Analysis of the Bulk Coal Transport State of a Scraper Conveyor Using the Discrete Element Method

IF 1.2 4区工程技术 Q3 ENGINEERING, MECHANICAL

Strojniski Vestnik-Journal of Mechanical Engineering Pub Date : 2018-01-17 DOI:10.5545/sv-jme.2017.4790

Xuewen Wang, Bo Li, Zhaojian Yang

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引用次数: 19

Abstract

A scraper conveyor is the main transport equipment in a coal mine, and its condition considerably influences the production capacity and profitability of the enterprise. In this study, the discrete element method (DEM) was used to study the interaction between the scraper conveyor and bulk coal. The particle size and velocity distributions of bulk coal were analysed at different transport velocities, transport angles, feed velocities and mining heights by changing the transport conditions of the conveyor. The influence of the transport velocity, coefficient of static friction between particles and mass flow rate were also studied. The results showed that the particle size distribution of bulk coal is mostly unrelated to the transport state parameters in the stable transport stage. Large particles gather at higher positions, whereas small particles gather at lower positions. The speed of bulk coal in the front area of the scraper was equal to the velocity of the scraper, whereas the coal in other locations had a lower speed. The mass flow rate of the bulk coal increased with increasing transport velocity and reached its peak when the coefficient of static friction between particles was 0.4.

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用离散元法分析刮板输送机散煤输送状态

刮板输送机是煤矿的主要运输设备，其运行状况直接影响到企业的生产能力和盈利能力。本文采用离散元法(DEM)研究刮板输送机与散煤的相互作用。通过改变输送机的输送条件，分析了在不同输送速度、输送角度、给料速度和采掘高度下散煤的粒度和速度分布。研究了输运速度、颗粒间静摩擦系数、质量流量等因素的影响。结果表明:在稳定输运阶段，散煤粒度分布与输运状态参数基本无关;大颗粒聚集在较高的位置，而小颗粒聚集在较低的位置。散煤在刮板前部的速度与刮板的速度相等，而在其他位置的煤的速度较低。散煤的质量流率随输运速度的增加而增大，在颗粒间静摩擦系数为0.4时达到最大。

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来源期刊

Strojniski Vestnik-Journal of Mechanical Engineering 工程技术-工程：机械

CiteScore

3.00

自引率

17.60%

发文量

审稿时长

4.1 months

期刊介绍： The international journal publishes original and (mini)review articles covering the concepts of materials science, mechanics, kinematics, thermodynamics, energy and environment, mechatronics and robotics, fluid mechanics, tribology, cybernetics, industrial engineering and structural analysis. The journal follows new trends and progress proven practice in the mechanical engineering and also in the closely related sciences as are electrical, civil and process engineering, medicine, microbiology, ecology, agriculture, transport systems, aviation, and others, thus creating a unique forum for interdisciplinary or multidisciplinary dialogue.