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中文摘要：
从断裂力学的理论出发。分析了弹性渡在裂隙岩体介质中的传播特征；以裂隙岩体的裂隙密度参数在单轴加卸载过程中的不同表达式为基础，建立了裂隙岩体在单轴循环加载过程中各个阶段裂纹重分布后超声波波速的理论公式；同时采用声波实验和单轴循环加载实验相结合的方法。以山东某矿勘探区岩体为试验对象，对取自该矿区的岩样进行了实验。实验结果与理论模型计算结果基本一致．说明对于具有一定分布规律的裂隙岩体介质，弹性渡在其中传播的速度可以通过裂隙岩体的裂隙密度参数求解得到。
英文摘要：
With fracture mechanics theory, the characteristics of elastic wave spreading in fractured rock mass are analyzed. Based on different expressions of fracture density parameters in the process of uniaxial loading - unloading, the theoretical formula of ultrasonic wave velocity in every stage of uniaxial cyclic loading process when fractures redistribute, is put forward. At the same time, with some rock samples from Shandong province, sound wave experiments and uniaxial cyclic loading tests are carried out. The experiment results are coincident with the theoretical ones, therefore, elastic wave speed in fractured rock mass in which fractures distribute regularly, could be calculated with the fracture density parameters.
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