深部巷道围岩分区破裂机理的大规模科学计算与物理试验研究

项目名称： 深部巷道围岩分区破裂机理的大规模科学计算与物理试验研究

项目编号： No.50809012

项目类型： 青年科学基金项目

立项/批准年度： 2009

项目学科： 交通运输

项目作者： 张永彬

作者单位： 大连理工大学

项目金额： 20万元

中文摘要： 随经济建设的快速发展，交通、水利水电及能源工程不断向深部延伸，向大型方向发展。在深部岩体中开挖洞室或者巷道时，在其两侧和工作面前的围岩中产生逐次交替破裂区和未破裂区，称之为"分区破裂（zonal disintegration）"，它是深部岩石力学研究中的重要问题。其形成机理尚不十分清楚。本项目以此为研究背景，结合物理模型试验，应用三维岩石破裂过程并行分析系统（RFPA3DParallel），对洞室围岩在不同应力状态、不同洞形、不同围岩条件、不同开挖顺序等条件下，分区破裂形成过程及其特征进行系统的物理与数值试验研究，并充分发挥数值分析方法的优势，从应力和声发射分布随破裂过程的演化规律入手，进一步认识分区破裂现象的机理和规律。本研究的成果有助于深入了解深部巷道围岩的破坏发生机制，为深部岩体洞室开挖和支护设计提供重要的理论基础，具有重要的理论和实际意义。

中文关键词： 深部岩体洞室；分区破裂；并行计算；模型试验；数值试验

英文摘要： With the rapid development of national economy and defense works，traffic engineering, hydraulic engineering and energy engineering extend to deep level. Unfractured and fractured zones successively distribute within rock mass around deep tunnel and in the front of working face. This phenomenon is referred to zonal disintegration (crack formation), which is an important research subject of rock mechanics. Its mechanism is not very clear at present. Based on this background, the program is carried out to study the formation mechanism of zonal disintegration with numerical test using RFPA3D-Parallel code combined with physical model tests. It will be implemented that systemic physical and numerical research on the formation of zonal disintegration and characteristic in various stress institution, various tunnel shape, different rockmass properties and different sequences of tunnel excavation. This program takes advantage of numerical test, starting with the rules of stress and acoustic mission distribution with rock failure to study the mechanism and rule. The study on zonal disintegration within surrounding rock mass of tunnel at deep level will help to understanding failure mechanism of rockmass of deep tunnel and it will be of very significant to theory research and engineering.

英文关键词： deep tunnel; zonal disintegration;parallel computation;physical test;numerical test