Because rock mass possesses heterogeneity, discontinuity and rheology property, there exists some problems on the choice of rock mass mechanical parameter of layer rock mass slope engineering.
由于岩体具有不均匀性、不连续性和随时间变化的特性，目前在层状岩体边坡工程的岩体力学参数选取方面仍然存在一些问题。
Exact Prediction and calculation of mechanical property and drillability of rock can provide the necessary base for the optimization of bits and designing parameters, thereby quickening penetration.
准确预测和计算岩石的力学性质和可钻性是有针对性地优选钻头、优化设计参数，从而提高钻井速度的重要依据。
Based on the theory of Rayleigh wave propagation in layer medium, the variation of wave velocity can reflect the variation of rock and soil mechanical property.
根据瑞雷面波在层状介质中的传播理论，波速的变化可以反映出岩土力学性质的变化。
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