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Analytical solution for determining wall closure associated with stope excavation underneath sill mat constructed by cemented backfill

文献类型：期刊论文

作者Fan, Chuan2,3,4; Li, Li3; Yang, Xiaocong2; Liu, Guangsheng2; Guo, Lijie2; Tang, Jing1
刊名JOURNAL OF ROCK MECHANICS AND GEOTECHNICAL ENGINEERING
出版日期2025-02-01
卷号17期号:2页码:983-995
关键词Underhand cut-and-fill mining Backfill Wall closure Analytical solution FLAC3D Flamant model
ISSN号1674-7755
DOI10.1016/j.jrmge.2024.04.002
通讯作者Yang, Xiaocong(yxcong@126.com) ; Liu, Guangsheng(liuguangsheng@bgrimm.com)
英文摘要In the underhand cut-and-fill mining method, a sill mat (i.e. an artificial horizontal pillar) constructed by cemented backfill is essential to prevent mine workers from being directly exposed under problematic rock roofs. A critical issue is to determine the minimum required strength of the sill mat to ensure a safe and cost-effective design. Until now, Mitchell's analytical solution is the only available option, considering two stiff and immobile rock walls. Unavoidable rock wall closure associated with stope excavation below the sill mat was neglected. This, along with other undefined parameters, explains why Mitchell's solution is rarely used in sill mat design. A new analytical solution for determining the minimum required strength of the sill mat accounting for wall closure is necessary. In this study, a closed-form analytical solution for estimating rock wall closure generated by stope excavation below a sill mat is developed by using Salamon's and Flamant's models. The proposed analytical solution does not contain any coefficients of correction or calibration. Despite several assumptions (or somewhat of oversimplifications) necessary to render a simple analytical solution possible, good agreements are obtained between the rock wall closures predicted by applying the proposed analytical solution and those obtained numerically with FLAC3D for many cases with arbitrarily chosen geometrical and material parameters. The proposed analytical solution is therefore validated and can be used to evaluate the rock wall closure generated by stope excavation below a sill mat. (c) 2025 Institute of Rock and Soil Mechanics, Chinese Academy of Sciences. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/ 4.0/).
WOS关键词STABILITY ; STRESSES
资助项目Young Scientist Project of the National Key Research and Development Program of China[2021YFC2900600] ; Beijing Nova Program[20220484057] ; Natural Sciences and Engineering Research Council of Canada[RGPIN-2018-06902]
WOS研究方向Engineering
语种英语
WOS记录号WOS:001429352000001
资助机构Young Scientist Project of the National Key Research and Development Program of China ; Beijing Nova Program ; Natural Sciences and Engineering Research Council of Canada
源URL[http://dspace.imech.ac.cn/handle/311007/100217]  
专题力学研究所_非线性力学国家重点实验室
通讯作者Yang, Xiaocong; Liu, Guangsheng
作者单位1.Chinese Acad Sci, State Key Lab Nonlinear Mech LNM, Inst Mech, Beijing 100190, Peoples R China
2.BGRIMM Technol Grp, Beijing 100160, Peoples R China
3.UQAT Polytech, Ecole Polytech Montreal, Res Inst Mines & Environm RIME, Dept Civil Geol & Min Engn, Montreal, PQ H3C 3A7, Canada
4.Univ Sci & Technol Beijing, Sch Civil & Resource Engn, Beijing 100083, Peoples R China
推荐引用方式
GB/T 7714		 Fan, Chuan,Li, Li,Yang, Xiaocong,et al. Analytical solution for determining wall closure associated with stope excavation underneath sill mat constructed by cemented backfill[J]. JOURNAL OF ROCK MECHANICS AND GEOTECHNICAL ENGINEERING,2025,17(2):983-995.
APA Fan, Chuan,Li, Li,Yang, Xiaocong,Liu, Guangsheng,Guo, Lijie,&Tang, Jing.(2025).Analytical solution for determining wall closure associated with stope excavation underneath sill mat constructed by cemented backfill.JOURNAL OF ROCK MECHANICS AND GEOTECHNICAL ENGINEERING,17(2),983-995.
MLA Fan, Chuan,et al."Analytical solution for determining wall closure associated with stope excavation underneath sill mat constructed by cemented backfill".JOURNAL OF ROCK MECHANICS AND GEOTECHNICAL ENGINEERING 17.2(2025):983-995.

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来源：力学研究所

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