高地应力条件下围岩破损区岩体力学特性研究

英文篇名：Mechanical Characteristics of Rockmass in Damaged Wall Rock Area at High Ground Stress
中文刊名：金属矿山
英文刊名：Metal Mine
作者：甄红锋 ; 张继勋 ; 刘志远
英文作者：Zhen Hongfeng1 Zhang Jixun2 Liu Zhiyuan3 (1.Shandong Water Polytechnic Institute ; 2.Hehai University ; 3.Dongchangfu Water Exploitation Company ; Liaocheng ; Shandong)
中文关键词：破损区岩体 ; 力学特性 ; 细观损伤力学 ; 等效模型
英文关键词：Rock mass in damaged area ; Mechanical property ; Micro-damage mechanics ; Equivalent model
出版日期：2008-07-15
机构：山东水利职业学院;河海大学;山东聊城东昌府区水利开发公司;
年：2008
期：07
出版单位：金属矿山

摘要

利用细观损伤力学的基本原理,建立了高地应力区围岩稳定分析的细观损伤力学模型,对围岩破坏全过程进行了分析模拟。引入等效模型的概念,对破损区域内围岩在破坏前后分别建立等效模型,进行数值力学试验,根据试验得到的力学特性曲线,对围岩开挖破碎带岩体主要力学参数(强度、变形模量等)随施工过程的变化规律进行了深入的定量研究,得到了岩体主要力学参数的变化数值,为岩体稳定分析和结构设计提供了可靠的依据,同时也进一步明确了开挖后围岩扰动区域的划分标准。
Based on the micro-damage mechanical principle,a micro-damage mechanical model for the stability analysis of high ground stress area was established and used in the simulation analysis of the whole process of the wall rock failure.The equivalent models for the wall rock in the damage area before and after its damage were built by adopting the concept of equivalent model.The mechanical property curve obtained from the numerical mechanical experiment was used in the quantitative study of the change regularity of the main mechanical parameters(strength,deformation modulus)of the rock mass in the wall rock excavation fracture zone along with the construction process.The change values of the main mechanical parameters of the rock mass thus obtained has provided a reliable basis for the rock mass stability analysis and the structural design and further defined the partitioning standard for the disturbed areas of the wall rock by the excavation.

引文

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