STUDY OF THE RELATIONSHIP BETWEEN DAMAGE AND AE ENERGY ACUMULATION OF COAL SAMPLES BASED ON THE UN1AXIAL COMPRESSION TEST
Rockburst is the result of a dynamic instability phenomenon of surrounding rock in underground projects in deep high-geostress zones. The prediction and mechanism of rockburst are important issues in many underground projects. The study of the mechanical and physical properties of rock under different loads and physical chemistry conditions is the primary consideration for rockbursts. The relationship between the damage and the AE energy accumulation has been studied by the uniaxial compression test in this paper. First, several coal samples are tested under the uniaxial compression test to obtain the curves of the stress-strain and the AE energy accumulation and strain, which are then fitted by a logarithmic function. Second, based on the Damage Rock Mechanics Theory and the energy conservation equation, the damage evolution model of coal is constructed through analysis of the experimental data. The damage factor varies with the strain and is given by analyzing the experimental data which yields the values of the material constant in the theoretical model. Third, through the relationship between the AE energy accumulation strain and the damage factor strain, the relationship between the AE energy accumulation and the damage factor can be obtained. Based on the damage evolution model and the AE detection method, the results of this paper will provide a theoretical reference for rockburst prediction in coal mines.
XIAO-BIN YANG YUE-PING QIN DA-GUO WANG
State Key Laboratory of Coal Resources and Safe Mining, China University of Mining and Technology Be Center for Material Failure Modeling Research, Dalian University Dalian 116622, China
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
297-300
2009-08-21（万方平台首次上网日期，不代表论文的发表时间）