基于各向异性弹塑性模型的软岩巷道变形研究

doi:10.3969/j.issn.1001-5485.2012.08.003

长江科学院院报 ›› 2012, Vol. 29 ›› Issue (8): 12-16.DOI: 10.3969/j.issn.1001-5485.2012.08.003

• 岩石力学与工程试验及测试技术专辑 • 上一篇下一篇

基于各向异性弹塑性模型的软岩巷道变形研究

王磊^a,b，王渭明^a,b

山东科技大学 a.土木建筑学院; b.山东省土木工程防灾减灾重点实验室，山东青岛 266590

收稿日期:2012-05-23 出版日期:2012-08-01 发布日期:2012-08-22
基金资助:
国家自然科学基金项目(51174128)

Analysis of Soft Rock Roadway Deformation Based on Anisotropic Elasto-plastic Constitutive Model

WANG Lei^1,2，WANG Wei-ming^1,2

1.College of Civil Engineering and Architecture, Shandong University of Science and Technology, Qingdao 266590, China; 2.Shandong Provincial Key Laboratory of Civil Engineering, Disaster Prevention and Mitigation, Qingdao 266590, China

Received:2012-05-23 Online:2012-08-01 Published:2012-08-22
Supported by:
王磊(1982-)，男，山东日照市人，博士研究生，主要从事岩石力学理论与应用以及城市与矿山地下工程支护等方面的研究

摘要/Abstract

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FLAC^3D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。

关键词: 巷道支护, 空间滑动面理论, 各向异性弹塑性, FLAC^3D二次开发, 支护优化

Abstract: 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 FLAC^3Dcalculation 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 FLAC^3D. 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.

Key words: roadway support, SMP theory, anisotropic elastic-plastic, secondary development in FLAC^3D, anchor support optimization

中图分类号:

TU43

王磊, 王渭明. 基于各向异性弹塑性模型的软岩巷道变形研究[J]. 长江科学院院报, 2012, 29(8): 12-16.

WANG Lei, WANG Wei-Ming. Analysis of Soft Rock Roadway Deformation Based on Anisotropic Elasto-plastic Constitutive Model[J]. JOURNAL OF YANGTZE RIVER SCIENTIFIC RESEARCH INSTI, 2012, 29(8): 12-16.

基于各向异性弹塑性模型的软岩巷道变形研究

Analysis of Soft Rock Roadway Deformation Based on Anisotropic Elasto-plastic Constitutive Model

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