Abstract
The electromagnetic emission(EME) induced from the rock containing piezoelectric materials was investigated under both static stress and exploding stress wave in the view of piezoelectric effect. The results show that the intensity of the EME induced from the rock under static stress increases with increasing stress level and loading rate; the relationship between the amplitude of the EME from the rock under different modes of stress wave and elastic parameters and propagation distance was presented. The intensity of the EME relates not only to the strength and elastic moduli of rock masses, but also to the initial damage of the rock. The intensity of EME induced by stress wave reaches the highest at the explosion-center and attenuates with the propagation distance. The intensity of EME increases with increasing the elastic modulus and decreases with increasing initial damage. The results are in good agreement with the experimental results.
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Foundation item: Project(50490274) supported by National Natural Science Foundation of China
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Wan, Gx., Li, Xb. & Hong, L. Piezoelectric responses of brittle rock mass containing quartz to static stress and exploding stress wave respectively. J. Cent. South Univ. Technol. 15, 344–349 (2008). https://doi.org/10.1007/s11771-008-0065-0
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DOI: https://doi.org/10.1007/s11771-008-0065-0