Stability Analysis of the Backfill Roof with Basket Weave Drift Layout in Underhand Drift-and-Fill Mining
Source abstract
Abstract
The stability of a backfill roof is critical to ensure safe production in underhand drift-and-fill mining. In this method, the basket weave drift layout is widely accepted. However, there is currently limited research on the displacement distribution and strength requirement of the backfill roof with this drift layout. To address the gap, a three-dimensional numerical model was established with FLAC3D, with the Maoping Lead–Zinc Mine as the engineering background, to investigate the stability of a backfill roof with the basket weave drift layout. In numerical simulations, an iterative search method was applied to determine the strength requirements of the backfill roof. The results show that the displacement of the backfill roof with the basket weave drift layout shows columnar or strip-like distribution patterns. The strength requirements (unconfined compressive strength) of the backfill roof in limited equilibrium for drift sizes of 3.5 m × 3.0 m, 4.5 m × 4.0 m, and 5.5 m × 5.0 m were determined to be 1.34 MPa, 1.57 MPa, and 2.38 MPa, respectively. A comparison was also made between the strength requirement predicted by traditional analytical solutions and those obtained from numerical simulations, which shows that traditional solutions tend to yield conservative results. The method and analysis process employed in this study can provide valuable references for backfill strength design in mines using underhand drift-and-fill mining.
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Research context
OpenAlex topics: Tailings Management and Properties · Geomechanics and Mining Engineering · Rock Mechanics and Modeling
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
School of Civil and Resource Engineering, University of Science and Technology Beijing, Beijing 100083, China
BGRIMM Technology Group, Beijing 100160, China
National Centre for International Research on Green Metal Mining, Beijing 100160, China
Funding
National Science and Technology Major Project · Beijing Nova Program
References (36)
Show source-provided references
1. Darling, P. (2011). SME Mining Engineering Handbook, Society for Mining, Metallurgy, and Exploration, Inc.. [3rd ed.].
2. Hustrulid, W.A., and Bullock, R.L. (2001). Underground Mining Methods: Engineering Fundamentals and International Case Studies, Society for Mining, Metallurgy, and Exploration, Inc.
3. Laboratory characterization of cemented rock fill for underhand cut and fill method of mining10.1007/s40033-015-0088-2 ↗
4. Stability calculation of backfill roof in downward roadway under multifactor influence
5. Strength model and its application of downward drift filling roof based on thick plate theory
6. Williams, T.J., Brady, T.M., Bayer, D.C., Bren, M.J., Pakalnis, R.C., Marjerison, J.A., and Langston, R.B. (May, January 29). Underhand cut and fill mining as practiced in three deep hard rock mines in the United States. Proceedings of the 109th Canadian Institute of Mining Annual General Meeting, Montreal, QC, Canada.
7. Interface shear behavior of cementing underground mine backfill10.1061/(ASCE)GM.1943-5622.0001852 ↗
8. Lu, X. (2022). Research on Optimization of Stoping Drifts Parameters by Downward Cemented Filling Method in Jinchuan No. 2 Mining Area. [Master’s Thesis, Wuhan University of Science and Technology].
9. Application of downward horizontal layered drift cementing andfilling mining method in Maoping lead zine mine
10. Stability analysis of full tailing paste filling roof in Wushan Copper Mine
11. Required strength estimation of a cemented backfill with the front wall exposed and back wall pressured10.1504/IJMME.2018.091214 ↗
12. Stability analyses of side-exposed backfill considering mine depth and extraction of adjacent stope10.1016/j.ijrmms.2021.104735 ↗
13. Ma, Q., Liu, G., Yang, X., Guo, L., and Andy, F. (2025). Stability of base-exposed backfill roof considering interfaces between adjacent drifts in underhand drift-and-fill mining. J. Rock Mech. Geotech. Eng., accepted.
14. Analytical solution for estimating the minimum required strength of sill mat by considering failure due to rock wall closure10.1016/j.jrmge.2024.03.015 ↗
15. Zhao, K., Liang, N., Zeng, P., Wang, W., Gong, C., Xiong, L., and Liu, H. (2023). Research on optimization and numerical simulation of layout scheme of mining approach in downward slicing and filling method. Appl. Sci., 13.10.20944/preprints202306.0236.v1 ↗
16. Investigation on fracture characteristics and failure pattern of inclined layered cemented tailings backfill10.1016/j.conbuildmat.2022.128110 ↗
17. Study on stability of inclined layered cemented backfill in downward drift
18. Itasca (2019). FLAC3D-Fast Lagrangian Analysis of Continua, User’s Guide, Itasca Consulting Group.
19. Stability analyses of vertically exposed cemented backfill: A revisit to Mitchell’s physical model tests10.1016/j.ijmst.2016.09.024 ↗
20. Guo, L., Peng, X., Zhao, Y., Liu, G., Tang, G., and Pan, A. (2022). Experimental study on direct tensile properties of cemented paste backfill. Front. Mater., 9.10.3389/fmats.2022.864264 ↗
21. Cemented paste backfill (CPB) material properties for undercut analysis10.3390/mining2010007 ↗
22. Numerical analysis of the stability of arched sill mats made of cemented backfill10.1016/j.ijrmms.2021.104667 ↗
23. Numerical investigation of the stability of a base-exposed sill mat made of cemented backfill10.1016/j.ijmecsci.2019.05.046 ↗
24. Study of deep-mine ore rock failure mechanism using downward approachfilling mining method by numerical simulation
25. Numerical simulation of approach rock stability under interlocking vertical mining of adjacent layered approaches
26. Caceres, C.A. (2005). Effect of Delayed Backfill on Open Stope Mining Methods. [Master’s Thesis, The University of British Columbia].
27. Lin, H., Yang, Y., Chen, C., and Ding, C. (2024). Influence of mining sequence of branch on stope pressure behaviour on continuous mining and continuous backfilling. Processes, 12.10.3390/pr12030442 ↗
28. Evaluation of flexural failure of sill mats using classical beam theory and numerical models10.1016/j.ijrmms.2017.09.002 ↗
29. Han, B. (2004). Reliability Analysis of Filling Body in Jinchuan No.2 Mining Area and Optimization of Mining Ground Pressure Control in 1 # Ore Body. [Ph.D. Thesis, Central South University].
30. Sill mat evaluation using centrifuge models
31. Discussion on the mechanics model of underhand drift-and-fill mining
32. Hu, Y., Han, B., Zhang, B., and Li, K. (2023). Force analysis and strength determination of the cemented paste backfill roof in underhand drift cut-and-fill stopping. Appl. Sci., 13.10.3390/app13020855 ↗
33. Analytical solution for determining wall closure associated with stope excavation underneath sill mat constructed by cemented backfill10.1016/j.jrmge.2024.04.002 ↗
34. Dong, L., Zhang, Y., Chen, Z., Kou, Y., and Pei, Z. (2024). Dynamic stress characterization and instability risk identification using multisource acoustic signals in cut-and-fill stopes. Sci. Rep., 14.10.1038/s41598-024-66445-8 ↗
35. Hao, J., Chen, A., Li, X., Bian, H., Shi, Y., Wang, X., Zhao, J., and Liu, H. (2022). A case study of pillar extraction techniques based on strip-filling and second-mining method. Front. Earth Sci., 10.10.3389/feart.2022.1051245 ↗
36. Mechanical properties and deformation mechanism of stratified cemented tailings backfill under unconfined compression10.1016/j.conbuildmat.2022.127205 ↗