中文摘要：

选用脆性花岗岩为研究对象，利用岩石破裂过程分析软件RFPA2D，分别对其进行单、双钎头在不同加载速率下的数值模拟试验，得到RFPA2D应力图及相对应同一加载步下的声发射图。结果表明：较单钎头相比，岩石在双钎头协同作用下将会形成应力叠加，且钎头下面的裂纹会对相邻裂纹产生影响，裂纹尖端会产生应力集中，试件破坏释放出的声发射能量和声发射计数更大；随着加载速率的增大，试件释放的声发射总能量增大，且所得竖向载荷增大。

英文摘要：

Using the rock failure process analysis software - RFPA2D, we selected brittle granite as the object and carried out numerical crushing experiment under different loading rates, got the RFPA2D stress diagram and the acoustic emission diagram corresponding to the same loading. The results show that, compared to a single drill bit, the rock will form stress superposition inside when it is under dual drill bits, and the crack under the superposition of stress will impact on adjacent cracks, the crack tip can produce stress concentration, the crushing rock will release more energy and the counts of acoustic emission; with the increasing of loading rate, the total energy of acoustic emission and the vertical load released by the crushing rock will increase.