期刊论文

Failure Characteristics of Rock-like Mass with Different Fracture Types under Uniaxial Compression

中文

Dizhen Xuekan

1003-868X

2018

38

6

959-966

10.13409/j.cnki.jdpme.2018.06.009

国家自然科学基金青年项目(51204098) 湖南省科技厅重点研发计划项目(2015SK200584) 湖南省教育厅科研项目(17C1355)资助.

本校为第一机构

采用水泥砂浆制作具有不同倾角、不同裂隙形式和不同岩桥间距的预制裂隙类岩体试样,开展单轴压缩试验。基于滑动裂纹理论,分析在单轴压缩作用下类岩体破坏受力特征和破坏形式。结果表明:裂隙形式、裂隙倾角和岩桥长度等参数变化对试样强度和破坏形式有较大影响,且在不同破坏模式中起主要作用的控制性参数不一样;对于不同倾角的单裂隙和平行双裂隙试样在单轴压缩破坏形式基本类似,当倾角在0°~90°变化时,它们的峰值强度随倾角的变化趋势呈下凹型,当岩桥倾角为45°时试样的峰值强度最低;对于不同岩桥长度不共面断续裂隙试样,试样的抗压强度会随着岩桥长度的增大而逐渐增大,而对于共面断续裂隙试样...

Prefabricated fractured rock-like samples with cracks of different dip angles,different assemblies and different spacings were prepared using cement mortar.Uniaxial compression tests were carried out.The failure characteristics and failure modes of rock mass under uniaxial compression were analyzed based on the sliding crack theory.The result shows that the crack form, dip angle and rock-bridge length have a great effect on the compressive strength and failure mode. But the control parameter which plays a major role in different failure modes i...