Introduced the technique of the up-hand bearing of friction hoist in main well of Xinji No.2 coal mine of SDIC replaced by not fall to the ground,and found a new way for maintaining the hand bearing.

• 介绍了国投新集二矿主井摩擦式提升机上天轮轴承不落地更换的方法,为天轮轴承维修找到了一条新途径,使用效果良好。