Energy evolution law of copper-bearing serpentine received frequent impact  under common action of high axial compression and confining pressure

WANG Chun; CHENG Luping; TANG Lizhong; WANG Wen; LIU Tao; WEI Yongheng

doi:10.11883/bzycj-2018-0076

Volume 39 Issue 5

May 2019

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WANG Chun, CHENG Luping, TANG Lizhong, WANG Wen, LIU Tao, WEI Yongheng. Energy evolution law of copper-bearing serpentine received frequent impact under common action of high axial compression and confining pressure[J]. Explosion And Shock Waves, 2019, 39(5): 053101. doi: 10.11883/bzycj-2018-0076

Citation:

WANG Chun, CHENG Luping, TANG Lizhong, WANG Wen, LIU Tao, WEI Yongheng. Energy evolution law of copper-bearing serpentine received frequent impact under common action of high axial compression and confining pressure[J]. Explosion And Shock Waves, 2019, 39(5): 053101. doi: 10.11883/bzycj-2018-0076

Citation:

WANG Chun, CHENG Luping, TANG Lizhong, WANG Wen, LIU Tao, WEI Yongheng. Energy evolution law of copper-bearing serpentine received frequent impact under common action of high axial compression and confining pressure[J]. Explosion And Shock Waves, 2019, 39(5): 053101. doi: 10.11883/bzycj-2018-0076

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Energy evolution law of copper-bearing serpentine received frequent impact under common action of high axial compression and confining pressure

doi: 10.11883/bzycj-2018-0076

1.
School of Energy Science and Engineering, Henan Polytechnic University, Jiaozuo 454000, Henan, China
2.
School of Resources & Safety Engineering, Central South University, Changsha 410083, Hunan, China
3.
The Collaborative Innovation Center of Coal Safety Production of Henan, Jiaozuo 454000, Henan, China

Received Date: 2018-03-13
Rev Recd Date: 2018-08-20

Available Online: 2019-04-25

Publish Date: 2019-05-01

Abstract

Abstract

Under the common action of high axial stress and confining pressure, the main types of energy were discussed in the study of frequent dynamic disturbance firstly. At the same time, the formula for calculating elastic energy, plastic energy are deduced before and after the impact disturbance. In order to conduct dynamic test, the horizontal stress, the vertical stress, the influence of blasting excavation disturbance of the deep rock mass were simulated by pre-confining pressure, pre-high axial stress, 0.5 MPa impact pressure, respectively. Based on the experimental results, the dynamic characteristics and energy evolution of the copper serpentine were analyzed. The results show that the cumulative disturbance impact times of copper snake-like rock decrease with the increase of axial pressure, while they increase with the increasing confining pressure, and the dynamic peak stress decreases with the increasing number of disturbances. As the number of disturbances increases, the elastic energy in the rock sample increases first and then decreases, the plastic energy shows a trend of increase, and the ratio of the reflection energy to the incident energy increases while the ratio of the transmission energy to incident energy decreases. The unit volume absorption (release) energy shows the trend of the lower convex curve with the number of disturbances increases. In addition, the averages of unit volume absorption (release) energy decreases first and then increases with the increasing confining pressure, but decreases with the increase of axial pressure.
- high axial compression,
- confining pressure,
- frequent impact,
- elastic energy,
- plastic energy

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References(23)

References

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