Stability analysis of the false roof made of cemented tailings backfill in deep mine: A case study
The overall stability of cemented tailings backfill (CTB) false roof, as an important support structure in the quarry, is of great significance for realizing the safe recovery of the ore body. This paper aims at the practical problem of ore body mining under the condition of deep broken rock mass. B...
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| Language: | English |
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Elsevier
2024-12-01
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| Series: | Case Studies in Construction Materials |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2214509524011987 |
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| author | Gang Xu Xingping Lai Pengfei Shan Jianning Liu Huicong Xu Hao Wang |
| author_facet | Gang Xu Xingping Lai Pengfei Shan Jianning Liu Huicong Xu Hao Wang |
| author_sort | Gang Xu |
| collection | DOAJ |
| description | The overall stability of cemented tailings backfill (CTB) false roof, as an important support structure in the quarry, is of great significance for realizing the safe recovery of the ore body. This paper aims at the practical problem of ore body mining under the condition of deep broken rock mass. By analyzing the typical process characteristics of underhand cut-and-fill mining method, the dangerous mechanical state of CTB false roof is determined, and the CTB false roof strength model based on the maximum tensile stress failure criterion and deep mining coefficient is established. Based on the measured load value of CTB false roof, the minimum required strength of CTB false roof is obtained. Through the performance tests of CTB under different proportioning schemes, the mechanical strength of CTB false roof (UTS：0.43 MPa, UCS：6.22 MPa) is designed，the proportioning parameters of CTB with ''high strength, high fluidity, quick setting and low cost'' are put forward. Finally, based on FLAC3D numerical simulation and field monitoring, the stability of CTB false roof with recommended ratio parameters is analyzed. The results show that the CTB false roof has not been violently displaced and destabilized in the process of service ore body mining, has good strength reserve, and is able to provide a safe workspace for mining, verifies the reliability and reasonableness of the CTB false roof proportioning parameter, and provides a new way for the study of false roof stability. |
| format | Article |
| id | doaj-art-8e424728fadb420cb5c0fa33e6f97cd4 |
| institution | OA Journals |
| issn | 2214-5095 |
| language | English |
| publishDate | 2024-12-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Case Studies in Construction Materials |
| spelling | doaj-art-8e424728fadb420cb5c0fa33e6f97cd42025-08-20T02:38:29ZengElsevierCase Studies in Construction Materials2214-50952024-12-0121e0404610.1016/j.cscm.2024.e04046Stability analysis of the false roof made of cemented tailings backfill in deep mine: A case studyGang Xu0Xingping Lai1Pengfei Shan2Jianning Liu3Huicong Xu4Hao Wang5College of Energy Science and Engineering, Xi‘an University of Science and Technology, Xi'an, Shanxi, 710054, ChinaCollege of Energy Science and Engineering, Xi‘an University of Science and Technology, Xi'an, Shanxi, 710054, China; Key Laboratory of Western Mine Exploration and Hazard Preven-tion, Ministry of Education, Xi‘an University of Science and Technology, Xi'an, Shanxi, 710054, ChinaCollege of Energy Science and Engineering, Xi‘an University of Science and Technology, Xi'an, Shanxi, 710054, China; Key Laboratory of Western Mine Exploration and Hazard Preven-tion, Ministry of Education, Xi‘an University of Science and Technology, Xi'an, Shanxi, 710054, ChinaState Key Laboratory for Tunnel Engineering, China University of Mining & Technology - Beijing, Beijing, 100083, China; Corresponding authors.College of Energy Science and Engineering, Xi‘an University of Science and Technology, Xi'an, Shanxi, 710054, China; Corresponding authors.College of Energy Science and Engineering, Xi‘an University of Science and Technology, Xi'an, Shanxi, 710054, ChinaThe overall stability of cemented tailings backfill (CTB) false roof, as an important support structure in the quarry, is of great significance for realizing the safe recovery of the ore body. This paper aims at the practical problem of ore body mining under the condition of deep broken rock mass. By analyzing the typical process characteristics of underhand cut-and-fill mining method, the dangerous mechanical state of CTB false roof is determined, and the CTB false roof strength model based on the maximum tensile stress failure criterion and deep mining coefficient is established. Based on the measured load value of CTB false roof, the minimum required strength of CTB false roof is obtained. Through the performance tests of CTB under different proportioning schemes, the mechanical strength of CTB false roof (UTS：0.43 MPa, UCS：6.22 MPa) is designed，the proportioning parameters of CTB with ''high strength, high fluidity, quick setting and low cost'' are put forward. Finally, based on FLAC3D numerical simulation and field monitoring, the stability of CTB false roof with recommended ratio parameters is analyzed. The results show that the CTB false roof has not been violently displaced and destabilized in the process of service ore body mining, has good strength reserve, and is able to provide a safe workspace for mining, verifies the reliability and reasonableness of the CTB false roof proportioning parameter, and provides a new way for the study of false roof stability.http://www.sciencedirect.com/science/article/pii/S2214509524011987Deep miningCemented tailings backfill false roofThick plate theoryPerformance trialNumerical simulationStability |
| spellingShingle | Gang Xu Xingping Lai Pengfei Shan Jianning Liu Huicong Xu Hao Wang Stability analysis of the false roof made of cemented tailings backfill in deep mine: A case study Case Studies in Construction Materials Deep mining Cemented tailings backfill false roof Thick plate theory Performance trial Numerical simulation Stability |
| title | Stability analysis of the false roof made of cemented tailings backfill in deep mine: A case study |
| title_full | Stability analysis of the false roof made of cemented tailings backfill in deep mine: A case study |
| title_fullStr | Stability analysis of the false roof made of cemented tailings backfill in deep mine: A case study |
| title_full_unstemmed | Stability analysis of the false roof made of cemented tailings backfill in deep mine: A case study |
| title_short | Stability analysis of the false roof made of cemented tailings backfill in deep mine: A case study |
| title_sort | stability analysis of the false roof made of cemented tailings backfill in deep mine a case study |
| topic | Deep mining Cemented tailings backfill false roof Thick plate theory Performance trial Numerical simulation Stability |
| url | http://www.sciencedirect.com/science/article/pii/S2214509524011987 |
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