典型文献
Mechanical behaviours of sandstone containing intersecting fissures under uniaxial compression
文献摘要：
Predicting rock cracking is important for assessing the stability of underground engineering.The effects of the intersecting angle α and the distribution orientation angle β of intersecting fissures on the uniaxial compressive strength and the failure characteristics of sandstone containing intersecting fissures are investigated through laboratory experiments and two-dimensional particle flow code(PFC2D).The relationship between the mechanical properties of sandstone and the intersecting angle α and the dis-tribution orientation angle β is analysed.Crack initiation forms and the final failure modes are then categorised and determined via empirical methods.In addition,the cracking processes of intersecting fissures with different α and β values are discussed.The results show that variations in the peak stress,peak strain,average modulus,and crack initiation stress of sandstone containing intersecting fissures show a"moth"shape in the space of the α-β-mechanical parameters.Two crack initiation forms are identified:inner tip cracking(usually accompanied by one outer tip cracking)and only outer tips cracking.Two failure modes are observed:(1)the main fracture planes are created at the inner tip and one outer tip,and(2)the main fracture planes are formed at the two outer tips.Two main crack evo-lution processes of sandstone containing intersecting fissures under uniaxial compression are found.Approaches for quickly determining the crack initiation form and the failure mode are proposed.The combination of the determination equations for the crack initiation form and the failure mode can be used to predict the crack evolution.The approach for determining the crack evolution processes is hence proposed with acceptable precision.
文献关键词：
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作者姓名：
Fei Xiong;Xinrong Liu;Xiaohan Zhou;Guangyi Lin;Dongshuang Liu;Yafeng Han;Bin Xu;Chunmei He;Zijuan Wang
作者机构：
School of Civil Engineering,Chongqing University,Chongqing,400045,China;State Key Laboratory of Coal Mine Disaster Dynamics and Control,Chongqing University,Chongqing,400044,China;National Joint Engineering Research Center of Geohazards Prevention in the Reservoir Areas,Chongqing University,Chongqing,400045,China;State Key Laboratory for Geomechanics and Deep Underground Engineering,China University of Mining and Technology,Xuzhou,221116,China;College of Architectural Engineering,Neijiang Normal University,Neijiang,641100,China;School of Management Science and Engineering,Chongqing Technology and Business University,Chongqing,400067,China
文献出处：
引用格式：
[1]Fei Xiong;Xinrong Liu;Xiaohan Zhou;Guangyi Lin;Dongshuang Liu;Yafeng Han;Bin Xu;Chunmei He;Zijuan Wang-.Mechanical behaviours of sandstone containing intersecting fissures under uniaxial compression)[J].岩石力学与岩土工程学报（英文版）,2022(02):460-476
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Mechanical,behaviours,sandstone,containing,intersecting,fissures,uniaxial,compression,Predicting,rock,cracking,important,assessing,stability,underground,engineering,effects,angle,distribution,orientation,compressive,strength,failure,characteristics,are,investigated,through,laboratory,experiments,two,dimensional,particle,flow,code,PFC2D,relationship,between,mechanical,properties,analysed,Crack,initiation,forms,final,modes,then,categorised,determined,via,empirical,methods,In,addition,processes,different,values,discussed,results,show,that,variations,peak,stress,strain,average,modulus,moth,shape,space,parameters,Two,identified,inner,usually,accompanied,by,outer,only,tips,observed,main,fracture,planes,created,formed,found,Approaches,quickly,determining,proposed,combination,determination,equations,can,used,predict,evolution,approach,hence,acceptable,precision
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0.429521
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