Simulation material experiment on dynamic mechanical properties of jointed rock affected by joint filling material

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Journal of Vibration and Shock ›› 2016, Vol. 35 ›› Issue (12) : 125-131.

Yang Ren-shu 1，WANG Mao-yuan1， Yang Yang 1， Wang Jian-guo 2

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Abstract

Joint model specimens were made with similar material, which have the same properties with the real joint rock, then the impact experiment was carried out on the artificial jointed rock specimens with the help of SHPB test apparatus(50mm), rock dynamic mechanics properties which are affected with the joint filling material were acquired. It is found that with the strength of the filling material reduced, joint specimen quantitative dynamic elastic modulus decrease, the dynamic compressive strength attenuate with an index form, specimens filled with soft material showed plastic deformation and failure, the overall failure pattern of specimens associated with filling material properties; Reflection energy ratio has a increase trend with the strength of specimens decreased, transmission energy ratio would reduce, the energy dissipation ratio is associated with filling material properties. Damage variable and the impact velocity meet the function of , damage value d is 0.458 when the test specimens failure.

Key words

joint rock / simulation experiment / impact loading / SHPB / dynamic response / energy analysis

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Yang Ren-shu 1，WANG Mao-yuan1， Yang Yang 1， Wang Jian-guo 2 . Simulation material experiment on dynamic mechanical properties of jointed rock affected by joint filling material[J]. Journal of Vibration and Shock, 2016, 35(12): 125-131

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