摘要
为探究围岩切向应力集中过程中加载应力分布对岩爆特性的影响,利用自主研制的梯度与气液复合加载岩爆装置,对大尺寸类岩体模型进行均布与梯度应力加载路径下的岩爆模拟试验;从岩爆破坏现象、碎屑形态及分布特征等方面,对比分析均布与梯度应力加载下的模型岩爆特征。结果表明:均布与梯度应力加载下的岩爆破坏特性存在明显差异;均布应力加载下,模型岩爆主要形成以张拉破坏为主的片状、板状碎屑,碎屑弹射距离较近,对应的岩爆烈度小;而梯度应力加载下,模型岩爆主要形成以剪切破坏为主的块状碎屑,相对于均布应力加载,碎屑抛射距离更远,岩爆烈度更大。
In order to study influence of loading stress distribution of surrounding rocks on rockburst characteristics during tangential stress concentration process,rockburst simulation tests were conducted on large class rock-like models under uniform and gradient stress loading by using independently developed gradient and gas-liquid composite loading devices. Then,rockburst characteristics were compared and analyzed from aspects of model burst phenomenon,debris morphology and distribution features. The results show that there are obvious differences in rockburst characteristics between uniform and gradient stress loading. Under uniform stress loading,model rockburst mainly forms flaky and plate-like debris with tensile failure,and ejection distance of debris is relatively short with a smaller rockburst intensity.However,under load of gradient stress,it mainly forms massive debris with shear failure,which has a relatively greater ejection distance and intensity.
作者
夏元友
刘昌昊
刘夕奇
吝曼卿
向红京
喻旭
XIA Yuanyou;LIU Changhao;LIU Xiqi;LIN Manqing;XIANG Hongjing;YU Xu(School of Civil Engineering and Architecture,Wuhan University of Technology,Wuhan Hubei 430070,China;School of Resources and Safety Engineering,Wuhan Institute of Technology,Wuhan Hubei 430205,China;China Gezhouba Group No.1 Engineering Co.,Ltd.,Yichang Hubei 443000,China;School of Foreign Languages,Hubei Business College,Wuhan Hubei 430079,China)
出处
《中国安全科学学报》
CAS
CSCD
北大核心
2020年第5期149-155,共7页
China Safety Science Journal
基金
国家大学生创新创业训练计划项目(20191049706013)
国家自然科学基金资助(51504167)
高等学校博士学科点专项科研基金资助(20110143110017)
中央高校基本科研业务费资助项目(2017-YB-022)。
关键词
均布应力
梯度应力
应变型岩爆
气液复合
破坏特征
uniform stress
gradient stress
strain rockburst
gas-liquid compound
failure characteristics
