我矿井下巷道大都是沿脉而行，弯道多，路基矿治、泥沙也多：加之轨道辅设不太合乎要求，因而电机车轮缘磨损较剧烈，往往车轮踏面尚好，而轮缘却已超过磨损极限，导致机车经常掉道。对于这种情况，过去我们常常是将车轮连同变速箱一起拆下，运至地面，更换新轮。这样，不仅劳 Most of the mine roadway along the pulse along the lines, corners and more, subgrade mine governance, sediment and more: coupled with the track auxiliary is not satisfactory, and thus the motor rim wear more intense, often wheel tread is still good, and the rim The wear limit has been exceeded, resulting in frequent off-road locomotives. In this case, in the past we often removed the wheel together with the gearbox, transported to the ground, the replacement of the new wheel. In this way, not only labor