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Numerical and test study on dynamic characteristics of the tail beam of top coal caving hydraulic supports
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Mingke WU1, Shanguo YANG1, 2, 3, Yao WANG1, Bin MENG1, Zheng YANG1, Houguang LIU1, 2, 3
Journal of Mechanical Strength | 2025, 47(1) : 50 - 57
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Journal of Mechanical Strength | 2025, 47(1): 50-57
• Experimental Research·Testing Technology •
Numerical and test study on dynamic characteristics of the tail beam of top coal caving hydraulic supports
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Mingke WU1, Shanguo YANG1, 2, 3, Yao WANG1, Bin MENG1, Zheng YANG1, Houguang LIU1, 2, 3
Affiliations
  • 1.School of Mechanical and Electrical Engineering, China University of Mining and Technology, Xuzhou 221116, China
  • 2.Jiangsu Province and Education Ministry Co-sponsored Collaborative Innovation Center of Intelligent Mining Equipment, Xuzhou 221116, China
  • 3.National Key Laboratory of Intelligent Mining Equipment Technology, Xuzhou 221116, China
Published: 2025-01-15 doi: 10.16579/j.issn.1001.9669.2025.01.006
Outline
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In order to determine the sensitive vibration characteristic parameters of coal and gangue in the process of top coal caving and improve the intelligent identification accuracy of coal and gangue, the dynamic characteristics of the tail beam of the hydraulic support were studied. Firstly, the rigid-flexible coupling dynamic model of top coal caving hydraulic support and coal gangue was established, and the vibration acceleration of the tail beam of the hydraulic support in the process of coal caving was calculated. Secondly, the acceleration response was decomposed by variational mode decomposition (VMD) to obtain the intrinsic mode function (IMF), and the time domain and frequency domain characteristics of each IMF component were analyzed. Thirdly, the t-distributed stochastic neighborhood embedding (t-SNE) method was used to reduce the dimension of these features, and the average silhouette coefficient (ASC) of different features was calculated. The vibration characteristics of the tail beam under the impact of coal gangue were compared and studied. Finally, the bench of the top coal caving hydraulic support was built to verify the calculation results of the model. The results show that the energy, singular value, mean frequency, peak frequency, spectral centroid and frequency variance in the IMF component of the vibration acceleration of the tail beam are sensitive to the characteristics of coal and gangue, which can be used as the characteristic parameters of the coal and gangue identification.

Top coal caving  /  Coal gangue identification  /  Finite element method  /  Discrete element method  /  Variational mode decomposition
Mingke WU, Shanguo YANG, Yao WANG, Bin MENG, Zheng YANG, Houguang LIU. Numerical and test study on dynamic characteristics of the tail beam of top coal caving hydraulic supports[J]. Journal of Mechanical Strength, 2025 , 47 (1) : 50 -57 . DOI: 10.16579/j.issn.1001.9669.2025.01.006
Funding
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  • National Natural Science Foundation of China(52274162)
  • Priority Academic Program Development of Jiangsu Higher Education Institutions(PAPD)
Appendix
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Year 2025 volume 47 Issue 1
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63
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Article Info
doi: 10.16579/j.issn.1001.9669.2025.01.006
  • Receive Date：2024-05-16
  • Online Date：2026-03-18
  • Published：2025-01-15
Article Data
Affiliations
History
  • Received：2024-05-16
  • Revised：2024-06-11
Funding
National Natural Science Foundation of China(52274162)
Priority Academic Program Development of Jiangsu Higher Education Institutions(PAPD)
Affiliations
    1.School of Mechanical and Electrical Engineering, China University of Mining and Technology, Xuzhou 221116, China
    2.Jiangsu Province and Education Ministry Co-sponsored Collaborative Innovation Center of Intelligent Mining Equipment, Xuzhou 221116, China
    3.National Key Laboratory of Intelligent Mining Equipment Technology, Xuzhou 221116, China

Corresponding:

YANG Shanguo, E-mail：
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表12种不同金属材料的力学参数
科
Family		 属数
Number of
genus		 种数
Number of
species		 占总种数比例
Percentage of
total species (%)		 属
Genus		 种数
Number of
species		 占总种数比例
Percentage of total
species (%)
鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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