摘要
巷道失稳和维护困难是困扰高地应力深部矿井的普遍问题,严重影响矿井的生产和经济效益的提高。深部矿井高地应力巷道有其自身的应力分布特点,对巷道的支护设计提出了更高的要求。研究从巷道断面优化着手,根据深部矿井高地应力巷道的地质赋存特征,结合淮南-780m水平现场地应力测试及室内岩石物理力学性质测试结果,运用FLAC3D三维显式有限差分法分析软件,建立巷道支护的三维数值计算模型,通过对几种方案巷道周边塑性区分布、应力场、位移场等的分析对比,得到了较为易于维持巷道稳定的巷道断面优化设计方案。
Structure and support failures of mine tunnels are general problems for deep mines in high in situ stress rock masses, and they have great influence on production and economic performance of mines. Based on geological conditions of rock masses and measurements of in situ stress and laboratory tests results, 3 numerical models are set up to optimize tunnel shape which will be constructed in -780 m level of Huainan Mines. 3D numerical simulations of the models have been performed and compared for the best tunnel shape for both the stability and convenient construction. The optimal shape is suggested based on numerical results of distribution of plastic zones, tensile stress zones and displacements at key points. The optimal scheme is applied into the practical case.
出处
《岩石力学与工程学报》
EI
CAS
CSCD
北大核心
2004年第z2期4960-4965,共6页
Chinese Journal of Rock Mechanics and Engineering
基金
中国科学院知识创新工程(KJCX2-SW-302)和国家自然科学基金(50379052)联合资助项目
关键词
数值分析
高地应力
优化
数值计算
支护
numerical analysis, high in situ stress, optimization, numerical simulation, support
