STUDY ON ACOUSTIC EMISSION FORECAST OF COMPRESSIVE RUPTUREOF ROCK SAMPLE
Process of compressive deformation and breakage of rock is certain to be accompanied by occurrence of acoustic emission (AE), and the information of acoustic emission contains plenty of gradual damage precursory information of rock. Study on acoustic emission prediction of compressive rupture of rock has significant meaning by using microseism(acoustic emission) monitoring technology to prevent mine disasters such as roof falling, roof and floor water bursting, rock burst induced by rock breakage. The acoustic emission experimental results under urnaxial compression of sandstone samples indicate that the compressive deformation and damage evolvement process of rock can be well expressed by AE characteristics. In addition, wavelet analysis is an important tool of signal processing, and it aims to accurate analysis, diagnosis and forecast of signal information. Wavelet analysis is particularly suitable to process unstable signal. AE signal of rock compressive rupture is a kind of typical unstable signal with time. According to the discrete data series of AF. parameters with time obtained from the experimental tests on sandstone samples, and through wavelet coefficient decomposition of AE energy rate and calculation, Lipschitz indexes negative a on different scales are obtained. Further analysis indicates that the time when a first becomes negative on different scales can accurately forecast the rock breakage, which agrees with the experimental result. It is of significant meaning for early predicting of the breakage of rock strata.
YONG-JIE YANG DE-CHAO WANG YANG-QIANG ZHANG YONG-JIE YANG YU-SHOU LI GANG ZHOU
Key Laboratory of Mine Disaster Prevention and Control, Shandong University of Science and Technolog State Key Laboratory for GeoMechanics and Deep Underground Engineering, China University of Mining &
国际会议
The 7th International Symposium on Rockburst and Seismicity in Mines(2009年第七届国际岩爆与微振动性学术研讨会)
大连
英文
961-966
2009-08-21（万方平台首次上网日期，不代表论文的发表时间）