Journal Published Online: 23 September 2022
Volume 51, Issue 2

Crack Initiation and Propagation of Embedded Three-Dimensional Parallel Cracks in Transparent Rock-Like Material

CODEN: JTEVAB

Abstract

In order to understand the initiation and propagation of three-dimensional (3D) embedded parallel cracks in brittle rock under uniaxial and biaxial compression, a preparation method of a transparent rock-like material was proposed in order to observe the propagation process of cracks in brittle rock. Uniaxial and biaxial compression tests were carried out on the transparent rock-like samples containing two embedded 3D parallel cracks. Four types of crack propagation modes were observed: wing crack, petaloid crack, flat-wing crack, and ring-like crack. It is also found that the direction of lateral pressure relative to the strike of the embedded crack has a significant effect on the propagation direction of new generated cracks: a lateral pressure parallel to the strike of the embedded cracks promotes crack propagation in the direction of the maximum principal stress; on the other hand, a lateral pressure normal to the strike of the embedded cracks promotes cracks propagation around the embedded crack at an angle of 30°–60°, forming ring-like cracks, which is similar to the zonal disintegration phenomenon monitored around deep underground excavations.

Author Information

Jia, Peng
School of Resources and Civil Engineering, Northeastern University, Shenyang, P. R. China
Ji, Wanmin
School of Resources and Civil Engineering, Northeastern University, Shenyang, P. R. China
Qian, Yijin
School of Resources and Civil Engineering, Northeastern University, Shenyang, P. R. China
Zhang, Yabing
School of Resources and Civil Engineering, Northeastern University, Shenyang, P. R. China
Pages: 16
Price: $25.00
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Details
Stock #: JTE20220174
ISSN: 0090-3973
DOI: 10.1520/JTE20220174