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Rock Mechanics Bulletin 2023年第3期2卷 1-14页

作者： Wenjie Xu Yingtao Hu Yunmin Chen Liangtong Zhan Ruiqi Chen Jinlong Li Duanyang Zhuang Qingdong Li Ke Li Center for hyper-gravity Experimental and Interdisciplinary Research Zhejiang UniversityHangzhou310058China MOE Key Laboratory of Soft Soils and Geoenvironmental Engineering Zhejiang UniversityHangzhou310058China Department of Civil Engineering Hangzhou City UniversityHangzhou310015China Key Laboratory of Safe Construction and Intelligent Maintenance for Urban Shield Tunnels of Zhejiang Province Hangzhou310015China Advanced Materials Additive Manufacturing Innovation Research Center Hangzhou City University310015China

hyper-gravity experiment enable the acceleration of the long-term transport of contaminants through fractured geological ***,the hyper-gravity effect of the solute transport in fractures are not well *** this study,the sealed control apparatus and the 3D printed fracture models were used to carry out 1 g and N g hyper-gravity *** results show that the breakthrough curves for the 1 g and N g experiments were almost the *** differences in the flow velocity and the fitted hydrodynamic dispersion coefficient were 0.97–3.12%and 9.09–20.4%,indicating that the internal fractures of the 3D printed fracture models remained stable under hyper-gravity,and the differences in the flow and solute transport characteristics were acceptable.A method for evaluating the long-term barrier performance of low-permeability fractured rocks was proposed based on the hyper-gravity *** solute transport processes in the 1 g prototype,1 g scaled model,and N g scaled model were simulated by the OpenGeoSys(OGS)*** results show that the N g scaled model can reproduce the flow and solute transport processes in the 1 g prototype without considering the micro-scale heterogeneity if the Reynolds number(Re)critical Reynolds number(Recr)and the Peclet number(Pe)the critical Peclet number(Pecr).This insight is valuable for carrying out hyper-gravity experiments to evaluate the long-term barrier performance of low-permeability fractured porous rock.

关键词： hyper-gravity effect Fractured rock 3D printed fracture Solute transport Long-term

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