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针对目前大光包滑坡滑带碎裂岩体力学强度参数缺乏研究这一问题,提出基于改进后的Hoek-Brown准则获取岩体力学强度参数的新方法。该方法首先通过岩体基本质量指标BQ、岩体结构等级SR、结构面表面等级SCR与结构面条件因子J_c分别对地质强度指标GSI进行量化取值;在此基础上,建立由岩体基本质量指标BQ估算扰动参数D的计算公式;并以现场调查和室内岩石力学试验为基础,将改进后的方法代入Hoek-Brown准则中,对大光包滑坡滑带碎裂岩体的力学强度参数进行评价。与E.Hoek建议法相比,改进后的方法获取的岩体力学参数偏小,更为接近前人研究中的建议值,证明该方法具有一定的合理性。
Aiming at the lack of research on the mechanical strength parameters of the rock mass in Daguangbao landslide at present, a new method for obtaining the mechanical strength parameters of rock mass based on the improved Hoek-Brown criterion is proposed. The method first quantifies the geological intensity index GSI by the basic mass index of rock mass BQ, the rock mass structural grade SR, the structural surface surface grade SCR and the structural surface condition factor J_c respectively. Based on this, Index BQ to estimate the perturbation parameter D. Based on the field investigation and indoor rock mechanics test, the improved method is substituted into the Hoek-Brown criterion, and the mechanical strength parameters of the slide bulk rock mass in Daguangbao landslide are calculated Evaluation. Compared with E.Hoek’s proposed method, the mechanical parameters of rock mass obtained by the improved method are smaller and closer to the proposed values in previous studies, which proves that the method is reasonable.