An Experiment Study on a Novel Self-Swelling Anchorage Bolt
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Rockbolting, which is widely used in geotechnical and mining engineering, is a reinforcement technique to stabilize rock masses through high-strength members such as cablebolts, rebars and steel pipes (Graham 1996). Rock reinforcement improves the load-bearing capacity of rock masses by increasing the strength of the rock masses (Hoek and Brown 1980).
Rockbolts can be divided into three types based on the anchorage mechanism—mechanical bolts, bonded bolts and friction bolts (Hoek et al. 2000). Mechanical bolts are normally used as temporary supports because of its immediate support ability and low cost. The disadvantages of mechanical bolts include strict requirement for borehole drilling and high dependence of the mechanical grip on borehole diameter (Cai and Champaigne 2012).
The strengthening effect of bonded bolts depends on the adhesion of bonding materials grouted into the space between the rockbolt and the borehole wall. Bonded rockbolts include epoxy resin...
KeywordsSelf-swelling anchorage bolt (SSAB) Rock support Laboratory pull-out test Field pullout test Time effect
This study was funded by the State Key Research Development Program of China (2018YFC0604400), the National Science Foundation of China (51874068), the Fundamental Research Funds for the Central Universities (N160107001), and the 111 Project (B17009). The authors wish to thank the staff of Fushun Hongtoushan Copper Mine for providing access to their mine for the field test of the SSAB. The authors also acknowledge laboratory assistant, Jun Tian, for his contributions to the laboratory test. The authors would like to thank the reviewers for their comments and suggestions that greatly improved the quality of the paper.
Compliance with Ethical Standards
Conflict of interest
The authors declare that they have no conflict of interest.
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