Multiphysics Coupling Model of Rock Mass considering Damage and Disturbance and Its Application
Multiphysics Coupling Model of Rock Mass considering Damage and Disturbance and Its Application
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DOI：
10.1155/2018/3067120
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发表时间：
2018-09
影响因子：
1.8
通讯作者：
Wei Wang;Zhouquan Luo;Yaguang Qin;Jun Xiang;L. Wen;Shaowei Ma
中科院分区：
文献类型：
--
作者：
Wei Wang;Zhouquan Luo;Yaguang Qin;Jun Xiang;L. Wen;Shaowei Ma
针对传统多物理场耦合模型的不足，通过定义弹塑性损伤变量，考虑强度参数的劣化，并采用Weibull分布函数表示强度参数的非均匀性。此外，建立了有效应力与各向异性渗透矩阵之间的关系，并将爆炸转化为荷载边界条件。在此基础上，建立了考虑损伤和扰动的改进多物理场耦合模型，并编制了相应的有限元计算程序。以某采场为研究对象，采用改进的多物理场耦合模型分析了采动应力、渗流及破坏特征，并与实测数据进行了对比。结果表明，改进后的模型更准确地反映了采动破坏的程度和范围，与实际检测结果吻合较好。这些结果进行了比较，传统的多物理场耦合模型和一个单一的物理模型。结果表明，改进后的多物理场耦合模型和相应的计算程序是有效的、合理的。
Aiming at the deficiency of the conventional multiphysics coupling model, the deterioration of strength parameters was considered by defining elastoplastic damage variables, and the heterogeneity of strength parameters was expressed by the Weibull distribution function. In addition, the relation between effective stress and the anisotropic permeability matrix was established, and the blast was transformed into a load boundary condition. On this basis, an improved multiphysics coupling model that considered damage and disturbance was constructed, while a corresponding finite element calculation program was developed. Taking an excavation stope as the object, the characteristics of the mining-induced stress, seepage, and failure were analyzed by an improved multiphysics coupling model and compared with actual detection data. The results show that the improved model reflects the extent and range of mining-induced failure more accurately and fits well with the actual detection. These results are compared to the conventional multiphysics coupling model and a single physics model. It is indicated that the improved multiphysics coupling model and corresponding calculation program are effective and rational.