MODEL TEST ON THE DEFORMATION AND FAILURE CHARACTERISTICS OF ECOLOGICAL COMPOSITE ROCKBOLT UNDER LATERAL BENDING AND SHEARING EFFECT

The deformation characteristics and failure mode of the Ecological Composite Rockbolt(ECR) under lateral bending and shear effect have never been clarified in terms of experimental and theoretical research. Frist, test process about the double shear model test of ERC were introduced, and then based on the data analysis, the evaluation regularity and characteristics of some physical quantities, such as vertical deformation, axial stress, bending moment, interfacial shear stress etc.,were discussed. Finally, combined with the test results, some suggestions were proposed to optimize subsequent testing schemes. The results show that axial stress, bending moment and shear stress of the ERC reach their peak near the shear surface and decreases very rapidly away from shear surface. Axial stress, bending moment and shear stress of the ERC increases with the increase of load, which primarily arises in the stage of elastic deformation. The pullout load of ERC mainly bear by aluminum and aluminum composite material interface, besides the flexural strength had no significant growth when it entry into the plastic deformation stage.