通过超声波对单轴压缩试验中岩石扩容现象的测试，分析了超声横波在不同岩石压缩过程中的传播情况。
By the test about the volumetric dilatancy in rocks under the uniaxial compression with ultrasonic, the propagation of ultrasonic S-wave was analyzed in the compressing process of different rocks.
最后还对结构面在剪切条件下的扩容特性进行分析，并对现象做出解释。
The dilatancy characteristics of the discontinuities under shearing are analyzed; and an interpretation of the phenomenon is provided.
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