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Experimental study on the flow behaviour of water-sand mixtures in fractured rock specimens

查看全文 作　　者：Boyang [1]Zhang;Qingyuan [2,3]He;Zhibin [1]Lin;Zhenhua [1]Li 高影响力作者 机构地区：[1]School of Civil Engineering,Henan Polytechnic University,Jiaozuo 454000,China;[2]State Key Laboratory of Coal Resources and Safe Mining,School of Mines,China University of Mining and Technology,Xuzhou 221116,China;[3]School of Minerals and Energy Resources Engineering,UNSW Sydney,Sydney,NSW 2052,Australia高影响力机构 出　　处：《International Journal of Mining Science and Technology》索引2021年第31卷第3期,共9页高影响力期刊 基　　金：financially supported by the National Natural Science Foundation of China(Nos.41807209,51778215,51708185,and 51974293);the Young Teacher Foundation of HPU(No.2019XQG-19);the Henan Provincial Youth Talent Promotion Program(No.2020HYTP003);the Jiangsu Province Science Foundation for Youths(No.BK20180658);the Doctor Foundation of Henan Polytechnic University(Nos.B2017-51 and B2017-53);China Postdoctoral Science Foundation(No.2018M632422)。 摘　　要：The study of flow behaviour of water-sand mixtures in fractured rocks is of great necessity to understand the producing mechanism and prevention of water inrush and sand gushing accidents.A self-developed seepage test system is used in this paper to conduct laboratory experiments in order to study the influence of the particle size distribution,the void ratio,and the initial mass of Aeolian sand on the flow behavior.It is concluded that the water flow velocity is insensitive to the initial mass of the Aeolian sand but increases with the power exponent in the Talbot formula and the specimen height.The outflow of the Aeolian sand increases with the power exponent in the Talbot formula,the specimen height,and the initial mass of the Aeolian sand.Besides,the outflow of the Aeolian sand changes exponentially with the water flow velocity.Finally,it is found that the fractured specimen has a maximum sand filtration capacity beyond which the outflow of the Aeolian sand significantly increases with the initial mass of the Aeolian sand. 关 键 词：Water inrush and sand gushing accidents Seepage flow of water-sand mixtures Fractured specimens Sand filtration capacity
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