Study on Mechanics and Flow Behavior of Glass Fiber Reinforced Cemented Sulfur Tailings Backfill
YIN Shenghua1,2,*, CAO Yong1,2, WU Aixiang1,2, HOU Yongqiang1,2, BAI Longjian1,2
1 School of Civil and Resource Engineering, University of Science and Technology Beijing, Beijing 100083, China 2 Key Laboratory of High-efficient Mining and Safety of Metal Mines, Ministry of Education, Beijing 100083, China
Abstract: In view of the particularity of the physical properties of cemented sulfur tailings backfill, the physical properties and flow properties of cemented sulfur tailings backfill (CSTB) were studied in detail through a series of laboratory tests and it was proposed to improve the physical pro-perties of CSTB by adding glass fiber. The results show that slurry fluidity basically follows the quadratic function increasing law with the increase of sulfur content. The fluidity of slurry decreases exponentially with the increase of fiber content, but the change of fiber length has no significant effect on the fluidity of slurry. The compressive strength and tensile strength of the cemented sulfur tailings backfill increased first and then decreased with the increase of fiber content, and both reached the maximum value when the fiber content was 0.6%. In addition, the increase of fiber length is also beneficial to improve the compressive strength and tensile strength of cemented sulfur tailings backfill and the improvement effect of fiber on tensile strength is obviously better than that of compressive strength. Moreover, the addition of fiber can not only significantly improve the compressive strength of the cemented sulfur tailings backfill, but also inhibit the strength deterioration of the cemented sulfur tailings backfill. The microstructure test shows that the fiber can effectively prevent the formation and expansion of pores and cracks, so as to improve the mechanical properties of CSTB and inhibit the strength deterioration of CSTB in the later stage.
通讯作者:
*尹升华,北京科技大学土木与资源工程学院教授、博士研究生导师。2003年中南大学资源与安全工程学院采矿工程专业本科毕业,2006年中南大学资源与工程学院采矿工程专业硕士毕业,2010年北京科技大学采矿工程专业博士毕业后留校任教至今,目前主要从事溶浸采矿、金属矿高效开采及矿山岩体力学等方面的研究工作。发表论文100余篇,包括Construction and Building Mate-rials、International Journal of Minerals、Metallurgy and Materials、Bioresource Technology、Engineering Geology等。ustxsh@163.com
引用本文:
尹升华, 曹永, 吴爱祥, 侯永强, 白龙剑. 玻璃纤维增强含硫尾砂胶结充填体的力学及流动性能研究[J]. 材料导报, 2023, 37(13): 21110083-7.
YIN Shenghua, CAO Yong, WU Aixiang, HOU Yongqiang, BAI Longjian. Study on Mechanics and Flow Behavior of Glass Fiber Reinforced Cemented Sulfur Tailings Backfill. Materials Reports, 2023, 37(13): 21110083-7.
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2023, Vol. 37 
