NUMERICAL SIMULATION OF ACOUSTIC EMISSION FOR
DEFECTIVE ROCK
HAN Tongchun1,2,ZHANG Jie1,2
(1. Research Center of Coastal and Urban Geotechnical Engineering,Zhejiang University,Hangzhou,Zhejiang 310058,China;
2. Key Laboratory of Soft Soils and Geoenvironmental Engineering,Ministry of Education,Zhejiang University,
Hangzhou,Zhejiang 310058,China)
Abstract:Rock is a heterogeneous material which consists of grains with different strengths. Studies show that different homogeneous rock materials possess different acoustic emission characteristics in uniaxial compression. Researches of these characteristics have an important role in forecasting rockburst. Fish function is drew to realize model which contains random defect units and records events of acoustic emission. Acoustic emission on homogeneous and random defective material in uniaxial compression is simulated with FLAC3D. The differences of homogeneous model and defective model are discussed,as well as the influence of number of defective units on acoustic emission. Results have an important significance for study of rock acoustic emission characteristics.
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