典型文献
Analytical study of subcritical crack growth under mode I loading to estimate the roof durability in underground excavation
文献摘要：
The long-term stability of the roof is particularly important in designing underground rock structures.To estimate the durability of roof strata in underground excavation,a computation scheme of subcritical crack growth is proposed in this study.By adopting the proposed method,the potential collapse location of strata is derivable in accordance with a static model,the durability of roof strata can be estimated,a dynamic time step control strategy is achieved to balance the accuracy and speed of computing,and the initial crack size of rock can be estimated.In addition to the above,a mechanical model of underground excavation with non-uniformly distributed loads and partially yielded foundation is presented as the pro-totypical case.A set of case studies is carried out that showcase a power correlation between applied stress and roof durability.The allowable applied tensile stress for a 100-year life cycle is about 76％of the tensile strength.By using the proposed subcritical crack growth computation scheme,the roof stabil-ity in an underground excavation can be identified not only from the spatial view but also from the tem-poral perspective.
文献关键词：
中图分类号：
作者姓名：
Songtao Ji;Zeng Wang;Jurij Karlov?ek
作者机构：
Geotechnical Engineering Centre,School of Civil Engineering,The University of Queensland,Brisbane 4067,Australia;China Coal Technology&Engineering Group Nanjing Design&Research Institute Co.,Ltd.,Nanjing 210031,China
文献出处：
引用格式：
[1]Songtao Ji;Zeng Wang;Jurij Karlov?ek-.Analytical study of subcritical crack growth under mode I loading to estimate the roof durability in underground excavation)[J].矿业科学技术学报（英文版）,2022(02):375-385
A类：
derivable,totypical
B类：
Analytical,study,subcritical,crack,growth,loading,roof,durability,underground,excavation,long,term,stability,particularly,important,designing,rock,structures,To,strata,computation,scheme,proposed,this,By,adopting,method,potential,collapse,location,accordance,static,model,can,estimated,dynamic,step,control,strategy,achieved,balance,accuracy,speed,computing,initial,size,In,addition,above,mechanical,uniformly,distributed,loads,partially,yielded,foundation,presented,set,studies,carried,that,showcase,power,correlation,between,applied,stress,allowable,tensile,year,life,cycle,about,strength,using,identified,not,only,from,spatial,view,also,tem,poral,perspective
AB值：
0.477408
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