Abstract
A Double Shear Model (DSM) was used in a numerical simulation on bolted rock joint shearing performance. An entire bolt deformed as the letter “U” under a shear load between two joints. Near the bolt-joint intersection, the bolt partly deformed as the letter “Z”. There were two critical points along the bolt: one was at the bolt-joint intersection with zero bending moment and the other at the maximum bending moment (plastic hinge) with zero shear stress. The blocks on two sides slid along the bolt as it deformed. A separation area was found between the two joint contact surfaces of the middle rock block and sided block. This area of separation was related to bolt diameter and external forces. We assume that this area is related to the work of external forces. Further research is needed.
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