Microcrack fracturing of coal specimens under quasi-static combined compression-shear loading

• Published in: Journal of Rock Mechanics and Geotechnical Engineering Vol. 12; no. 5; pp. 1014 - 1026
• Main Authors: He, Qingyuan, Li, Yingchun, Li, Danqi, Zhang, Chengguo
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01.10.2020; State Key Laboratory of Coal Resources and Safe Mining, School of Mines, China University of Mining and Technology, Xuzhou, 221116, China; School of Minerals and Energy Resources Engineering, University of New South Wales, Sydney, 2052, Australia%State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology, Dalian, 116024, China%Department of Civil Engineering, Monash University, Clayton, Melbourne, VIC, 3800, Australia%School of Minerals and Energy Resources Engineering, University of New South Wales, Sydney, 2052, Australia; Elsevier
• Subjects: Acoustic emission; Coal properties; Microcrack damage (CD); Microcrack fracturing; Microcrack initiation (CI); Microcrack initiation (CI); Acoustic emission; Microcrack fracturing; Microcrack damage (CD); Coal properties

Coal pillars are usually loaded under combined compression-shear stresses at underground coal mines. Their long-term stability is critical to the utilization of underground structures, such as underground reservoirs at coal mines. In this study, a modified rock property testing system was used to ex...