Rheological properties and pipeline transportation of cemented waste rock backfill slurry

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

Abstract

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

CLC Number:

X936

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.

Figures/Tables 18

Table 1

Fig.1

Table 2

Fig.2

Table 3

Fig.3

Fig.4

Fig.5

Fig.6

Fig.7

Fig.8

Fig.9

Fig.10

Fig.11

Fig.12

Fig.13

Fig.14

Fig.15

References 14

[1]	何玉珍, 王文杰, 陈仲杰. 基于G1-RF组合赋权云模型的下向分层开采充填体稳定性评价[J]. 中国安全科学学报, 2025, 35(4):165-172. doi: 10.16265/j.cnki.issn1003-3033.2025.04.0474
	HE Yuzhen, WANG Wenjie, CHEN Zhongjie. Downward layered mining based on G1-RF combined empowerment cloudmodel evaluation of filling stability[J]. China Safety Science Journal, 2025, 35(4): 165-172. doi: 10.16265/j.cnki.issn1003-3033.2025.04.0474
[2]	WU Di, LIU Liang, EROL Y, et al. Numerical prediction of strength and temperature changes within cemented paste backfill considering barricade stability[J]. Engineering Science and Technology, An International Journal, 2025, 62:DOI:10.1016/J.JESTCH.2025.101966.
[3]	WU Di, ZHAO Ping, CHENG Wenwen, et al. Effect of microwave on coupled rheological and mechanical properties of cemented tailings backfill[J]. Construction and Building Materials, 2024, 44:DOI:10.1016/J.CONBUILDMAT.2024.137558.
[4]	LI Cuiping, LI Xue, RUAN Zhuen, et al. Analysis of homogeneity and rheological properties of filling slurry during the mixing process through electrical resistance tomography[J]. Powder Technology, 2023, 428:DOI:10.1016/J.POWTEC.2023.118850.
[5]	尹超宇, 冯光明, 丁玉, 等. 超高水材料单浆流变特性研究[J]. 金属矿山, 2017(6):41-46.
	YIN Chaoyu, FENG Guangming, DING Yu, et al. Research on the rheological properties of ultra-high water material single paste[J]. Metal Mine, 2017(6):41-46.
[6]	ROSS G, DE K, PETER J S. The effect of temperature on the yield stress of mineral suspensions[J]. Journal of Colloid and Interface Science, 2008, 328(1):187-193. doi: 10.1016/j.jcis.2008.09.084
[7]	邹正勤, 高谦, 南世卿. 充填采矿用全尾砂胶结材料流变特性研究[J]. 金属矿山, 2012(12):132-135.
	ZOU Zhengqin, GAO Qian, NAN Shiqing. Study on the rheological properties of full tailings cementing materials for filling mining[J]. Metal Mine, 2012(12):132-135.
[8]	黄玉诚, 董羽, 许保国, 等. 似膏体管道输送弯管段浆体流动数值模拟研究[J]. 煤炭工程, 2014, 46(3):84-86. doi: 10.11799/ce201403026
	HUANG Yucheng, DONG Yu, XU Baoguo, et al. Numerical simulation study of slurry flow in a pipeline with a curved section resembling a paste-like body[J]. Coal Engineering, 2014, 46(3):84-86.
[9]	付宜风, 雷成旺, 张璇, 等. 基于FLUENT的管道内壁表面状态对流体摩擦阻力的影响研究[J]. 润滑与密封, 2014, 39(5):23-27,107.
	FU Yifeng, LEI Chengwang, ZHANG Xuan, et al. A study on the effect of the inner wall surface condition of pipes based on FLUENT on fluid friction resistance[J]. Lubrication and sealing, 2014, 39(5):23-27,107.
[10]	侯志明, 侯志超, 王新乔. 基于ANSYS的充填管道系统优化模拟[J]. 现代矿业, 2015, 31(12):194-197.
	HOU Zhiming, HOU Zhichao, WANG Xinqiao. Optimization simulation of the filling pipeline system based on ANSYS[J]. Modern Mining, 2015, 31(12):194-197.
[11]	陆伟, 罗瑞, 张青松, 等. 充填工作面异常气体对传感器交叉干扰的影响研究[J]. 中国安全科学学报, 2025, 35(2):40-48. doi: 10.16265/j.cnki.issn1003-3033.2025.02.1081
	LU Wei, LUO Rui, ZHANG Qingsong, et al. Study on the impact of abnormal gases in filling workfaces on sensor cross-interference[J]. China Safety Science Journal, 2025, 35(2):40-48. doi: 10.16265/j.cnki.issn1003-3033.2025.02.1081
[12]	郭利杰, 刘光生, 马青海, 等. 金属矿山充填采矿技术应用研究进展[J]. 煤炭学报, 2022, 47(12): 4 182-4 200.
	GUO Lijie, LIU Guangsheng, MA Qinghai, et al. Research progress on the application of filling mining technology in metal mines[J]. Journal of China Coal Society, 2022, 47(12): 4 182-4 200.
[13]	程海勇, 吴爱祥, 吴顺川, 等. 金属矿山固废充填研究现状与发展趋势[J]. 工程科学学报, 2022, 44(1):11-25.
	CHENG Haiyong, WU Aixiang, WU Shunchuan, et al. Current status and development trends of solid waste filling in metal mines[J]. Chinese Journal of Engineering, 2022, 44(1):11-25.
[14]	LIU Liang, WU Di, ZHENG Shilong, et al. Heat development in cemented tailings backfill modeled by a coupled electro-chemical-thermal model[J]. Thermal Science and Engineering Progress, 2025, 57:DOI:10.1016/J.TSEP.2024.103111.

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

[1]	He Wen, He Gengfeng. Influence of pipelines wear by mine backfill slurry based on CFD-DEM method [J]. China Safety Science Journal, 2026, 36(5): 113-121.
[2]	Tan Luyao, Yao Yongzheng, Pan Aolan, Hu Maowei. Numerical simulation of hydrogen diffusion from hydrogen dispenser leakage [J]. China Safety Science Journal, 2026, 36(5): 224-233.
[3]	WANG Jiyun, WANG Zichao, ZONG Ruowen, LIU Xuanya. Study on hazard characteristics and onset time of hazard escalation of leakage fires in diesel road tankers [J]. China Safety Science Journal, 2026, 36(3): 194-202.
[4]	AN Xuexu, HU Zhiping, WANG Zhenlin, TIAN An'an, ZHANG Yonghui. Meso response mechanism of diorite under loading and unloading conditions [J]. China Safety Science Journal, 2026, 36(3): 221-228.
[5]	JIN Chenchen, DING Yong, LI Denghua. Equivalent permeation aperture identification method for geomembranes based on seepage-sensing structure [J]. China Safety Science Journal, 2026, 36(2): 145-152.
[6]	SUN Wei, MENG Shuchi, DING Yonghong, SHI Anzhong. Comparative study on shear stress distribution characteristics of tension-dispersed anchors in rock support [J]. China Safety Science Journal, 2025, 35(S2): 103-109.
[7]	GUO Weiqiang, LAN Tianwei, LU Kaixiang, LI Zhu, YAO Xinyu, FENG Wei. Mechanism analysis of overburden rock damage law and disaster caused by sudden water surge of thick coal seams [J]. China Safety Science Journal, 2025, 35(S2): 110-117.
[8]	DU Wenxiu, YAN Lu. Stability of open-pit mining slope: a case study of Barun mine [J]. China Safety Science Journal, 2025, 35(S2): 196-202.
[9]	LYU Jirui, CUI Ming, CAI Qingchi, ZHAO Yuanye, LI Qingwen. Influence of EPB construction sequence and soil chamber pressure on railway subgrade settlement [J]. China Safety Science Journal, 2025, 35(S2): 58-65.
[10]	WEN Jinglin, YIN Yongming, YU Zhengxing, WANG Yifan, LU Xin'ai. Force deformation and destructive features of mine slopes under varied conditions [J]. China Safety Science Journal, 2025, 35(S2): 66-72.
[11]	ZHANG Yu, ZHAO Meng, WANG Feiyu, WANG Ruixin. Study on distribution characteristics of wind flow in stopes of Haerwusu Open-Pit Coal Mine [J]. China Safety Science Journal, 2025, 35(S1): 130-136.
[12]	CAO Weiping, XIAO Hannan, LUO Longping, LYU Pin, ZHAO Ming. On bracing mechanism and stability of two-row inclined-vertical retaining piles [J]. China Safety Science Journal, 2025, 35(6): 60-69.
[13]	LUAN Tingting, HUANG Jun, YANG Guoliang, REN Changxing, LYU Pengfei. Research progress on influencing factors of explosion limit and explosion pressure of mixed gases [J]. China Safety Science Journal, 2025, 35(6): 79-87.
[14]	WU Feiyang, CHEN Dongliang, YIN Caihong, LYU Tingwei, SHA Yanshan, CHEN Shibo. Study on medium conversion characteristics of tank boiling overflow process based on Fluent [J]. China Safety Science Journal, 2025, 35(4): 158-164.
[15]	XUE Xilong, LI Jiale, WU Shuanjun, ZHANG Xiao, LIU Bin, ZHANG Qinli. Diffusion characteristics of blasting fumes in downward drift stope and determination of ventilation parameters [J]. China Safety Science Journal, 2025, 35(4): 76-84.