| 基于广义Hoek-Brown准则的岩体等效强度 |
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| 引用本文： | 朱志明,章广成,朱娇燕,路辉.基于广义Hoek-Brown准则的岩体等效强度[J].煤田地质与勘探,2012,40(4):52-55. |
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| 作者姓名： | 朱志明 章广成 朱娇燕 路辉 |
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| 作者单位： | 中国地质大学工程学院,湖北武汉,430074 |
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| 摘 要： | 为了更方便地求出岩体的等价粘聚力C和摩擦角φ,基于Hoek-Brown准则与RMR法岩体质量分级,求出不同RMR值下的C和φ,拟合出C和φ的折减系数关于RMR值的变化曲线。结果表明:对于质量等级较好的岩体,根据RMR值可以分别求得岩体的C和φ的折减系数,对已知岩石的C和φ值进行折减,求得岩体的C和φ值。岩体的C值随岩石单轴抗压强度成线性正相关,岩体的φ值不随单轴抗压强度变化而变化。C和φ的折减系数不随岩石的单轴抗压强度变化而变化,只与岩体RMR值有关。
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| 关 键 词： | 广义Hoek-Brown准则 RMR法 折减系数 |
Research on equivalent strength rock mass based on generalized Hoek-Brown failure criterion |
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| ZHU Zhiming
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ZHANG Guangcheng
,
ZHU Jiaoyan
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LU Hui.Research on equivalent strength rock mass based on generalized Hoek-Brown failure criterion[J].Coal Geology & Exploration,2012,40(4):52-55. |
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| Authors: | ZHU Zhiming ZHANG Guangcheng ZHU Jiaoyan LU Hui |
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| Institution: | (Faculty of Engineering,China University of Geosciences,Wuhan 430074,China) |
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| Abstract: | In order to get the equivalent cohesion C and the friction angle φ of the rock mass conveniently,the paper used generalized Hoek-Brown failure criterion and RMR method of rock mass quality classification to calculate the C and φ with the different RMR,and fit the reduction factor of C and φ with RMR curve.The result shows that the reduction factor of C and φ can be calculated according to RMR while the rock mass quality classification is fairly good.The known C and φ of rock was reduced to obtain the C and φ of the rock mass.The C of the rock mass is positively linear related to uniaxial compressive rock strength,and the φ of rock mass is unchanged with the different uniaxial compressive rock strength.The reduction factors of C and φ are unchanged with the different uniaxial compressive rock strength,only concerned with the RMR. |
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| Keywords: | generalized Hoek-Brown failure criterion RMR method reduction factor |
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