The surrounding rock of roadway is a kind of complex geologic body showing the mechanics characteristic of elasticity, elasto-plastic, visco-plastic and so on.
巷道围岩是一种复杂地质体，表现出弹性、弹塑性、粘弹性、粘塑性等多种力学特性。
2
The analysis of 3D elasto-plastic FEM is introduced for calculating the deformation of the ground surface caused by underground mining under thick rock overburden.
介绍了在厚覆盖岩层条件下，确定地下采矿引起地表变形特征的三维有限元弹塑性计算分析工作。
3
The conditions can be characterized by "polygonal" constitutive laws which influence behaviour of materials, such as elastic, elasto-plastic, contact problems and their combinations.