东乡铜主要使用1．2m3及0．75m3两种型号的矿车（一般保持在200部左右）。通过对在用矿车运行情况的调查，我们发现，矿车使用状况并不理想，主要表现在故障多影响使用，尤其是行走车轮部分，占矿车故障总数的80％以上。因此，更换及维修矿车行走轮部分是我矿车维修工作中的一? Dongxiang copper main use of 1.2m3 and 0.75m3 two types of tub (generally maintained at 200 or so). Based on the investigation of the operation status of mine cars, we found that the condition of mine cars was not satisfactory. This was mainly manifested in the fact that the fault was mostly affected by the use of the fault, especially the part of walking wheels, accounting for more than 80% of the total number of mine car faults. Therefore, replacing and repairing the trolley part is one of my mine repairs.