The Development of Rock Failure Electromagnetic Emission Monitoring System

Abstract:

The research about electromagnetic emission (EME) during rock failure is very important to earthquake prediction and mine safety. A corresponding monitoring system has been developed according to the characteristics of EME signals during rock fracture, which include a wide frequency band and small amplitude of the inductive signals. The system is constituted by electromagnetic induction probe, signal-conditioning circuit and a computer for data acquisition. Among them, the electromagnetic induction probe can detect spatial magnetic field changes in a certain direction and convert it into electrical signals, the signal-conditioning circuit can magnify, filter and isolate signals acquired by the probe, and the computer for data acquisition is used for recording and displaying the detected signals. Several testing results have been achieved in rock failure experiments on marble that are carried out both by mechanical loading and expansion caused by chemical agents.

• Periodical: Applied Mechanics and Materials (Volume 330)
• Pages: 401-406
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.330.401
• Online since: June 2013
• Authors: Song Ling Huang, Fu Rong Zhu, Hong Xiu Zhu, Zheng Wei, Shen Wang
• Keywords: Electromagnetic Induction, LabVIEW Programming, Rock Failure Electromagnetic Emission, Signal-Conditioning Circuit

References

[1] GUO Zi-qiang, LIU Bin. Frequency Properties of Electromagnetic Emission Associated with Microscopiccracking in Rocks. Chinese Journal Geophysics, 1995, 38(2): 1- 4 (in Chinese)

[2] Cress, G.O, Brady, B.T and Rowell, G.A. Sources of Electromagnetic Radiation from Fracture of Rock Samples in The Laboratory. Geophys Res Lett, 1987, 14: 331- 334

DOI: 10.1029/gl014i004p00331

[3] G.E. Yakovitskaya. Some Features of the Electromagnetic Radiation Signals during Rock Failure. Journal of Mining Science, 2004, 40(3): 236- 240

DOI: 10.1007/s10913-005-0003-6

[4] CHEN Guo-qiang. An Experiment on Rock Deformation and Electromagnetic Emission. Ms D Thesis. Beijing: Institute of Geology, China Earthquake Administration, 2009: 5- 17 (in Chinese)

[5] SHAO Ying-qiu. Magnetic Induction Sensor Parameter of Loop and Study of its Interface Circuit. Ms D Thesis. Jilin: Jilin University, 2008: 5- 6 (in Chinese)

[6] Sergio Franco: Design with Operational Amplifiers and Analog Integrated Circuits.(LIU Shu-tang, ZHU Mao-lin, RONG Mei, etc, Translate. Xi'an：Xi'an Jiaotong University Press, 2009 (in Chinese))

[7] HCNR201 Technical Data, Agilent Technologies