Estimating shear strength of high-level pillars supported with cemented backfilling using the Hoek-Brown strength criterion
文献类型：期刊论文
| 作者 | Xia, Kaizong1,2; Chen, Congxin1,2; Liu, Xiumin1,2; Wang, Yue1,2; Liu, Xuanting1,2; Yuan, Jiahao1,2 |
| 刊名 | JOURNAL OF ROCK MECHANICS AND GEOTECHNICAL ENGINEERING
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| 出版日期 | 2024-02-01 |
| 卷号 | 16期号:2页码:454-469 |
| 关键词 | Deep metal mines High-level pillars Hoek-Brown strength criterion Cemented backfilling Confining pressure Shear strength |
| ISSN号 | 1674-7755 |
| DOI | 10.1016/j.jrmge.2023.06.004 |
| 英文摘要 | Deep metal mines are often mined using the high-level pillars with subsequent cementation backfilling (HLSCB) mining method. At the design stage, it is therefore important to have a reasonable method for determining the shear strength of the high-level pillars (i.e. cohesion and internal friction angle) when they are supported by cemented backfilling. In this study, a formula was derived for the upper limit of the confining pressure s3max on a high-level pillar supported by cemented backfilling in a deep metal mine. A new method of estimating the shear strength of such pillars was then proposed based on the Hoek -Brown failure criterion. Our analysis indicates that the horizontal stress shh acting on the cemented backfill pillar can be simplified by expressing it as a constant value. A reasonable and effective value for s3max can then be determined. The value of s3max predicted using the proposed method is generally less than 3 MPa. Within this range, the shear strength of the high-level pillar is accurately calculated using the equivalent Mohr-Coulomb theory. The proposed method can effectively avoid the calculation of inaccurate shear strength values for the high-level pillars when the original Hoek-Brown criterion is used in the presence of large confining pressures, i.e. the situation in which the cohesion value is too large and the friction angle is too small can effectively be avoided. The proposed method is applied to a deep metal mine in China that is being excavated using the HLSCB method. The shear strength parameters of the high-level pillars obtained using the proposed method were input in the numerical simulations. The numerical results show that the recommended level heights and sizes of the high-level pillars and rooms in the mine are rational. (c) 2024 Institute of Rock and Soil Mechanics, Chinese Academy of Sciences. Production and hosting 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/). |
| 资助项目 | General Program and Youth Fund Program of the National Natural Science Foundation of China[42377175] ; General Program and Youth Fund Program of the National Natural Science Foundation of China[42002292] |
| WOS研究方向 | Engineering |
| 语种 | 英语 |
| WOS记录号 | WOS:001234768700001 |
| 出版者 | SCIENCE PRESS |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/41477]  |
| 专题 | 中科院武汉岩土力学所 |
| 通讯作者 | Xia, Kaizong |
| 作者单位 | 1.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 2.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Peoples R China |
| 推荐引用方式 GB/T 7714 | Xia, Kaizong,Chen, Congxin,Liu, Xiumin,et al. Estimating shear strength of high-level pillars supported with cemented backfilling using the Hoek-Brown strength criterion[J]. JOURNAL OF ROCK MECHANICS AND GEOTECHNICAL ENGINEERING,2024,16(2):454-469. |
| APA | Xia, Kaizong,Chen, Congxin,Liu, Xiumin,Wang, Yue,Liu, Xuanting,&Yuan, Jiahao.(2024).Estimating shear strength of high-level pillars supported with cemented backfilling using the Hoek-Brown strength criterion.JOURNAL OF ROCK MECHANICS AND GEOTECHNICAL ENGINEERING,16(2),454-469. |
| MLA | Xia, Kaizong,et al."Estimating shear strength of high-level pillars supported with cemented backfilling using the Hoek-Brown strength criterion".JOURNAL OF ROCK MECHANICS AND GEOTECHNICAL ENGINEERING 16.2(2024):454-469. |
入库方式： OAI收割
来源：武汉岩土力学研究所
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