点荷载作用下基于声发射监测的岩石加载试验数值模拟

Numerical Simulation of Rock Load Test Based on Acoustic Emission Monitoring Under Point Load

摘要: 利用RFPA^2D对5种尺寸的岩石试件进行点荷载加载数值模拟，从声发射及受载端应力方面分析了点荷载作用下影响岩样试验的有关问题，结果表明：岩样试件在点荷载的作用下，其端部压应力效应对高径比为1∶1～1∶2之间的岩体试验影响不大，否则，端部压应力破坏效应明显，影响试验结果。

Abstract: The five different sizes of rocks specimen under point load was carried on numerical simulation by RFPA^2D, the paper analyzed the relevant problems affecting the rock test under point load from acoustic emission and loading end stress aspects. The results showed that the end stress effect had little affect on the rock with height to diameter ratio between 1:1 and 1:2 under point load, otherwise, it was evident to affect the test results because of end stress effect.