| 基于Hoek-Brown准则的破裂围岩应力分析 |
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| 引用本文： | 蒋斌松,杨乐,时林坡.基于Hoek-Brown准则的破裂围岩应力分析[J].固体力学学报,2011(Z1). |
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| 作者姓名： | 蒋斌松 杨乐 时林坡 |
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| 作者单位： | 中国矿业大学深部岩土力学与地下工程国家重点实验室; |
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| 基金项目： | 国家自然科学基金(51174196)资助 |
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| 摘 要： | 深部煤矿巷道在高围压的作用下,围岩普遍出现破裂,而且围岩破裂范围在扩大的同时,往往出现继续破坏的现象,并形成不同的分区.论文针对长的圆形巷道,将围岩分成破裂、塑性和弹性三个区域,采用Hoek-Brown准则,进行非关联弹塑性分析,获得了其应力和变形的封闭解析解,并说明该解析解是不唯一的.通过利用在弹塑交界处应力连续的条件、以及在破裂和塑性交界处径向应变连续的条件,获得了确定围岩破裂区和塑性区半径的解析算式.最后,通过算例并分析了破裂区和塑性区应力和应变的分布特点、以及破裂区范围的影响.利用所获得的结果,可以为巷道的稳定性分析以及支护设计提供理论依据.
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| 关 键 词： | 圆形巷道 围岩 破裂区 弹塑分析 解析解 |
STRESS ANALYSIS OF CRACKED SURROUNDING ROCK BASED ON HOEK-BROWN CRITERION |
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| Binsong Jiang Le Yang Linpo Shi.STRESS ANALYSIS OF CRACKED SURROUNDING ROCK BASED ON HOEK-BROWN CRITERION[J].Acta Mechnica Solida Sinica,2011(Z1). |
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| Authors: | Binsong Jiang Le Yang Linpo Shi |
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| Institution: | Binsong Jiang Le Yang Linpo Shi(State Key Laboratory for GeoMechanics & Deep Underground Engineering,China University of Mining & Technology,Xuzhou,221008) |
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| Abstract: | Exerted by the high in-situ stress,the surrounding rocks of deep coal mines of an opening are cracked frequently.And at the same time that the region of the cracked surrounding rocks is enlarged,the case of the surrounding rocks to be re-cracked can be taken place,and it forms the different region.In this paper,it is assumed that a mine opening is long and circular.The surrounding rocks are divided into three regions that are a cracked region,a plastic region and an elastic region.With Hoek-Brow yield crite... |
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| Keywords: | circular opening surrounding rocks cracked region elasto-plastic analytical solution |
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