3D打印菱形聚合物厚度对尾砂充填聚合物抗弯性能和微观结构影响机制

赵紫月; 曹帅; Erol Yilmaz

doi:10.1007/s12613-022-2557-6

Volume 30 Issue 2

Feb. 2023

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文章导航 > 矿物冶金与材料学报（英文） > 2023 > 30(2): 236-249

Ziyue Zhao, Shuai Cao, and Erol Yilmaz, Effect of layer thickness on the flexural property and microstructure of 3D-printed rhomboid polymer-reinforced cemented tailing composites, Int. J. Miner. Metall. Mater., 30(2023), No. 2, pp. 236-249. https://doi.org/10.1007/s12613-022-2557-6

Cite this article as:

Ziyue Zhao, Shuai Cao, and Erol Yilmaz, Effect of layer thickness on the flexural property and microstructure of 3D-printed rhomboid polymer-reinforced cemented tailing composites, Int. J. Miner. Metall. Mater., 30(2023), No. 2, pp. 236-249. https://doi.org/10.1007/s12613-022-2557-6

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研究论文

3D打印菱形聚合物厚度对尾砂充填聚合物抗弯性能和微观结构影响机制

1)
北京科技大学金属矿山高效开采与安全教育部重点实验室, 北京 100083, 中国
2)
北京科技大学土木与资源工程学院, 北京 100083, 中国
3)
Department of Civil Engineering, Geotechnical Division, Recep Tayyip Erdoğan University, Fener, Rize TR53100, Turkey

通讯作者:
曹帅 E-mail: sandy_cao@ustb.edu.cn

Erol Yilmaz E-mail: erol.yilmaz@erdogan.edu.tr

文章亮点

(1) 扩展了新型3D打印技术在尾砂胶结充填体力学体系的应用范围。

(2) 基于DIC技术揭示了3D打印菱形聚合物对尾砂充填聚合物力学特性的影响机制。

(3) 3D打印菱形聚合物显著增强了尾砂充填聚合物的挠度。

中文摘要

下向进路式充填法是开采破碎矿体行之有效的方法之一。在此环节中，充填体人工假顶的稳定性对于保障人员和设备安全是至关重要的。本文基于3D打印技术，探索制备了一种掺加菱形复合结构的尾砂充填聚合物。采用三点弯曲和数字图像关联（DIC）技术等综合手段，探讨菱形复合结构不同层高和灰砂比影响下尾砂尾砂充填聚合物的抗弯特性。试验结果表明：层高为14 mm的3D打印菱形聚合物组合试样具有极强的挠曲特性，最大挠度值达30.1 mm；而层高为26 mm的3D打印菱形聚合物组合试样在挠曲特性方面略差，但其抗弯强度较高，为2.83 MPa。本文研究结论能为下向充填体采矿法人工假顶构筑提供一定的理论参考依据。

关键词:

Research Article

Effect of layer thickness on the flexural property and microstructure of 3D-printed rhomboid polymer-reinforced cemented tailing composites

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Abstract

Abstract

For mines with poor ore bodies and surrounding rocks, the general mining method does not allow the ore to be extracted from underground safely and efficiently. For these mines, the downward layered filling mining technique is undoubtedly the most suitable mining method. The downward filling mining technique may eliminate the troubles relating to poor ore deposit conditions, such as production safety, ore loss rate, and depletion rate. However, in this technique, the safety of the artificial roof of the next stratum is of paramount importance. Cementitious tailings backfilling (CTB) that is not sufficiently cemented and causes collapses could threaten ore production. This paper explores a diamond-shaped composite structure to mimic the stability of a glued false roof in an actual infill mine based on the recently emerged three-dimensional (3D) printing technology. Experimental means such as three-point bending and digital image correlation (DIC) techniques were used to explore the flexural characteristics of 3D construction specimens and CTB combinations with different cement/tailings weight ratios at diverse layer heights. The results show that the 3D structure with a 14-mm ply height and CTB has strong flexural characteristics, with a maximum deflection value of 30.1 mm, while the 3D-printed rhomboid polymer (3D-PRP) structure with a 26-mm ply height is slightly worse in terms of flexural strength characteristics, but it has a higher maximum flexural strength of 2.83 MPa. A combination of 3D structure and CTB has more unique mechanical properties than CTB itself. This research work offers practical knowledge on the artificial roof performance of the downward layered filling mining technique and builds a scientific knowledge base regarding the successful application of CTB material in mines.
- tailings cemented fills;
- 3D printed rhomboidal polymer;
- three-point bending test;
- digital image correlation

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