【摘要】 通过现场观测和分析,认为存在一个使巷道围岩发生显著变形的临界深度。将埋深超过此临界深度的巷道定义为深井巷道。应用弹塑性力学理论建立了巷道围岩系统的势能函数,进而用突变理论方法建立了巷道围岩系统尖点突变模型,从而提出了一种确定深井巷道临界深度的方法,为深井巷道支护设计提供了参考,并给出了工程实例。更多还原

【Abstract】 Analysis show that there is a critical depth below which remarkable deformation will occur in the surrounding rock of the entry. The entry deeper than the critical depth is defined as deep entry in this paper. The potential energy function of the surrounding rock system of the entry is gained on the basis of the elastoplastic theory. Then the cusp catastrophic model of the surrounding rock system of the entry is established. Thereby,the method for determining the critical depth is presented for support design of the deep entry,and a practical case is given.更多还原