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

Wenbin Sun, Houqian Du, Fei Zhou and Jianli Shao

Abstract

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 45o, 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.

Key Words

rock-like material; conjugate fractures; failure mode; uniaxial compression; cracks propagation

Address

Wenbin Sun: 1.) State Key Laboratory of Mining Disaster Prevention and Control, College of Mining and Safety Engineering, Shandong University of Science and Technology, Qingdao 266590, People\'s Republic of China 2.) Key Laboratory of Modern Mining Engineering, AnHui Province (Anhui University of Science and Technology), Huainan, 232001, People\'s Republic of China Houqian Du, Fei Zhou and Jianli Shao: State Key Laboratory of Mining Disaster Prevention and Control, College of Mining and Safety Engineering, Shandong University of Science and Technology, Qingdao 266590, People\'s Republic of China

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