工程地质学报2016，Vol.24Issue(5)：967-975,9.DOI:10.13544/j.cnki.jeg.2016.05.028
卸荷诱发巷道模型岩爆的发生机理实验研究
UNLOADING TEST FOR ROCKBURST MECHANISM IN TUNNEL MODEL
摘要
Abstract
With research on“surrounding rock-roadway”system,the unloading rockburst can be recreated by the operation of horizontal stress unloading.The results indicate that the unloading rockburst has experienced evolution process of from “nonchalant stage to small particles ejection stage to flake off stage and to rockburst”.The tunnel model produces a number of the process from rockburst to stress adjust then to stress adjust failure and to another rockburst.At the end it forms “V”shape rockburst hole.In the condition of unloading,it exists some relationship between horizontal stress and fracture model.The unloading operation of tunnel model of distribution stress can be obtained from theoretical derivation.Vertical crack stress in different horizontal stresses (8.9MPa,1 3.3MPa, 1 7.8MPa)is taken by modified Griffith failure criteria.The calculation model of “V”shape is established.At the stress point(1 3.3MPa)when the horizontal stress is under 1 3.3MPa,the relationship between horizontal stress and vertical crack stress has a positive correlation.When the horizontal stress is above 1 3.3MPa,the relationship between the horizontal stress and the vertical crack stress is a negative correlation.When the horizontal stress is at 1 3.3MPa,the strain energy concentrated area is the largest,and distance between this area and side wall is the minimum.关键词
岩石力学/卸荷/巷道模型/岩爆Key words
Rock mechanics/Unloading/Tunnel model/Rockburst分类
矿业与冶金引用本文复制引用
刘祥鑫,梁正召,张艳博,姚旭龙,李海洋..卸荷诱发巷道模型岩爆的发生机理实验研究[J].工程地质学报,2016,24(5):967-975,9.基金项目
国家重大基础研究发展计划（973）项目（2014CB047100），国家自然科学基金项目（51374088，51574102，51604117），河北省钢铁联合基金项目（E2016209357）资助． （）
