为适应煤矿经济发展的需要，从1993年4月起，我段在大同矿务局口泉矿山线开始运用带电阻制动的东风B型内燃机车。8台机车正式投入运用一年来，无论是在10个车站及22条专用线上调车作业，还是在虽只有25km长但具有连续20％o的坡道、曲线、桥梁、道口多的线路上牵引列车，在运输 In order to meet the needs of economic development of coal mines, from April 1993, I began to use Dongfeng B type locomotives with resistance braking in the mouth of Datong Mining Administration. Eight locomotives were officially put into operation in the past year, whether it is shunting operations at 10 stations and 22 dedicated lines or on lines with only 25 km of long ramps, curves, bridges and crossings with a continuous 20% o Train, in transit