By analysing and computing the forces exerting on the bottom door of drop-bottom car during unloading,the paper concluded that the angle of the bottom door and the dump rail were the main causes of the car skip motion.

• 通过底卸式矿车在卸载过程中活动车底门的受力分析与计算,认为车底门的开启角和卸载曲轨的形状是引起矿车跳动的主要原因。