Realization of rock mass nonlinear strength characteristics in unified strength theory based on brittle-shear strength analysis

LI Yuan; LI Zhen; QIAO Lan; LI Miao

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Realization of rock mass nonlinear strength characteristics in unified strength theory based on brittle-shear strength analysis

更新时间：2026-06-25

- Realization of rock mass nonlinear strength characteristics in unified strength theory based on brittle-shear strength analysis
- Vol. 35, Issue S1, (2014)
- 作者机构：
  
  北京科技大学金属矿山高效开采与安全教育部重点实验室,北京,100083
- 作者简介：
- 基金信息：
- DOI：
  CLC： TU452
- Online First：20 June 2014，
  
  Published：2014
- 稿件说明：
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LI Yuan, LI Zhen, QIAO Lan, et al. Realization of rock mass nonlinear strength characteristics in unified strength theory based on brittle-shear strength analysis[J]. 2014, 35(S1).
DOI：

LI Yuan, LI Zhen, QIAO Lan, et al. Realization of rock mass nonlinear strength characteristics in unified strength theory based on brittle-shear strength analysis[J]. 2014, 35(S1). DOI：

摘要

针对统一强度理论（UST）拟合非线性强度的局限和岩土材料强度特点，提出拟合岩土非线性强度特征的脆性剪切分析方法，建立了过渡式双线性强度分解公式。以脆断、剪切双重破坏机制，解释Hoek-Brown准则的非线性特征机制，并推导出体现岩石、岩体类材料非线性强度特征的脆剪强度公式。Mine-by隧道和北山花岗岩强度数据分析显示，在岩体折减强度、试验数据直接拟合实例分析中，脆剪强度与Hoek-Brown强度相关性系数均在0.98以上，在该基础上建立岩体非线性强度脆剪分析的双线性过渡式，并提出对应的统一强度理论形式，实现统一强度理论在拟合岩土非线性强度准则中的扩展。

Abstract

Considering the limitation of the unified strength theory (UST) in nonlinear fitting and nonlinear features of geotechnical materials

a brittle-shear strength analysis method is proposed; and a transition bilinear formula is derived. Nonlinear strength feature of Hoek-Brown criterion is explained based on the double failure mechanism of fracture and shear; and an associated formula with highly correlation is obtained. Mine-by tunnel and the strength of Beishan granite data results analysis show that coefficients of correlation of Hoek-Brown rock mass strength

experimental data and brittle-shear strength values are all above 0.98. Twin formulas of Hoek-Brown criterion in the form of UST are derived based on the brittle-shear nonlinear fitting. Application of UST to fitting nonlinear strength of geotechnical materials is realized.

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