At present, the crushing efficiency of ball mill of the crushing coal samples in the measurement of coal seam gas content is low. According to the grinding mechanism of coal ball mill, through the study of the motion state of materials in materials store room, the ball mill design method of "the bearing directly driven by motor to rotate the coal sample tank" is used. This method simplifies the device and improves the crushing efficiency.%目前煤矿测量煤层瓦斯含量中粉碎煤样使用的球磨机粉碎效率低.根据煤矿球磨机的磨矿机理,通过研究物料仓内物料的运动状态,采用了"电机直接带动轴承使煤样罐转动"的球磨机设计方法,简化了装置,从而提高了粉碎效率.
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