现在看看五十年前拍摄的露天矿照片,就可知道露天采矿工业发生了多么大的变化。由于采用了现代采矿设备,使露天矿的劳动生产率提高了许多倍,单位生产成本大幅度降低。从昔日的蒸汽挖掘机到今日高效率、大功率装载设备以及从铁路运输到大型汽车运输的变革,使生产率有了显著的提高,并使单位成本大大降低。矿山公司和供应厂家在研究和试制方面的共同努力,也是促使劳动生产率稳定而明显地提高的一个原因。在此期间,由于使用了主计算机系统,而使会计、采购、库存管理和普通记录等后勤管理工作更加有效。上级管理部门把 Now take a look at the photos of open-pit mines taken 50 years ago to see how much the open-pit mining industry has changed. As a result of modern mining equipment, so that the open-pit mine labor productivity many times, unit production costs significantly reduced. From the old steam excavators to today’s high-efficiency, high-power loading equipment and changes from railroad transport to large-scale motor transport, productivity has risen dramatically and unit costs have been significantly reduced. The joint efforts of mining companies and suppliers in research and trial production have also contributed to the steady and significant increase in labor productivity. During this period, logistics management such as accounting, purchasing, inventory management and general records was more effective due to the use of the host computer system. Higher management to put