Assessing the stability of high-level pillars in deeply-buried metal mines stabilized using cemented backfill
文献类型：期刊论文
| 作者 | Xia, Kaizong1,3; Chen, Congxin1,3; Liu, Xuanting1,3; Liu, Xiumin1,3; Yuan, Jiahao1,3; Dang, Shuang2 |
| 刊名 | INTERNATIONAL JOURNAL OF ROCK MECHANICS AND MINING SCIENCES
 |
| 出版日期 | 2023-10-01 |
| 卷号 | 170期号:-页码:- |
| ISSN号 | 1365-1609 |
| 关键词 | Deeply-buried metal mines Cementation backfill mining Strength of high-level pillars Average vertical stress Safety factor |
| 英文摘要 | Obtaining a reasonable assessment of the stability of high-level pillars stabilized using cemented backfill is particularly important when designing deeply-buried metal mines. This research determined the average vertical stress in high-level pillars in deeply-buried metal mines and also their strength when subjected to the confining pressure generated by cemented backfill. An expression was thus proposed for the stability of the cementedbackfill-stabilized high-level pillars in deeply-buried metal mines. The results show that the improved formula for estimating the strength of the high-level pillar gives a better reflection of the impact of on-site size and shape effects on the strength of the high-level pillars. The strength of a high-level pillar subject to on-site size effects was obtained by considering the compressive strength of the rock-mass of the pillar under confining pressure provided by the cemented backfill body in the deeply-buried mine. The shape effect was taken into account by considering that the ratio of the effective width to the height of the high-level pillar modifies its strength. At the same time, the concept of load transfer distance was introduced to determine the average vertical stress in the high-level pillar. This method effectively improves the tributary area method which overestimates the average vertical stress in the high-level pillar. When mining the ore body inside a pillar's zone of influence, the area of the orebody excavated should not exceed 0.80 (otherwise it will cause a significant increase in the average vertical axial stress in the high-level pillars). The new method proposed in this study allows the stability of high-level pillars stabilized using cemented backfill to be assessed when an insufficient amount of large-scale in situ testing has been conducted in a deeply-buried metal mine. It also provides a fast, economical, and reliable method for assessing the stability of mined-out areas in deeply-buried metal mines. |
| 学科主题 | Engineering ; Mining & Mineral Processing |
| 语种 | 英语 |
| 出版者 | PERGAMON-ELSEVIER SCIENCE LTD |
| WOS记录号 | WOS:001025049500001 |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/35104]  |
| 专题 | 中科院武汉岩土力学所 |
| 作者单位 | 1.State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan, Hubei, 430071, PR China 2.Guizhou Provincial Key Laboratory of Rock and Soil Mechanics and Engineering Safety, College of Civil Engineering, Guizhou University, Guiyang, 550025, Guizhou, PR China 3.University of Chinese Academy of Sciences, Beijing, 100049, PR China |
| 推荐引用方式 GB/T 7714 | Xia, Kaizong,Chen, Congxin,Liu, Xuanting,et al. Assessing the stability of high-level pillars in deeply-buried metal mines stabilized using cemented backfill[J]. INTERNATIONAL JOURNAL OF ROCK MECHANICS AND MINING SCIENCES,2023,170(-):-. |
| APA | Xia, Kaizong,Chen, Congxin,Liu, Xuanting,Liu, Xiumin,Yuan, Jiahao,&Dang, Shuang.(2023).Assessing the stability of high-level pillars in deeply-buried metal mines stabilized using cemented backfill.INTERNATIONAL JOURNAL OF ROCK MECHANICS AND MINING SCIENCES,170(-),-. |
| MLA | Xia, Kaizong,et al."Assessing the stability of high-level pillars in deeply-buried metal mines stabilized using cemented backfill".INTERNATIONAL JOURNAL OF ROCK MECHANICS AND MINING SCIENCES 170.-(2023):-. |
入库方式： OAI收割
来源：武汉岩土力学研究所
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