摘要
目的:随着地下金属矿山开采深度的增加,井下温度不断升高。本研究旨在探讨温度变化对超细尾砂充填料浆流动性的影响,以优化充填系统的设计和运行。方法:通过流变试验和数值模拟分析温度变化对料浆流动特性的影响,并结合工程需求,研究管道内径和入口流量对超细尾砂料浆流动特性的影响。结果和结论:超细尾砂充填料浆的流变性能可用Bingham模型表征。在输送过程中,速度场表现为中心结构流,可以通过调整入口流量和管道内径来提高输送效率,控制流速分布。在一定温度范围内,随着料浆温度升高,料浆的屈服应力和黏度减小,比摩阻减小;但当温度超过一定值时,料浆黏度反而增加,比摩阻也随之增加;温度对超细尾砂充填料浆的流动特性有显著影响,通过调整入口流量和管道内径可以改善输送效率并控制流速分布。意义:研究结果为地下矿山深部开采中充填系统的设计和运行提供了科学依据,有助于提高充填系统的效率和稳定性。
Purpose:As the depth of underground metal mining increases,the temperature underground continually rises.This study aims to investigate the impact of temperature variations on the flowability of ultrafine tailings backfill slurry,with the goal of optimizing the design and operation of backfill systems.Methods:The effects of temperature changes on slurry flow characteristics were analyzed through rheological experiments and numerical simulations.Additionally,the influence of pipeline diameter and inlet flow rate on the flow characteristics of ultrafine tailings slurry was studied in conjunction with engineering requirements.Results and Conclusion:The rheological properties of ultrafine tailings backfill slurry can be characterized by the Bingham model.During transportation,the velocity field exhibits a core structure flow,and adjusting the inlet flow rate and pipeline diameter can enhance transport efficiency and control velocity distribution.Within a certain temperature range,as the slurry temperature increases,the yield stress and viscosity of the slurry decrease,and the specific frictional resistance decreases;however,when the temperature exceeds a certain value,the slurry viscosity increases,and the specific frictional resistance also increases.Temperature has a significant effect on the flow characteristics of ultrafine tailings backfill slurry,and adjusting the inlet flow rate and pipeline diameter can improve transport efficiency and control velocity distribution.Significance:The research results provide a scientific basis for the design and operation of backfill systems in deep underground mining,helping to improve the efficiency and stability of these systems.The innovation of this study lies in systematically analyzing the combined effects of temperature,pipeline diameter,and inlet flow rate on the flowability of ultrafine tailings slurry,offering new insights and methods for practical engineering applications.
作者
史采星
杨凯
郭利杰
许文远
SHI Caixing;YANG Kai;GUO Lijie;XU Wenyuan(BGRIMM Technology Group,Beijing 100160,China;National Centre for International Research on Green Metal Mining,Beijing 102628,China)
出处
《有色金属（矿山部分）》
2024年第5期58-67,共10页
NONFERROUS METALS(Mining Section)
基金
国家重点研发计划项目(2021YFC2902102)
北京市科技新星计划(20220484057)。
关键词
超细尾砂
充填料浆
流变特性
数值模拟
料浆温度
ultrafine tailings
backfill slurry
rheological properties
numerical simulation
slurry temperature
