NUMERICAL SIMULATION OF TRIAXIAL COMPRESSION AND INDUCED ACOUSTIC EMISSION CHARACTERISTICS OF ROCK UNDER DIFFERENT CONFINING PRESSURES
The effect of confining pressures on the mechanical properties and acoustic emission (AE) characteristics of rock are simulated using FLAC3D. In triaxial tests simulation, the homogeneous rock exhibits linear strain-softening behaviour and then ideal plastic behaviour once failure occurs. The numerically simulated results indicate that with the increase of the confining pressures the compressive strength and strain of rock increase, whereas the Youngs modulus keeps the same. In addition, using FISH language to compile program, the characteristics of acoustic emission during the triaxial tests of rock are also numerically studied. As the confining pressures increase from null, the cumulative AE events reduce; and the highest AE events increase at first and then decrease. The numerical results agree with the previously numerical results and earlier experimental results.
GUO-YING LI SHU-CAI LI SHU-CHEN LI LI-PING LI
Geotechnical and Structural Engineering Research Center, Shandong University Jinan, 250061, P.R.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
561-568
2009-08-21（万方平台首次上网日期，不代表论文的发表时间）