深部坑道围岩的变形与承载能力问题  

PROBLEMS OF DEFORMATION AND BEARING CAPACITY OF ROCK MASS AROUND DEEP BURIED TUNNELS

作　　者：陈士林[1] 钱七虎[1] 王明洋[1] 

机构地区：[1]解放军理工大学工程兵工程学院,江苏南京210007

出　　处：《岩石力学与工程学报》2005年第13期2203-2211,共9页Chinese Journal of Rock Mechanics and Engineering

基　　金：国家自然科学基金重大项目(50490275)

摘　　要：通过传统连续介质力学理论描述宏观尺度上的岩块行为,借助光滑函数的组合描述岩块间间断位移场的不光滑性,从而揭示了岩块界面的局部变形行为,使得能量在介质中的存储、耗散与通过间断界面边界转移的能得到数学刻画。在该理论框架下,以圆形坑道围岩压力确定为例,通过简化的应力–滑移关系,计算出围岩各区所承受的荷载比例,阐明了岩石压力与坑道的埋深、坑道的尺寸和形状、围岩的物理力学性质以及支护的柔度等具有直接的关系。The behavior of rock block on a macro-scale is described by the classical mechanics of continuum, while the discontinuous displacement field between rock blocks is represented by a combination of smooth functions, which characterizes the deformational behavior of rock block interfaces. Hence, the way is mathematically described in which the energy is stored, dissipated and transferred between rock block interfaces. In the context of the proposed procedure, taking the determination of rock pressures on a circular tunnel for example, the proportion of pressures around the tunnel resisted by each zone is calculated based on a simplified stress-slip displacement relation; the direct relationships among the rock pressures and the buried depth, dimensions and shape of the tunnel, the physico-mechanical characteristics of rock mass, and the flexibility of supports and etc., are illustrated.

关 键 词：采矿工程 承载能力 滑移间断面 岩石压力 

分 类 号：TD322[矿业工程—矿井建设]