作　　者： ; ;

机构地区： 山东科技大学土木建筑学院

出　　处： 《长江科学院院报》 2012年第8期12-16,共5页

摘　　要： 具有层状沉积效应的岩层呈现明显的各向异性特征,而传统各向同性力学模型不能准确描述巷道开挖非对称破坏现象。基于空间滑动面理论推导各向异性弹塑性模型,并采用C++编程形成动态链接库dll文件,实现在FLAC3D中基于空间滑动面的各向异性弹塑性模型二次开发。通过设计模拟方案验证了模型的可应用性。根据巷道开挖支护模拟分析,在各向异性条件下,锚杆受力呈现非对称分布的状态,经破坏区锚杆加长后模拟计算,围岩塑性区明显减小,且锚杆受力趋向均匀。根据现场应用反馈,基于各向异性分析的关键区锚杆支护是可行的。 The layer-deposited rock has obvious anisotropic characteristics.Traditional isotropic model cannot describe the asymmetric damage caused by roadway construction accurately.In this paper,the FLAC3D calculation scheme of anisotropic elastic-plastic model is derived based on the SMP（spatial mobilized plane） theory.The secondary development of anisotropic elastic-plastic model is implemented though embedding dynamic link library（dll） file into FLAC3D.The availability of this model was verified through designing simulation scheme.Analysis of roadway simulation under the anisotropic condition showed that the distribution of forces on anchors was asymmetric.When the anchors in failure zone were lengthened,the plastic zone decreased and the anchor force tended to be homogeneous.Field application in roadway reveals that anchor bolt support in critical zones based on anisotropic analysis is feasible.

关 键 词： 巷道支护 空间滑动面理论 各向异性弹塑性 二次开发 支护优化

领　　域： [建筑科学] [建筑科学]