| 基于Hoek-Brown准则的节理岩体能量参数估算 |
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| 引用本文： | 柴波,陶阳阳,杜娟,台大平,王禹.基于Hoek-Brown准则的节理岩体能量参数估算[J].地质科技通报,2020,39(1):78-85. |
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| 作者姓名： | 柴波 陶阳阳 杜娟 台大平 王禹 |
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| 作者单位： | 中国地质大学（武汉）环境学院;中国地质大学（武汉）教育部长江三峡库区地质灾害研究中心;中国科学院地质与地球物理研究所 |
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| 基金项目： | 国家自然科学基金项目41572256国家自然科学基金项目41877253中央高校基本科研业务费专项资金资助项目CUGL160408 |
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| 摘 要： | 岩体变形和破坏可以看作能量耗散和释放的过程.由于节理岩体结构复杂且难以开展室内试验,因此无法通过试验直接求取其能量学参数.基于Hoek-Brown准则和岩石能量理论,提出了节理岩体在临界状态能量学参数的估算方法.针对含贯通节理(或层面)岩体,通过修正岩块单轴抗压强度以体现贯通节理的方向效应.采用PFC3D分别模拟小尺寸岩样(Φ50mm×100mm)和大尺寸岩体(Φ2m×2m)的三轴压缩试验,通过岩石三轴试验结果拟合岩石数值模拟的细观参数并应用于节理岩体的模拟.根据节理岩体模拟得到应力应变曲线和能量流,验证了Hoek-Brown准则对节理岩体能量参数估算的合理性.
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| 关 键 词： | 岩体能量参数 三轴压缩试验 数值模拟 节理岩体 |
| 收稿时间： | 2019-11-27 |
Energetics parameter estimation of jointed rock mass based on Hoek-Brown failure criterion |
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| Chai Bo,Tao Yangyang,Du Juan,Tai Daping,Wang Yu.Energetics parameter estimation of jointed rock mass based on Hoek-Brown failure criterion[J].Bulletin of Geological Science and Technology,2020,39(1):78-85. |
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| Authors: | Chai Bo Tao Yangyang Du Juan Tai Daping Wang Yu |
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| Institution: | (School of Environment Studies,China University of Geosciences(Wuhan),Wuhan,430078,China;Three Gorges Research Center for Geo-hazards of Ministry of Education,China University of Geosciences(Wuhan),Wuhan,430078,China;Institute of Geology and Geophysics,Chinese Academy of Sciences,Beiing 100029,China) |
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| Abstract: | The deformation and failure of rocks are a process of energy dissipation and release. For the jointed rock masses, the estimation of energetics parameters during loading procedures is a challenge because of their complex structures and difficulties of laboratory tests. The paper proposed a methodology for the energetics parameter estimation of jointed rock masses in critical state based on the Hoek-Brown failure criterion and rock energy theory. For the rock mass with continuous joints (or layers), the orientation effect of continuous joints was reflected by the revised uniaxial compressive strength of rock piece. The PFC3Dnumerical simulation software was used to simulate the triaxial compressive process with small size models of rock pieces (Φ50 mm×100 mm) and big size models of rock masses (Φ2 m×2 m). The mesoscopic parameters of rock numerical model were calibrated by the result of triaxial compression test and applied for the numerical simulation of jointed rock mass. The estimated energetics parameters derived from Hoek-Brown failure criterion were proved to be accurate by the validation with simulated stress strain curves and energy curves. |
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| Keywords: | energetics parameters of rock mass triaxial compressive test numerical simulation jointed rock mass |
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