研究玄武岩纤维增强胶结充填料作为矿山充填可持续材料的基本性能。

Investigating the basic properties of basalt fiber reinforced cemented paste backfill as a sustainable material for mine backfilling.

作者信息

Hefni Mohammed A

机构信息

Mining Engineering Department, King Abdulaziz University, Jeddah, Saudi Arabia.

出版信息

Sci Rep. 2025 Mar 24;15(1):10073. doi: 10.1038/s41598-025-94131-w.

DOI:10.1038/s41598-025-94131-w

PMID:40128295

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC11933409/

Abstract

Mine backfilling technologies have evolved, making the mining industry more sustainable. Further gains could be made by exploring additives that enhance the mechanical, rheological, and thermal properties of backfill. In this study, a sustainable additive, basalt fiber (BF), was added to cemented paste backfill (CPB) samples at two BF lengths (12 and 18 mm) and three BF dosages (0.50, 0.75, and 1.0%). BF length and dosage influenced the properties of BF-reinforced CPB. Addition of 18 mm BF to the CPB at a dosage of 1% decreased the slump value by up to 74% compared with the control. Consequently, the calculated yield stress doubled from 191.8 Pa to 398.8 Pa. Incorporating 12-mm BF at a dosage of 1% improved the uniaxial compressive strength of the CPB by up to 35% after 7 days of curing. The thermal conductivity of CPB reinforced with 12 mm BFs at a dosage of 0.50% decreased by nearly 36%. Whereas most studies focus on the effects of BF on concrete and other construction materials, these findings show that BF has the potential to improve CPB properties for mining applications, which could help reduce binder content, contributing to improved project economics and sustainable mining practices.

摘要

矿用充填技术不断发展，使采矿业更具可持续性。通过探索能增强充填体机械、流变和热性能的添加剂，可进一步取得进展。在本研究中，将一种可持续添加剂玄武岩纤维（BF）以两种纤维长度（12毫米和18毫米）和三种纤维剂量（0.50%、0.75%和1.0%）添加到胶结充填料浆（CPB）样品中。纤维长度和剂量会影响玄武岩纤维增强CPB的性能。与对照组相比，以1%的剂量向CPB中添加18毫米的玄武岩纤维可使坍落度值降低多达74%。因此，计算得出的屈服应力从191.8帕增加了一倍，达到398.8帕。在养护7天后，以1%的剂量加入12毫米的玄武岩纤维可使CPB的单轴抗压强度提高多达35%。以0.50%的剂量添加12毫米玄武岩纤维增强的CPB的热导率降低了近36%。虽然大多数研究关注玄武岩纤维对混凝土和其他建筑材料的影响，但这些研究结果表明，玄武岩纤维有潜力改善用于采矿应用的CPB性能，这有助于减少胶凝材料用量，从而改善项目经济性并促进可持续采矿实践。