Experimental study of crack propagation of rock-like specimens containing conjugate fractures

被引：53
作者：
Sun, Wenbin [1 ,2 ]
Du, Houqian [1 ]
Zhou, Fei [1 ]
Shao, Jianli [1 ]
机构：
[1] Shandong Univ Sci & Technol, Coll Min & Safety Engn, State Key Lab Min Disaster Prevent & Control, Qingdao 266590, Peoples R China
[2] AnHui Prov Anhui Univ Sci & Technol, Key Lab Modern Min Engn, Huainan 232001, Peoples R China
来源：
GEOMECHANICS AND ENGINEERING | 2019年 / 17卷 / 04期
基金：
中国博士后科学基金; 中国国家自然科学基金;
关键词：
rock-like material; conjugate fractures; failure mode; uniaxial compression; cracks propagation; MECHANICAL-BEHAVIOR; BRITTLE SANDSTONE; FAILURE; COALESCENCE; INITIATION; STRENGTH; FLAWS; FISSURES; GROWTH; ZONE;
D O I：
10.12989/gae.2019.17.4.323
中图分类号：
TU [建筑科学];
学科分类号：
0813 ;
摘要：
The presence of defects in nature changes the physical parameters of the rock. In this paper, by studying the rock-like specimens with conjugated fractures, the horizontal angle and length are changed, and the physical parameters and failure modes of the specimens under uniaxial compression test are analyzed and compared with the results of simulation analysis. The experimental results show that the peak strength and failure mode of the rock-like specimens are closely related to the horizontal angle. When the horizontal angle is 45 degrees, the maximum value is reached and the tensile failure mode is obtained. The fracture length affects the germination and propagation path of the cracks. It is of great significance to study the failure modes and mechanical properties of conjugated fracture rock-like specimens to guide the support of fractured rock on site.
引用
收藏
页码：323 / 331
页数：9
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