基于P波模量的岩石单轴抗压强度预测

传统获取岩石单轴抗压强度参数需要钻进取样、加工制作等严格的试验步骤，需要建立一种参数易于获取且准确的岩石单轴抗压强度预测公式。基于岩石物理力学参数的内在联系，建立了岩石单轴抗压强度与岩石P波模量的关系式。根据英安斑岩和页岩两种岩石的干密度、P波速度及单轴抗压强度的测试数据，采用线性拟合的方法建立了岩石基于P波模量的单轴抗压强度预测公式，并采用统计检验的方法对上述预测公式与传统基于P波速度的预测公式进行了对比分析。结果表明，所建立的强度预测通式简单、精度高，模量容易获取，具有很强的实用性。

Prediction of uniaxial compressive strength of rock based on P-wave modulus

Rock uniaxial compressive strength (UCS) is one of the most important mechanical parameters of rock, which is vital to the design of rock engineering and stability analysis of country rock. Since the rigid procedures of rock drilling and coring, sample processing and testing conditions in rock UCS test, a high-precision model is urgent required for rock UCS prediction, among which the parameters should be easy to get. Based on inherent links of rock physico-mechanical parameters, a relation between rock UCS and P-wave modulus is established. According to the test data of rock dry density, P-wave velocity and UCS from dacite-porphyrite and shale, a UCS prediction formula based on P-wave modulus is obtained by using the linear fitting method, which is verified by statistical test and compared with the traditional prediction formula based on P-wave velocity. The results show that the general prediction formula is simple in form, high in accuracy, and the modulus is easy to obtain, which can be easily applied to practice.