Belt deviation may cause great abrasion to the sides, and may let the coal fall on the second layer of the belt, so that the stern barrel may draw in coal and pull the belt apart.

• 皮带跑偏会使侧边磨损加剧，同时会造成煤落入第二层皮带，使尾部滚筒卷煤以致拉断皮带。