2006年4月1日 |
ANALYSIS OF STRENGTH AND SHEAR-TENSILE FAILURE OF ROCK SPECIMENS WITH SEDIMENTARY WEAK PLANE |
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| YOU Mingqing,SU Chengdong.ANALYSIS OF STRENGTH AND SHEAR-TENSILE FAILURE OF ROCK SPECIMENS WITH SEDIMENTARY WEAK PLANE[J].Chinese Journal of Rock Mechanics and Engineering,2006,25(Z2):3618-3622. |
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| Authors: | YOU Mingqing SU Chengdong |
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| Abstract: | Based on experiments of fine sandstone specimens,it is found that the strength is in relation to average modulus when strength is lower,and the modulus becomes a constant when specimen is compressed under higher confining pressure.Rock specimen with sedimentary weak planes may be destroyed in shear or combination of shear and tensile.The strengths and confining pressure can not be directly used to regress for the Coulomb criterion.The cohesion and internal friction coefficient of sound rock and weak plane can be determined after classification of failure specimens under pseudo-triaxial compression results. |
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| Keywords: | rock mechanics sedimentary weak plane strength shear failure tensile failure |
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