Advances in statistical mechanics of rock masses and its engineering applications
Advances in statistical mechanics of rock masses and its engineering applications
复制标题
DOI：
10.1016/j.jrmge.2020.11.003
复制
发表时间：
2021-02
影响因子：
7.3
通讯作者：
Faquan Wu;Jie Wu;H. Bao;Bo Li;Z. Shan;Deheng Kong
中科院分区：
文献类型：
--
作者：
Faquan Wu;Jie Wu;H. Bao;Bo Li;Z. Shan;Deheng Kong
为了有效地将岩石连续介质力学与岩体结构统计联系起来，在过去三十年中发展了一种称为岩体统计力学（SMRM）的理论和方法体系。在SMRM中，基于表征岩体结构的几何概率模型，建立了节理岩体的应力应变关系、强度和破坏概率的等效连续体模型。这遵循统计物理学、连续介质力学、断裂力学和最薄弱环节假设。作为 SMRM 理论的导数，还开发了压缩和剪切条件下的一般本构模型和完整的应力-应变模型。随后开发了SMRM计算系统，为岩体参数估计提供快速、精确的解决方案，例如全向岩体质量指标（RQD）、弹性模量、库仑抗压强度、岩体质量等级以及泊松比和抗剪强度。 SMRM 中涉及的本构方程被集成到基于 FLAC3D 的数值模块中，以应用于工程岩体。还能够分析岩体的完全变形和工程岩体的主动加固。介绍了SMRM的工程应用实例，包括中国西北QBT水电站的岩体、刚果民主共和国Zongo II水电站的坝坡。刚果、中国德兴露天矿、中国西南部锦屏一级水电站地下厂房、中国兰渝铁路典型环形隧道。这些应用验证了 SMRM 的可靠性，并证明了其对与节理岩体相关的广泛工程问题的适用性。
To efficiently link the continuum mechanics for rocks with the structural statistics of rock masses, a theoretical and methodological system called the statistical mechanics of rock masses (SMRM) was developed in the past three decades. In SMRM, equivalent continuum models of stress–strain relationship, strength and failure probability for jointed rock masses were established, which were based on the geometric probability models characterising the rock mass structure. This follows the statistical physics, the continuum mechanics, the fracture mechanics and the weakest link hypothesis. A general constitutive model and complete stress–strain models under compressive and shear conditions were also developed as the derivatives of the SMRM theory. An SMRM calculation system was then developed to provide fast and precise solutions for parameter estimations of rock masses, such as full-direction rock quality designation (RQD), elastic modulus, Coulomb compressive strength, rock mass quality rating, and Poisson’s ratio and shear strength. The constitutive equations involved in SMRM were integrated into a FLAC3D based numerical module to apply for engineering rock masses. It is also capable of analysing the complete deformation of rock masses and active reinforcement of engineering rock masses. Examples of engineering applications of SMRM were presented, including a rock mass at QBT hydropower station in northwestern China, a dam slope of Zongo II hydropower station in D.R. Congo, an open-pit mine in Dexing, China, an underground powerhouse of Jinping I hydropower station in southwestern China, and a typical circular tunnel in Lanzhou-Chongqing railway, China. These applications verified the reliability of the SMRM and demonstrated its applicability to broad engineering issues associated with jointed rock masses.