PHYSICS OF GASES, PLASMAS, AND ELECTRIC DISCHARGES |
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A numerical analytic method for electromagnetic radiation accompanying with fracture of rocks |
Chen Zhen(陈震), Huang Ka-Ma(黄卡玛)† |
Institute of Applied Electromagnetics, Sichuan University, Chengdu 610064, China |
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Abstract This paper studies Rabinovitch's compression experiments on granite and chalk and proposes an oscillating dipole model to analyse and simulate the electromagnetic radiation phenomenon caused by fracture of rocks. Our model assumes that the electromagnetic radiation pulses are initiated by vibrations of the charged rock grains on the tips of the crack. The vibrations of the rock grains are stimulated by the pulses of the cracks. Our simulations show comparable results with Rabinovitch's compression experiments. From the simulation results, it verifies an assumption that the crack width is inversely proportional to the circular frequency electromagnetic radiation, which is presented by Rabinovitch et al. The simulation results also imply that, by using our oscillating dipole model together with Rabinovitch's two equations about the crack length and crack width, we can quantitatively analyse and simulate the electromagnetic radiation phenomenon, which is induced from the fracture of the rocks.
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Received: 24 January 2010
Revised: 15 March 2010
Accepted manuscript online:
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PACS:
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91.60.Ba
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(Elasticity, fracture, and flow)
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91.60.Pn
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(Magnetic and electrical properties)
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91.90.+p
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(Other topics in solid Earth physics)
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Fund: Project supported by the National Natural Science Foundation of China (Grant No. 60531010). |
Cite this article:
Chen Zhen(陈震), Huang Ka-Ma(黄卡玛) A numerical analytic method for electromagnetic radiation accompanying with fracture of rocks 2010 Chin. Phys. B 19 105201
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