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液压支架放顶煤冲击尾梁的动态响应

Dynamic response of a coal rock caving impact tail beam for hydraulic support.

作者信息

Zhao Lijuan, Han Liguo, Zhang Haining, Jin Xin, Wu Tiangu, Yang Shijie

机构信息

School of Mechanical Engineering, Liaoning Technical University, Fuxin, 123000, China.

The State Key Lab of Mining Machinery Engineering of Coal Industry, Liaoning Technical University, Fuxin, 123000, China.

出版信息

Sci Rep. 2022 Jul 7;12(1):11535. doi: 10.1038/s41598-022-15845-9.

DOI:10.1038/s41598-022-15845-9
PMID:35798965
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9262896/
Abstract

Based on the two-way coupling technology of Discrete Element Method-Multi Flexible Body Dynamics (EDM-FMBD), a virtual caving coal wall is established by using the discrete element software, EDEM. The rigid flexible coupling model of the tail beam of caving supports is established by using multibody dynamics software, RecurDyn. The stiffness of the oil cylinder is calculated by using the solid-liquid spring coupling theory and is replaced by a spring. By simulating the process of a coal rock collapse impacting the tail beam, the dynamic signal from the coal rock collapse impacting the tail beam to crushing in the coal caving stage of the comprehensive caving working face is studied, and the test is carried out underground. The angular acceleration at the hinge point of the tail beam is the largest and shows a variation pattern of "large at both ends and small in the middle". The definition of a "low amplitude band" on the surface of the tail beam is proposed. The force signal at the hinge point of the front link is the strongest and is the best measurement point for the force sensor; the angular acceleration signal at the hinge point of the tail beam is the strongest and it is the best measurement point for the angular acceleration sensor. The results have practical implications for the identification of the coal gangue and the adaptive control of support for integrated top coal mining.

摘要

基于离散元法-多柔体动力学双向耦合技术（EDM-FMBD），利用离散元软件EDEM建立虚拟放煤煤壁。利用多体动力学软件RecurDyn建立放顶煤支架尾梁的刚柔耦合模型。采用固液弹簧耦合理论计算油缸刚度并用弹簧代替。通过模拟煤岩垮落冲击尾梁的过程，研究了综放工作面放煤阶段煤岩垮落冲击尾梁直至破碎过程中的动态信号，并进行了井下试验。尾梁铰接点处的角加速度最大，呈现“两端大中间小”的变化规律。提出了尾梁表面“低幅值带”的定义。前连杆铰接点处的力信号最强，是力传感器的最佳测量点；尾梁铰接点处的角加速度信号最强，是角加速度传感器的最佳测量点。研究结果对煤矸石识别及综采放顶煤支架自适应控制具有实际意义。

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