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Gold Science and Technology ›› 2023, Vol. 31 ›› Issue (2): 323-330.doi: 10.11872/j.issn.1005-2518.2023.02.096

• Mining Technology and Mine Management • Previous Articles     Next Articles

Experiment and Simulation Study on Crushing Characteristics of Ore Under Quasi-static Loading in a Mine

Shuhao HAO1(),Gaipin CAI1,2(),Cheng YU1,Huiming CHEN1   

  1. 1.School of Mechanical and Electrical Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, Jiangxi, China
    2.Jiangxi Province Engineering Research Center for Mechanical and Electrical of Mining and Metallurgy, Ganzhou 341000, Jiangxi, China
  • Received:2022-07-28 Revised:2022-12-22 Online:2023-04-30 Published:2023-04-27
  • Contact: Gaipin CAI E-mail:2416308183@qq.com;664431653@qq.com

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Abstract:

In order to study the crushing characteristics of ore （siliceous rock） in a mine under quasi-static loading，a crushing model of ore particle group was established by using Tavares crushing model on the basis of cylinder loading test，and the crushing characteristics of cylinder loading test and crushing simulation analysis were compared and analyzed.The results show that：（1） The breakage of ore particle group can be divided into three stages.In the tight stage，the void fraction of ore group is decreasing，and the breakage process of ore particle group basically does not occur.In the crushing stage，the void fraction further decreases，the stress on the contact points between ore increases，and some ore begin to break.In the agglomerating stage，the stress of ore particle group will increase rapidly，a large number of fine powder particles will be produced，and the agglomeration phenomenon will occur.（2） When the maximum loading pressure is 400 kN，with the decrease of the feeding particle size of ore with narrow particle size （2 mm range），the higher the proportion of small particles after crushing，the proportion of crushed ore of -6 mm under different particle sizes of -18+16 mm，-16+14 mm and -14+12 mm is 25.63%，29.45% and 33.46%，respectively.（3） The effectiveness of the Tavares model is verified by the comparison between simulation and experiment，and the simulation parameters of ore in a mine are calibrated，which provides a new method for the simulation of ore particle crushing，and the research results provide a new idea for the subsequent design of crusher.

Key words: ore particle group, press cylinder test, crushing characteristics, Tavares model, quasi-static loading, crushing model

CLC Number: 

  • TD912

Fig.1

Crushing process of Tavares model"

Fig.2

Quasi-static loading test device for ore in a mine"

Fig.3

Schematic diagram of loading cylinder"

Fig.4

Displacement-force curves of quasi-static loading test of ore in a mine"

Fig.5

Particle size distribution of ore after quasi-static loading test in a mine"

Table 1

Material intrinsic parameters"

材料密度/（kg·m-3）剪切模量/（×1010 Pa）泊松比
某矿石2 8302.50.25
加载压筒7 8007.90.30

Table 2

Contact mechanical parameters"

接触参数矿石—矿石加载压筒—矿石
弹性恢复系数0.200.25
静摩擦系数0.450.65
滚动摩擦系数0.300.50

Table 3

Experimental results of double pendulum impact crushing"

试验编号碎后筛分质量/g总质量/g
-18+14 mm-14+10 mm-10 mm
122.43.82.328.5
225.203.128.3
323.63.61.228.4
414.57.66.428.5
521.53.92.728.1

Table 4

Tavares model setting parameters"

参数名称数值
损伤系数3.0000
颗粒粒径的中位数8.0000
破碎能的拟合函数0.8400
破碎能分布函数的标准差0.4000
alpha_percentage49.6000
b0.0250
允许的最小破碎颗粒粒径/mm1.0000
纳入统计的最小破碎能量/J0.0001

Fig.6

Simulation process of crushing test of press cylinder"

Fig.7

Quasi-static loading simulation of particle size distribution of ore in a mine after crushing"

Barrios G K P， Tavares L M，2016.A preliminary model of high pressure roll grinding using the discrete element method and multi-body dynamics coupling［J］.International Journal of Mineral Processing，156：32-42.
Barrios G K P， Jiménez-Herrera N， Tavares L M，2020.Simulation of particle bed breakage by slow compression and impact using a DEM particle replacement model［J］.Advanced Powder Technology，31（7）：2749-2758.
Cil M B， Buscarnera G，2016.DEM assessment of scaling laws capturing the grain size dependence of yielding in granular soils［J］.Granular Matter，18（3）：1-15.
Cleary P W， Sinnott M D，2015.Simulation of particle flows and breakage in crushers using DEM：Part 1-Compression crushers［J］.Minerals Engineering，74：178-197.
Cui Shaowen， Guo Xiaofei， Xi Yue，et al，2020.Comminution tests of particle bed with different loading pressure［J］.Metal Mine，49（3）：114-119.
Delaney G W， Morrison R D， Sinnott M D，et al，2015.DEM modelling of non-spherical particle breakage and flow in an industrial scale cone crusher［J］.Minerals Engineering，74：112-122.
Guo Jin，2019.Visualization of the Crushing Process of Multi-scale Cohesive Particle Model［D］.Ganzhou：Jiangxi University of Science and Technology.
Hu Jian， Gong Fengqiang， Jia Hangyu，2020.Research on mechanical and energy dissipation characteristics of red sandstone in SHPB compression test［J］.Gold Science and Technology，28（3）：411-420.
Huang Dongming，2007.Research on Working Mechanism and Working Performance Optimization of Compressive Crusher［D］.Shanghai：Shanghai Jiaotong University.
Jiménez-Herrera N， Barrios G K P， Tavares L M，2017.Comparison of breakage models in DEM in simulating impact on particle beds［J］.Advanced Powder Technology，29（3）：692-706.
Liu Ruiyue，2020.Study on Mechanism and Performance Evaluation of Cone Crusher［D］.Beijing：University of Science and Technology Beijing.
Tavares L M， Rodriguez V A， Sousani M，et al，2021a.An effective sphere-based model for breakage simulation in DEM［J］.Powder Technology，392：473-488.
Tavares L M， Anderson S，2021b.A stochastic particle replacement strategy for simulating breakage in DEM［J］.Powder Technology，377：222-232.
Tavares L M，2007.Breakage of single particles：Quasi-static［J］.Handbook of Powder Technology，12：3-68.
Tavares L M，2009.Analysis of particle fracture by repeated stressing as damage accumulation［J］.Powder Technology，190（3）：327-339.
Xin Hengqi， Huang Yanli， Zhang Weiqing，et al，2020.Research on deformation and crushing rules and acoustic emission characteristics of gangue bulk under the condition of confined compression［J］.Journal of Mining and Safety Engineering，37（1）：162-168.
Xu Kun， Zhou Wei， Ma Gang，et al，2018.Review of particle breakage simulation based on DEM［J］.Chinese Journal of Geotechnical Engineering，40（5）：880-889.
Zhang Chengliang， Liu Lei， Wang Chao，2016.Advanced Rock Mechanics and Engineering Application［M］.Changsha：Central South University Press.
Zhou W， Yang L， Ma G，et al，2016.DEM analysis of the size effects on the behavior of crushable granular materials［J］.Granular Matter，18（3）：1-11.
崔少文，郭小飞，郗悦，等，2020.不同施载压力下物料颗粒床压载试验［J］.金属矿山，49（3）：114-119.
郭晋，2019.多尺度内聚颗粒模型的破碎过程可视化［D］.赣州：江西理工大学.
胡健，宫凤强，贾航宇，2020.SHPB压缩试验中红砂岩的力学与能量耗散特性研究［J］.黄金科学技术，28（3）：411-420.
黄冬明，2007.挤压类破碎机工作机理和工作性能优化研究［D］.上海：上海交通大学.
刘瑞月，2020.圆锥破碎机工作机理及性能优化研究［D］.北京：北京科技大学.
辛恒奇，黄艳利，张卫清，等，2020.侧限压缩条件下矸石变形破碎规律及声发射特征研究［J］.采矿与安全工程学报，37（1）：162-168.
徐琨，周伟，马刚，等，2018.基于离散元法的颗粒破碎模拟研究进展［J］.岩土工程学报，40（5）：880-889.
张成良，刘磊，王超，2016.高等岩石力学及工程应用［M］.长沙：中南大学出版社.
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