废石胶结充填料浆流特性和管道输送研究

doi:10.16265/j.cnki.issn1003-3033.2025.S2.0023

摘要/Abstract

摘要：

为优化矿山充填工艺、提升安全和控制成本,以矿山废石、水泥和水制备的充填料浆为研究对象,采用ICAR流变仪开展流变测试,系统分析废石颗粒级配、灰废比及料浆质量浓度对其流变性能的影响,并基于ANSYS-FLUENT软件进行数值模拟。结果表明:随废石粒径增大、灰废比减小或质量浓度提高,料浆的屈服应力和塑性黏度均显著增大;其中,浓度每提高1%,屈服应力约增加10%,黏度增长则呈现先缓后急的趋势。管道阻力损失随管径增大近似线性降低;竖直管道中料浆流速因重力持续加快,弯管段出现显著流速变化,水平段流速分布呈下高上低特征,整体最大值位于中心偏下区域。

关键词: 废石, 充填料浆, 流变特性, 管道输送, 数值模拟

Abstract:

To optimize the mine filling process and improve safety and control costs, the backfill slurry prepared from mine waste rock, cement, and water was taken as the research object. An ICAR rheometer was used to carry out rheological tests, and the effects of waste rock particle gradation, ash/waste ratio, and slurry mass concentration on rheological properties were analyzed. Then, a numerical simulation was performed based on ANSYS-FLUENT software. The results show that the yield stress and plastic viscosity of the slurry increase significantly with the increase of the waste rock particle size, the decrease of the ash/waste ratio, or the increase of the mass concentration. Among them, for every 1% increase of the concentration, the yield stress increases by about 10%, and the increase of the viscosity shows a slow and then rapid trend. The resistance loss of the pipeline approximately decreases linearly with the increase of the pipe diameter. The slurry flow rate in the vertical pipeline is accelerated continuously due to gravity. There is a significant change in flow rate in the elbow section, and the distribution of flow rate in the horizontal section is characterized by a feature: higher at the bottom and lower at the top. The overall maximum value is located in the center of the lower region.

Key words: waste rock, backfill slurry, rheological property, pipeline transportation, numerical simulation

中图分类号:

X936

李磊, 吴迪, 杨官鼎. 废石胶结充填料浆流特性和管道输送研究[J]. 中国安全科学学报, 2025, 35(S2): 29-35.

LI Lei, WU Di, YANG Guanding. Rheological properties and pipeline transportation of cemented waste rock backfill slurry[J]. China Safety Science Journal, 2025, 35(S2): 29-35.

图/表 18

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影响因素	试验序号	废石粒径/ mm	灰废比 (水泥∶废石)	料浆质量浓度/%
废石粒径	A₁	-10	1/8	80
	A₂	-15
	A₃	-20
灰废比 (水泥∶废石)	B₁	-15	1/6	80
	B₂		1/7
	B₃		1/8
	B₄		1/9
	B₅		1/10
料浆质量浓度	C₁	-15	1/6	78
	C₂			79
	C₃			80
	C₄			81
	C₅			82

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