Evaluation of load transfer mechanism under axial loads in a novel coupler of dual height rock bolts

• Published in: International journal of mining science and technology Vol. 31; no. 2; pp. 225 - 232
• Main Authors: Kumar, Ranjan, Mandal, Prabhat Kumar, Narayan, Ashish, Das, Arka Jyoti
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01.03.2021; Elsevier
• Subjects: Dual height rock bolts; Expansion shell; Laminated roof strata; Rock bolt coupler; Roof rock reinforcement; Underground mining; Dual height rock bolts; Roof rock reinforcement; Underground mining; Expansion shell; Laminated roof strata; Rock bolt coupler

The effective reinforcement of two or more overlying layers of mine openings in a single installation is usually done by coupling of two standard rock bolts mainly during the extraction of medium-thick coal seams. However, field observations show that the couplers of multiple bolts often degrade or...