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Progress and prospects of mining with backfill in metal mines in China

International Journal of Minerals,Metallurgy and Materials 2023年第8期30卷 1455-1473页

作者： Gaili Xue Erol Yilmaz Yongding Wang College of mining Technology Taiyuan University of TechnologyTaiyuan030024China Research Center of Green mining Engineering Technology in Shanxi Province Taiyuan030024China Department of Civil Engineering Geotechnical DivisionRecep Tayyip Erdogan UniversityFenerRizeTR53100Turkey Longshou Mine Jinchuan Group Co.Ltd.Jinchuan737100China

mining is the foundation of modern industrial development.In the context of the“carbon peaking and carbon neutrality”era,countries have put forward the development strategy of“adhering to the harmonious coexistence of humans and nature.”The ongoing progress and improvement of filling mining technology have provided significant advantages,such as“green mining,safe,efficient,and low-carbon emission,”which is crucial to the comprehensive utilization of mining solid waste,environmental protection,and safety of re-mining.This review paper describes the development history of metal mine filling mining in China and the characteristics of each stage.The excitation mechanism and current research status of producing cementitious materials from blast furnace slag and other industrial wastes are then presented,and the concept of developing cementitious materials for backfill based on the whole solid waste is proposed.The advances in the mechanical characteristics of cemented backfill are elaborated on four typical levels:static mechanics,dynamic mechanics,mechanical influencing factors,and multi-scale mechanics.The working/rheological characteristics of the filling slurry are presented,given the importance of the filling materials conveying process.Finally,the future perspectives of mining with backfill are discussed based on the features of modern filling concepts to provide the necessary theoretical research value for filling mining.

关键词： mining with backfill cementitious materials mechanical characteristics slurry properties future perspectives

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Innovative backfilling longwall panel layout for better subsidence control effect-separating adjacent subcritical panels with pillars

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International Journal of Coal Science & Technology 2014年第3期1卷 297-305页

作者： Jialin Xu Dayang Xuan Changchun He State Key Laboratory of Coal Resources and Safe mining China University of Mining and TechnologyXuzhou 221116China School of Mines China University of Mining and TechnologyXuzhou 221116China

In recent years,field trials of non-pillar longwall mining using complete backfill have been implemented successively in the Chinese coal mining industry.The objective of this paper is to get a scientific understanding of surface subsidence control effect using such techniques.It begins with a brief overview on complete backfill methods primarily used in China,followed by an analysis of collected subsidence factors under mining with complete backfill.It is concluded that non-pillar longwall panel layout cannot protect surface structures against damages at a relatively large mining height,even though complete backfill is conducted.In such cases,separated longwall panel layout should be applied,i.e.,panel width should be subcritical and stable coal pillars should be left between the adjacent panels.The proposed method takes the principles of subcritical extraction and partial extraction;in conjunction with gob backfilling,surface subsidence can be effectively mitigated,thus protecting surface buildings against mining-induced damage.A general design principle and method of separated panel layout have also been proposed.

关键词： mining with backfill Longwall mining Surface subsidence control Suberitical panel width Separatedpillar

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