STABLE OR UNSTABLE CRACK GROWTHS IN THIN ROCK PLATE UNDER COMPRESSION FOR PREDICTING BUCKLING ROCKBURST
- 出版年：2003
- 作者：Liu Xiaoming
- 单位1：School of Civil and Architecture Engineering
- 语种：中文
- 作者关键词：rockburst；buckling；fracture mechanics；cavern engineering；mining
- 起始页：2011
- 总页数：8
- 刊名：岩石力学与工程学报
- 是否内版：否
- 刊频：月刊
- 创刊时间：1982
- 主办单位：中国岩石力学与工程学会
- 主编：冯夏庭
- 地址：武汉市武昌小洪山
- 邮编：430071
- 电子信箱：kjwang@public.wh.hb.cn
- 网址：//yslx.chinajournal.net.cn
- 卷：22
- 期：12
- 期刊索取号：P478.066357
- 核心期刊：全国中文核心期刊；中国科协优秀期刊；湖北省优秀期刊；EI摘要收录期刊
摘要
Underground cavern opening can cause the surrounding rock tangential compressive stress to raise rapidly. Such high compressive stress increase can result in some original pre-existing cracks growing parallelly to the free surface of the remaining rock. This paper presents a model of crack stable or unstable propagation under compressive stress in thin layers that are separated from the main rock mass due to crack growth. Based on this analysis of flat plate buckling, a rock burst mechanism is presented. Immediate and delayed rock burst mechanism are proposed to explain time dependency in brittle rock sub-critical crack growth under compression. Influence of free surface on the surface-parallel crack growth is also discussed.