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本文介绍了三类各向异性岩石的强度理论:以哥伦布剪切强度理论为基础的剪切破坏强度理论;以格雷菲斯裂缝理论为基础的拉伸破坏强度理论和以实验为基础的经验公式。推导出它们的计算公式和计算方法。作者根据在美国对卡斯普砂岩和绿河油页岩进行实验的结果,对上述强度理论进行了对比分析,提出了在层面角0°和90°之间峰值强度出现两次极小值的观察结果,证明了荷克-布朗和摩尔-哥伦布这两个经验公式适于顶测试验岩石的峰值强度。但上述公式计算烦杂。作者提出了一个新的经验公式: σ_1=A_1.2β~4+B_1.2β~3+C_1.2β~2+D_1.2β+E_1.2它与实验结果吻合较好。
This paper introduces the strength theory of three kinds of anisotropic rocks: the theory of shear failure strength based on the Columbus shear strength theory; the theory of tensile failure strength based on the Craftwiss fracture theory and the experimental empirical formula . Derive their calculation formula and calculation method. Based on the results of experiments carried out on the Caspian Sandstone and the Green River oil shale in the United States, the authors have conducted a comparative analysis of the above-mentioned strength theories and proposed that the minimum value of the peak intensities appears at 0 ° and 90 ° The observations show that the two empirical formulas, Hockey-Brown and Moore-Columbus, are suitable for testing the peak intensities of rocks. However, the above formula is complicated. The authors propose a new empirical formula: σ_1 = A_1.2β ~ 4 + B_1.2β ~ 3 + C_1.2β ~ 2 + D_1.2β + E_1.2 which agrees well with the experimental results.