Dynamic Mechanical Characteristics of Copper-bearing Serpentine under the Combined Action of One-dimensional Static Load and Frequent Disturbance#br#

WANG Chun,TANG Lizhong,CHENG Luping, DENG Lifan,CHEN Yuan

Journal of Vibration and Shock ›› 2016, Vol. 35 ›› Issue (9) : 219-226.

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PDF(2258 KB)
Journal of Vibration and Shock ›› 2016, Vol. 35 ›› Issue (9) : 219-226.

Dynamic Mechanical Characteristics of Copper-bearing Serpentine under the Combined Action of One-dimensional Static Load and Frequent Disturbance#br#

  • WANG Chun,TANG Lizhong,CHENG Luping, DENG Lifan,CHEN Yuan#br#
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Abstract

The dynamic experiment of copper-bearing serpentine under one- dimensional static load and frequent disturbance is been tested to study the mechanical properties of copper-bearing serpentine, which is carried out in the improved SHPB test system of the rock coupled static and dynamic loads for the questions of high stress concentration and blasting disturbance with deep exploitation in Dongguashan Copper Mine. The results show that a phenomenon of concave do not appeared in the initial stage of dynamic stress-strain curve when the pre axial compression promote the rock’s internal micro fracture complete closed, while not. When the rock’s internal stored elastic force is greater than the frequent disturbance, the rebound phenomenon appear after the dynamic stress reaches peak stress, otherwise do not appear. With the disturbance impact times increasing, dynamic peak stress and deformation modulus decrease while maximum strain and the strain corresponding to the peak stress increase. The results also shows that the stress is maximum when the axial compression is sixty percent of the uniaxial compressive strength. With the axial load increasing, the average value of dynamic peak stress increases first and then decreases. The maximum and average cumulative disturbance impact times decrease expressing a fourth order polynomial relations.
 

Key words

copper-bearing serpentine / one-dimensional static load / frequent disturbance / deformation characteristic / peak stress / deformation modulus

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WANG Chun,TANG Lizhong,CHENG Luping, DENG Lifan,CHEN Yuan. Dynamic Mechanical Characteristics of Copper-bearing Serpentine under the Combined Action of One-dimensional Static Load and Frequent Disturbance#br#[J]. Journal of Vibration and Shock, 2016, 35(9): 219-226

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