College of Mechanical and Vehicle Engineering, Taiyuan University of Technology
Shanxi Key Laboratory of Fully-Mechanized Coal Mining Equipment, Taiyuan University of Technology

刮板输送机作为煤炭综采工作面关键设备，承担煤料输运的主要任务。煤料的运动及力学行为对刮板输送机的设计及故障分析有着重要影响。但刮板输送机工作环境复杂且恶劣，难以开展有效的研究试验。针对真实试验无法分析井下刮板输送机与煤料的相互作用效应，采用离散元法和多体动力学构建刮板输送机刚散耦合仿真模型，从散料和机械角度对正常工况条件下的仿真模型进行验证。分别基于不同工作倾角、不同走向倾角和不同运量工况条件对仿真模型进行设定，研究不同工况条件下刮板输送机的刚散耦合效应。结果表明，基于离散元法和多体动力学构建的刮板输送机刚散耦合模型可以有效模拟刮板输送机的输运工况。正常工况条件下，煤料运动呈现堆状间歇分布，且刮板前侧煤料堆积多于刮板后侧。随着工作倾角的增大，煤料堆积最高点逐渐向着后侧刮板移动，中板平均受力逐渐增大，后侧刮板平均受力逐渐减小。随着走向倾角的增大，最高点逐渐向倾斜侧偏移，造成中部槽内煤料的分布不均，使得倾斜侧煤料受力大于另一侧，链条受力出现波动，两条链同步性较差。随着运量的增大，中板和刮板的平均受力逐渐增大。刮板输送机输送过程存在有效输送区域，煤料速度在有效输送区域内与链速基本相同，靠近槽帮处的煤料速度逐渐越低。中板磨损与煤颗粒−中板−刮板（链）的接触相关，当三者形成有效的三体接触时，中板受力和磨损会出现明显上升的趋势。研究结果为后续开展不同工况条件下刮板输送机磨损特性、故障分析等研究的仿真模型构建提供了指导，为分析不同工况条件下刮板输送机刚散耦合效应提供了参考。

As the key equipment of fully mechanized coal mining face, scraper conveyor undertakes the main task of coal transportation. The movement and mechanical behavior of coal have an important impact on the design and failure analysis of scraper conveyor. However, the working environment of the scraper conveyor is complex and harsh, and it is difficult to carry out effective research and experiments. The interaction effect between the underground scraper conveyor and the coal cannot be analyzed in the real test, based on the discrete element method and multi-body dynamics, the rigid-discrete coupling simulation model of the scraper conveyor was constructed, and the simulation model under normal working conditions was verified from the perspective of bulk materials and machinery. The simulation models were set based on different working inclination angles, different strike inclination angles and different traffic conditions, respectively, and the rigid-discrete coupling effect of the scraper conveyor under variable working conditions was studied. The results show that the rigid-discrete coupling model of scraper conveyor based on discrete element method and multi-body dynamics can effectively simulate the transport conditions of scraper conveyor. Under normal working conditions, the coal movement presents a heap-like intermittent distribution, and the coal accumulation on the front side of the scraper is more than that on the rear side of the scraper. With the increase of the working inclination, the highest point of coal accumulation gradually moved towards the rear scraper, the average force on the deck plate gradually increased, and the average force on the rear scraper gradually decreased. With the increase of strike inclination, the highest point gradually shifts to the inclined side, resulting in uneven distribution of coal materials in the line pan, making the stress of coal materials on the inclined side greater than that on the other side, and the stress of the chain fluctuates, and the synchronization of the two chains is poor. With the increase of the transportation volume, the average force of the deck plate and the scraper gradually increases. There is an effective conveying area in the scraper conveyor conveying process. The coal material speed in the effective conveying area is basically the same as the chain speed. The coal material speed near the chute wall is gradually lower. The wear of the deck plate is related to the coal particle - deck plate - scraper (chain) contact and when they form an effective three-body contact, there is a significant upward trend in the force and wear on the deck plate. The research results provide guidance for the subsequent simulation model construction of scraper conveyor wear characteristics and fault analysis under different working conditions, and provide a reference for the analysis of r rigid-discrete coupling effect of scraper conveyor under different working conditions.

国家自然科学基金资助项目（51875386，52204149）；山西省基础研究计划资助项目（202103021223080）

王学文，麻豪洲，李　博，等. 不同工况条件下刮板输送机刚散耦合效应研究[J]. 煤炭科学技术，2023，51（11）：190−201.

WANG Xuewen，MA Haozhou，LI Bo，et al. Research on rigid-discrete coupling effect of scraper conveyor under different working conditions[J]. Coal Science and Technology，2023，51（11）：190−201.