中文摘要：

利用RMT-150C岩石力学试验系统，选用十字型钎头和一字型钎头对花岗岩进行了不同加载速率下单轴压入破碎试验，采用多通道AE信号检测系统采集了花岗岩破坏的声发射信号．结果表明：加载速率对受载岩石内部声发射活动有较大影响，岩石声发射累积能量及声发射振铃计数均随加载速率的增加而增加，到达一定程度增加幅度下降；十字型钎头与一字型钎头相比，岩石破碎声发射活动更加活跃，释放的声发射能量更多，破岩效果更加明显；适当增加施加载荷的速率以及选择合适的钎头对脆性岩石破碎有较好的效果．

英文摘要：

Using the RMT-150c rock mechanics test system, this shaped drill bits and carries out the axial compression test about the adopts paper selects the cross-shaped granite under different loading and barrates. It the multi-channel AE signal detection system collecting the granite damage acoustic emission signal. Results show that the loading rate has a great influence on acoustic emission activities of rock, and the total acoustic emission energy and acoustic emission ringing in broken rock increases with the increasing loading rate, but the increasing amplitude declines when it reaches a certain degree; compared with bar shaped drill bit, the granite damage acoustic is more active when it is under cross- shaped drill bit, and the more the acoustic emission energy releases, the more obvious the rock broken effect is. Increasing the loading rate properly and selecting proper bits has good effects on the brittle rock＇ s breaking.