Experimental study on mechanical characteristics of two parallel fractured rock under frozen condition

ZHANG Jin-xun; YANG Hao; SHAN Ren-liang; WU Fu-mei; GUO Zhi-ming

doi:10.16285/j.rsm.2017.12.023

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Experimental study on mechanical characteristics of two parallel fractured rock under frozen condition

更新时间：2026-06-25

- Experimental study on mechanical characteristics of two parallel fractured rock under frozen condition
- Vol. 38, Issue 12, Pages: 3573-3580(2017)
- 作者机构：
  
  1. 北京城建集团有限责任公司博士后工作站,北京,100088
  2. 中国矿业大学力学与建筑工程学院,北京,100083
- 作者简介：
- 基金信息：
- DOI：10.16285/j.rsm.2017.12.023
  CLC： TU457
- Online First：05 June 2018，
  
  Published：2017
- 稿件说明：
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ZHANG Jin-xun, YANG Hao, SHAN Ren-liang, et al. Experimental study on mechanical characteristics of two parallel fractured rock under frozen condition[J]. 2017, 38(12): 3573-3580.
DOI：

ZHANG Jin-xun, YANG Hao, SHAN Ren-liang, et al. Experimental study on mechanical characteristics of two parallel fractured rock under frozen condition[J]. 2017, 38(12): 3573-3580. DOI： 10.16285/j.rsm.2017.12.023.

摘要

裂隙是影响工程岩体稳定的重要因素，而平行双裂隙是一种重要的裂隙分布形式，基于已有的研究成果，开展一系列平行双裂隙类岩石三轴压缩试验，研究裂隙产状对平行双裂隙岩体力学性质和破坏形态的影响。试验结果表明：平行双裂隙岩体强度、弹性模量和泊松比受迹长和迹长比共同影响，受裂隙间距影响较小，随倾角增大，先减小后增大；倾角75%），迹长比较小时（迹长比<1），破坏形态取决于长裂隙；迹长介于两者之间时（贯通率25%～75%），迹长比接近1时，受两条裂隙共同影响。

Abstract

Cracks significantly influence the stability of rock engineering

and two parallel cracks are the severe distribution forms of cracks. A series of triaxial compression tests were conducted on sandstone specimens with two parallel cracks to investigate the effect of fracture morphology on its mechanical properties and failure modes. The results showed that strength

elastic modulus and Poisson’s ratio of fractured rock were influenced by both the trace length and the trace length ratio. It was also found that these parameters decreased first

then increased immediately with dip increments

and less varied with spacing between cracks. When the dip angle was less than 30°

the failure plane initiated from crack tips and propagated through the rock bridge along the direction of principal stress. Shear failures localised within one crack

when the angle was between 30°and 60°. For the rock specimen with small trace length and trace length ratio (continuity 75%)

but the trace length ratio remained relatively small (trace length ratio <1). For the rock with moderate cracks (continuity falls between 25%~75%) and the trace length ratio of approximately 1

failure modes were controlled by two cracks.

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