摘要
为了研究洞室岩爆特征问题,在洞室围岩变形场演化特征实验研究基础上对洞室岩爆的力学机制进行解释.采用双轴加载方式,对一种含有洞室的砂岩岩板进行压缩实验,通过白光数字散斑相关方法作为实验监测手段,对洞室变形破坏过程中的位移场和应变场演化进行实时监测,根据实验结果对洞室岩爆特征进行分析.研究结果表明:洞室岩爆过程经历了洞室围岩的局部破坏和结构整体失稳破坏两个阶段,从洞室岩爆力学机制可以得出,洞室岩爆是由拉伸和剪切两种作用机制共同作用的结果.
To study the characteristics of chamber rockburst,the mechanics mechanism of chamber rockburst was investigated based on the experimental studies of surrounding rock deformation evolution field.In the experiment,a sandstone rock board with chamber was compressed using biaxial loading mode.Using the white light digital speckle correlation method as an experimental monitoring method,the displacement field and strain field in the process of deformation and failure were monitored in real-time.According to the analysis of experiment,the process of chamber rockburst goes through two stages: local damage of surrounding rockmass and the structural instability and failure.Also,the mechanical mechanism of rockburst shows that the chamber rockburst is caused by the combined actions of stretching and shearing.
出处
《辽宁工程技术大学学报（自然科学版）》
CAS
北大核心
2012年第5期682-685,共4页
Journal of Liaoning Technical University (Natural Science)
基金
国家重点基础研究发展规划(973)资助项目(2010CB226801)
国家自然科学基金资助项目(50904071)
煤炭资源与安全开采国家重点实验室开放基金资助项目(SKLCRSM09KFB11)
关键词
岩爆
洞室
白光数字散斑相关方法
围岩
失稳
双轴加载
最大剪应变
变形场
rockburst
chambers
the white light digital speckle correlation method
surrounding rock
instability
biaxial loading
maximal shear strain
deformation fields
