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《Metal Mine》 2007-12
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Rock Burst Mechanism Based on Rock Damage and Acoustic Emission Theory

Zhang Yanbo~(1,2) Kang Zhiqiang~2 Jiang Guohu~3 Xu Dongqiang~4 (1.China University of Mining & Technology;2.Hebei Polytechnic University;3.Hebei Luanping Land and Resource Bureau;4.Hebei University of Technology)  
Micro-cracks will form and expand in brittle materials such as rocks with the increase of load,which will be accompanied by acoustic emission.Acoustic emission is a good tool for studying the damage evolution in brittle materi- als,and it can be used to monitor the formation and growth of the microwaves in brittle materials in a continuous and real- time way,which is a predominance that other methods do not possess.Linearity equation of acoustic emission and damage variables were set up by using statistic rules and continuous damage mechanic theory.Biaxial compression experiments were made by marble rocks with various pore rates.Rock burst under bidirectional loads was simulated,acoustic emission char- acteristic of the damage process studied,and the mechanism of rock burst occurrence was analyzed from the viewpoint of rock damage.The study indicates that rock acoustic emission testing technology,which can be used to trace the formation and development process of rock burst,is a scientific and effective method for studying rock burst mechanism.
【Fund】: 河北理工大学科研基金项目(编号:200527)
【CateGory Index】: TU452
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