我矿在连云港港口建设中，购进太原重型机器厂生产的WK．4挖掘机多台，由于持续的工作、现场平整度差及电铲的频繁调动，常因电铲在作业时不能平衡受力至使拉紧轴（KI12．18．07．00）断裂。在修复中我们采用了下列方法：（）镇平断裂处端面；（2）找出方轴中心钻出十100“‘” I mine in Lianyungang port construction, purchased Taiyuan Heavy Machinery Factory production WK. 4 excavator more than one, due to continuous work, poor site uniformity and shovel frequent mobilization, often due to power shovel in the operation can not balance the force to make the tension shaft (KI12.18.07.00) fracture. In the repair we used the following methods: () Zhenping fault surface at the end; (2) to find out the center of the square shaft drilling ten 100 ’