摘要
利用FLAC3D软件对某深部煤巷开采进行数值模拟研究,计算中采用FLAC3D中的Burgers蠕变模块,分析巷道围岩在深部高应力条件下的围岩蠕变变形破坏特征,得到了该区域巷道围岩的应力应变分布规律。结论:1)在巷道蠕变初期,整个巷道应力分布不均匀且波动很大,随着蠕变时间增加,应力变化基本处于稳定阶段;2)在巷道蠕变初期,位移变化很大,且在巷道中部位移变化量最为集中和明显,而且水平位移变化量大于竖直位移变化量,说明帮部支护对围岩稳定性尤为重要。为巷道支护的设计以及巷道围岩蠕变的规律提供参考依据。
Numerical simulation study on a deep mining coal roadway was conducted by using software FLAC3D. In the calculation,Burgers creep module of FLAC3D was used to analyze the reep of roadway surrounding rock deformation and failure characteristics under conditions of high stress inthe deep part. As a result,the stress and strain distribution in the region around the tunnel rock was obtained. And the following conclusions were attained：1）at the beginning of the roadway creep,the entire roadway was under the uneven distribution of stress and volatile,with the increase in creep time stress was in a stable phase;2）at the beginning of the roadway creep,the displacement was large,and the most concentrated and visible change was in the amount of displacement of the central roadway while the horizontal displacement and vertical displacement were greater than the amount of change which indicated that the section for supporting the support on surrounding rock stability was particularly important. The study provided a reference for the design and creep law of roadway tunnel support.
出处
《成都工业学院学报》
2016年第2期1-4,共4页
Journal of Chengdu Technological University
基金
国家自然科学基金"深部煤岩稳定性量化判别研究"(51374009)
