用机械方法清除煤中的矸石,一般都使用滚筒碎选机进行选择性破碎。碎选机的生产能力受多种因素影响,影响生产能力的参数则为滚筒的长度、旋转的角速度和提升板的纵向倾角等。关于选择性破碎的理论至今还没有充分的研究,目前国内外仅有一些试验数 Mechanical removal of coal in the gangue, drum crusher are generally used for selective crushing. The production capacity of the crusher is affected by many factors, and the parameters that affect the production capacity are the length of the drum, the angular velocity of rotation and the longitudinal inclination of the lifting plate. The theory of selective fragmentation has not been fully studied so far. At present, only a few experiments at home and abroad