探矿工程-岩土钻掘工程Issue(2)：15-18,4.
动静组合加载下刀具破岩的力学模型
Mechanical Analysis on Rock Fragmentation under Combined Static and Dynamic Loading
张化民 1于好善 2陈礼仪 1宋刚2
作者信息
- 1. 成都理工大学环境与土木工程学院，四川成都610059
- 2. 中国地质科学院勘探技术研究所，河北廊坊065000
- 折叠
摘要
Abstract
Based on the initial elastic and divisions of work by static and dynamic loads, the hard and intact brittle rock breaking process under static and dynamic loading is divided into 3 stages:elasticity, damage and fracture, which are ana-lyzed by comprehensive use of elastic mechanics, rock mechanics, damage mechanics and fracture mechanics.By the elas-tic half space stress field and shear failure of the rock unit under the concentrated force, the damage of rock crack source and its curve extension path are found;typeⅠand typeⅡcracks are selected as press shear crack extension modes under dynamic load impact.Method to define the damage degree by impact energy (times) is put forward.The lateral crack prop-agation and coalescence of adjacent pit is defined as the end of rock breaking.This mechanical model can be applied in the system simulation, numerical simulation and machines design for rock breaking by combined static and dynamic loading.关键词
动静载荷/岩石破碎/裂纹源/破岩刀具Key words
static and dynamic loads/rock breaking/crack source/cutting tool分类
地质学引用本文复制引用
张化民,于好善,陈礼仪,宋刚..动静组合加载下刀具破岩的力学模型[J].探矿工程-岩土钻掘工程,2013,(2):15-18,4.
