论文部分内容阅读
为研究放顶煤开采中岩石的掉落冲击过程,结合碰撞冲量和碰撞回复系数,建立了岩石冲击金属板的碰撞过程中速度增量的数学模型。在此基础上,分别建立相同质量、不同形状下的岩石有限元损伤模型,对单颗粒岩石高空跌落冲击金属板的冲击试验进行仿真模拟,在对岩石和金属板进行振动特性分析的同时,研究不同的碰撞接触面积对振动特性的影响。
In order to study the drop impact process of rock during top coal caving mining, a mathematical model of the velocity increment during the impact of rock against metal plate was established based on the collision impulse and the coefficient of collision recovery. On this basis, the finite element damage model of rock under the same quality and different shape is established, and the impact test of single-particle rock at high altitude and falling impact plate is simulated. At the same time, the vibration characteristics of rock and metal plate are studied. Effect of different collision contact area on vibration characteristics.