Experimental study on spatial evolution of mode-I and mode-II fracture toughness of cemented paste backfill under external sulphate attack

IF 2.7 3区工程技术 Q3 ENVIRONMENTAL SCIENCES

International Journal of Mining Reclamation and Environment Pub Date : 2023-09-14 DOI:10.1080/17480930.2023.2258744

Xinyuan Li, Liang Cui

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引用次数: 0

Abstract

ABSTRACTExternal sulphate attack (ESA) interferes with spatial changes in fracture toughness of cemented paste backfill (CPB) and affects its mechanical stability. Large-scale curing column models are developed to investigate the spatial evolution of mode-I and mode-II fracture toughness (i.e. KIC and KIIC) under seepage- and diffusion-induced ESA. It has been found that the seepage-induced ESA leads to spatial changes in KIC and KIIC of CPB at advanced ages and higher extent of degradation of fracture toughness is measured at a deeper position in CPB. Comparatively, KIc can be used as a reliable quantity to estimate KIIc under the diffusion-induced ESA.KEYWORDS: Cemented paste backfillexternal sulphate attackfracture toughnessheterogeneity AcknowledgmentsThe authors would like to thank the Natural Sciences and Engineering Research Council of Canada (NSERC) and the Lakehead University for their financial support.Disclosure statementNo potential conflict of interest was reported by the author(s).Additional informationFundingThis work was supported by the Natural Sciences and Engineering Research Council of Canada under Grant NSERC RGPIN-2019-05078.

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外硫酸盐侵蚀下胶结膏体充填体ⅰ、ⅱ型断裂韧性空间演化试验研究

外部硫酸盐侵蚀(ESA)干扰了胶结膏体充填体(CPB)断裂韧性的空间变化，影响其力学稳定性。建立了大型养护柱模型，研究了渗流和扩散诱导下ⅰ型和ⅱ型断裂韧性(即KIC和KIIC)的空间演化规律。研究发现，渗流诱发的ESA导致CPB的KIC和KIIC的空间变化，且CPB中较深位置的断裂韧性退化程度较高。相比之下，KIc可以作为估计扩散诱导ESA下KIIc的可靠量。作者在此感谢加拿大自然科学与工程研究委员会(NSERC)和湖首大学的财政支持。披露声明作者未报告潜在的利益冲突。本研究由加拿大自然科学与工程研究委员会资助，NSERC RGPIN-2019-05078。

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来源期刊

International Journal of Mining Reclamation and Environment ENVIRONMENTAL SCIENCES-MINING & MINERAL PROCESSING

CiteScore

5.70

自引率

8.30%

发文量

审稿时长

>12 weeks

期刊介绍： The International Journal of Mining, Reclamation and Environment published research on mining and environmental technology engineering relating to metalliferous deposits, coal, oil sands, and industrial minerals. We welcome environmental mining research papers that explore: -Mining environmental impact assessment and permitting- Mining and processing technologies- Mining waste management and waste minimization practices in mining- Mine site closure- Mining decommissioning and reclamation- Acid mine drainage. The International Journal of Mining, Reclamation and Environment welcomes mining research papers that explore: -Design of surface and underground mines (economics, geotechnical, production scheduling, ventilation)- Mine planning and optimization- Mining geostatics- Mine drilling and blasting technologies- Mining material handling systems- Mine equipment