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Volume 13
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10.3390/min13121556
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Article

Study on Aeolian Sand-Box Backfill Geomechanical Characteristics and Overlying Strata Control Effects

by
Bo Zhao
1,2,
Zhiyi Zhang
1,2,*,
Xiaoping Gong
1,2,
Wei Wang
1,2,
Xiaoyong Tong
3,
Hui Chen
1,2,
Weiming Guan
1,2,
Xin Li
1,2,
Shuo Feng
1,2,
Dezhi Yang
4,
Lubo Huang
4 and
Yuhang Zhao
1
1
School of Geology and Mining Engineering, Xinjiang University, Urumqi 830046, China
2
Collaborative Innovation Center of Green Mining and Ecological Restoration for Xinjiang Mineral Resources, Urumqi 830046, China
3
The First Hydrology Engineering Geological Brigade of Xinjiang Bureau of Geology and Mineral Resources, Urumqi 830046, China
4
No. 156 Coalfield Geological Exploration Team, Xinjiang Uygur Autonomous Region Coalfield Geological Bureau, Urumqi 830046, China
*
Author to whom correspondence should be addressed.
Minerals 2023, 13(12), 1556; https://doi.org/10.3390/min13121556
Submission received: 22 October 2023 / Revised: 14 December 2023 / Accepted: 15 December 2023 / Published: 18 December 2023
(This article belongs to the Special Issue Backfilling Materials for Underground Mining, Volume III)
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Abstract

The aeolian sand-box backfilling method proves effective for environmentally friendly coal extraction in northwestern regions, including Xinjiang. This study investigated the geomechanical characteristics of aeolian sand-box backfill material and its control effects on overlying strata through indoor experiments, mechanical analysis, and numerical simulations. Uniaxial compression tests on models with varying mesh sizes, wire diameters, and dimensions revealed that larger mesh sizes and wire diameters increased the bearing capacity of the aeolian sand-box backfill material, while increasing dimensions had the opposite effect. A mechanical analysis of the metal mesh box deformation produced equations describing its restraining force. Subsequent experiments and simulations on models of different dimensions consistently demonstrated the material’s mechanical properties, with stress-displacement curves closely aligned. 3DEC5.2 software simulations highlighted the effectiveness of aeolian sand-box backfill material in controlling displacement and stress variations in goaf areas. Notably, smaller-sized backfill material exhibited a more pronounced impact on controlling overlying strata displacement and stress development.
Keywords: aeolian sand-box backfill material; uniaxial compression test; numerical simulation; backfill mining aeolian sand-box backfill material; uniaxial compression test; numerical simulation; backfill mining

Share and Cite

MDPI and ACS Style

Zhao, B.; Zhang, Z.; Gong, X.; Wang, W.; Tong, X.; Chen, H.; Guan, W.; Li, X.; Feng, S.; Yang, D.; et al. Study on Aeolian Sand-Box Backfill Geomechanical Characteristics and Overlying Strata Control Effects. Minerals 2023, 13, 1556. https://doi.org/10.3390/min13121556

AMA Style

Zhao B, Zhang Z, Gong X, Wang W, Tong X, Chen H, Guan W, Li X, Feng S, Yang D, et al. Study on Aeolian Sand-Box Backfill Geomechanical Characteristics and Overlying Strata Control Effects. Minerals. 2023; 13(12):1556. https://doi.org/10.3390/min13121556

Chicago/Turabian Style

Zhao, Bo, Zhiyi Zhang, Xiaoping Gong, Wei Wang, Xiaoyong Tong, Hui Chen, Weiming Guan, Xin Li, Shuo Feng, Dezhi Yang, and et al. 2023. "Study on Aeolian Sand-Box Backfill Geomechanical Characteristics and Overlying Strata Control Effects" Minerals 13, no. 12: 1556. https://doi.org/10.3390/min13121556

APA Style

Zhao, B., Zhang, Z., Gong, X., Wang, W., Tong, X., Chen, H., Guan, W., Li, X., Feng, S., Yang, D., Huang, L., & Zhao, Y. (2023). Study on Aeolian Sand-Box Backfill Geomechanical Characteristics and Overlying Strata Control Effects. Minerals, 13(12), 1556. https://doi.org/10.3390/min13121556

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