摘要
为了研究不同裂隙角度下岩石的强度和破坏特性,对含有不同裂隙角度的花岗岩进行了单轴压缩试验。试验结果表明:次裂隙与水平方向夹角α≤60°时,岩样峰值强度随次裂隙角度的增大而增大,α>60°时峰值强度呈现波动下降趋势,次裂角度0°时试样峰值强度最低;随着次裂隙角度的增加,试样破坏模式表现为拉伸破坏→拉伸剪切破坏→拉伸破坏,岩石破坏形式主要为拉应力破坏。
In order to study the strength and failure characteristics of rock under different fracture angles,uniaxial compression tests were carried out on granite with different fracture angles.The test results show that when the angle between the secondary crack and the horizontal direction is α ≤60°,the peak strength of the rock sample increases with the increase of the secondary crack angle.When α60°,the peak strength shows a fluctuating downward trend,and the peak strength of the sample is the lowest when the secondary crack angle is 0°.With the increase of the secondary crack angle,the failure mode of the specimen is tensile failure→tensile shear failure→tensile failure,and the rock failure is mainly tensile stress failure.
作者
于可鑫
和军涛
吴赛赛
李群
YU Kexin;HE Juntao;WU Saisai;LI Qun(School of Mining Engineering,North China University of Science and Technology;Yisheng Innovation Education Base,North China University of Science and Technology)
出处
《现代矿业》
CAS
2023年第10期87-91,共5页
Modern Mining
基金
河北省大学生创新创业训练计划项目(编号:X2021113)。
关键词
裂隙角度
非等长裂隙
力学特性
破坏模式
crack angle
non-equilong cracks
mechanical activation behavior
mode of failure
