煤矸冲击液压支架尾梁的振-声响应特性研究
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中图分类号：TD67 文献标志码：A
Vibration-acoustic response characteristics of hydraulic support tail beam under coal-gangue impact
YANG Yang，GAO Jian，DING Shuangjie，WU Shuowen，CAO Yanze，LIUYilin，WANG Yukun （Collge of Mechanical and Electronic Engineering，Shandong University of Science and Technology， Qingdao 266590， China）
Abstract： Coal-gangue identification is akey technology for reducing the gangue content in rawcoal during fullmechanized top-coalcavingmining.Afectedbythehighdustconcentration，lowvisibilityand limited operating space in underground working environments，existing identification methods basedona single feature such as images，multispectral andray signals，sound，or vibrationacceleration have diffcultyachieving precise coal-gangue identification.To addressthis problem，vibrationand sound signals wereusedas jointidentification features，anda vibration-acoustic coupling model of coal-gangue impacting the tail beam ofa hydraulic support was established using COMsOL Multiphysics software.The dynamic behavior and sound pressure frequency spectrum characteristics of coal-gangue impacting the tail beam under different gangue shapes and incidence angles were investigated，and the distribution pattrns of vibration accelerationand sound pressure signals were obtained.The results showed that the stress，vibration acceleration amplitude，and sound pressure signal characteristics generated by gangue impacting the tail beam were all greater than those generated by coal. When spherical，cubic，andcylindricalcoal-gangue particles impacted the tailbeam，the maximumvon Mises stress， vibration acceleration amplitude，and main frequency of the sound pressure decreased successively.As the incidence angleof coal-gangue particles increased，the contact force，peak vibrationacceleration，and spectral centroid of the sound pressure signal during impact with the tail beam alldecreased，and theresponse attenuation rate during gangue impact was higher than that during coal impact. These findings provide a theoretical basis for constructing a coal-gangue identification strategy based on the fusion of multi-feature vibration-sound pressure signals.
Key words： top-coal caving mining； coal-gangue identification; coal-gangue impact on tail beam： vibration-acoustic response; vibration-acoustic multiphysics coupling simulation
0引言
煤炭高效、智能开采是提升煤矿安全生产水平和煤炭资源利用率的战略必选。（剩余13854字）