目前,我国铁路运量中,大宗散装货物约占70％,其中煤炭的运量占38％。随着煤炭确定为我国主要的能源物资,以及在对外经济交流中,煤炭出口量日益增多,煤炭运输中的铁路运量还要不断增多。为了适应这一形势,必须在850米站线有效长的条件下,进一步提高货运列车牵引总重,以加速煤炭运输,主要是晋煤外运。为此,铁道部 At present, China’s railway traffic volume, about 70% of bulk cargo, of which 38% of coal traffic. As coal has been identified as China’s major energy source and material, as well as in the foreign economic exchange, the export volume of coal has been on the rise, and the volume of rail transport in coal transportation has also been on the rise. In order to adapt to this situation, it is necessary to further increase the total traction of freight trains under the condition of an effective length of 850 meters of station lines in order to speed up coal transportation, mainly through the transportation of coal from outside Shanxi. To this end, the Ministry of Railways