基于Hoek-Brown准则确定岩石材料强度参数的新方法

doi:10.13722/j.cnki.jrme.2014.0186

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摘要对Mohr-Coulomb准则和Hoek-Brown准则关系进行分析，提出基于Hoek-Brown准则的连续非线性黏聚力和内摩擦角计算公式，并对Hoek-Brown参数对强度参数的影响及计算公式的合理性进行讨论。研究表明：参数s较其他参数对内摩擦角和黏聚力的影响程度小，黏聚力随小主应力的增高而增大，内摩擦角则随小主应力的增高而减小；采用提出的强度参数计算公式和Hoek等效强度计算公式，对7种具有非线性强度特征的岩块和锦屏二级水电站工程的大理岩岩体的强度参数进行计算，对比分析可见计算公式结果与岩块室内三轴试验和工程岩体现场大剪试验的强度参数试验结果吻合度较高，表明建议的强度参数计算式在估算岩石材料强度参数时具有较高的准确性，对实际工程具有较强的指导作用。

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关键词 ：岩石力学, Hoek-Brown准则, Mohr-Coulomb准则, 内摩擦角, 黏聚力

Abstract：Continuously nonlinear formulas of friction angle and cohesion on the basis of Hoek-Brown criterion were proposed，and the impact of Hoek-Brown parameters on strength parameters of Mohr-Coulomb criterion and the rationality of formulas was discussed. The study shows that the material constant s has little influence compared with other Hoek-Brown constants on friction angle and cohesion. The cohesion increases with the increase of minor principal stress，while friction angle does the reverse. Through the conclusion from the contrast between strength parameters，which computed respectively by formulas in this paper and Hoek recommended equation，and the experimental results get from the triaxial tests of several rock and the in-situ shear tests of a practical project，it also indicates that equations proposed in this paper have excellent accuracy and guidance effect on the practical project application.

Key words： rock mechanics Hoek-Brown criterion Mohr-Coulomb criterion friction angle cohesion

引用本文:

卓莉1，2，何江达1，2，谢红强1，2，肖明砾1，2. 基于Hoek-Brown准则确定岩石材料强度参数的新方法[J]. 岩石力学与工程学报, 2015, 34(s1): 2773-2782.
ZHUO Li1，2，HE Jiangda1，2，XIE Hongqiang1，2，XIAO Mingli1，2. STUDY OF NEW METHOD TO DETERMINE STRENGTH PARAMETERS OF ROCK MATERIAL BASED ON HOEK-BROWN CRITERION. , 2015, 34(s1): 2773-2782.

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http://www.rockmech.org/CN/10.13722/j.cnki.jrme.2014.0186 或 http://www.rockmech.org/CN/Y2015/V34/Is1/2773

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