Study on shear mechanical properties of sandstone， marble and granite after anchoring
LIU Quansheng1，2，LEI Guangfeng1，3，PENG Xingxin1，3，WEI Lai1，3，LUO Ciyou1，3
(1. State Key Laboratory of Geomechanics and Geotechnical Engineering，Institute of Rock and Soil Mechanics，Chinese Academy of Sciences，Wuhan，Hubei 430071，China；2. Key Laboratory of Safety for Geotechnical and Structural Engineering of Hubei Province，Wuhan University，Wuhan，Hubei 430072，China；3. University of Chinese Academy of Sciences，Beijing 100049，China)
In order to study the change of shear mechanical properties of different natural rock materials before and after anchoring，three representative rocks of white sandstone，marble and granite were selected，and the direct shear test was carried out after the rocks were drilled，anchored and cured. Each rock material is divided into two kinds of conditions，anchorage and without anchorage，three normal stress levels are adopted in the test. The stress and deformation characteristics of different natural rock materials under different normal forces and shear forces are explored，andthe influence of the normal stressesand rock properties on the shear mechanical properties of anchoring jointed rock mass is compared and analyzed. The experimental results show that there are some differences in the anchoring mechanicalproperties between natural rock and the rock-like material such as cement mortar，the equivalent cohesion and internal friction angle of rock joint surface can be increased by bolt anchorage. The compressive strength of the rock material has a significant effect on the mechanical properties of the bolted joints，the weaker the rock is，the more similar in the anchoring mechanical properties of the rock and the rock-like material are; the harder the rock is，the greater the increase in the shear strength of the anchoring joints，the more significant in the reinforcement effect.
刘泉声1，2，雷广峰1，3，彭星新1，3，魏 莱1，3，罗慈友1，3. 白砂岩、大理岩及花岗岩加锚剪切力学特性研究[J]. 岩石力学与工程学报, 2018, 37(S2): 4007-4015.
LIU Quansheng1，2，LEI Guangfeng1，3，PENG Xingxin1，3，WEI Lai1，3，LUO Ciyou1，3. Study on shear mechanical properties of sandstone， marble and granite after anchoring. , 2018, 37(S2): 4007-4015.
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2018, Vol. 37 
