兖州矿区地处经济发达而能源短缺、煤炭供应日趋紧张的华东地区。据估计,2000年华东地区的煤炭自给量将由1980年的76％降至54％。因此,合理加工利用煤炭资源,提高其社会效益及煤炭企业的经济效益乃是一项极为重要的任务。兖州矿区开发建设十几年来,煤炭产量增长幅度很大。1981年生产原煤271万t,1989年瓶增到1003万t,平均每年增加91万t。煤炭品种由单一原煤发展到洗精煤、筛选煤等20多个品种。在销售产品中,洗选、筛选产品及经过简单加 Yanzhou mining area is located in the economically developed and energy shortage, the increasingly tense supply of coal in eastern China. It is estimated that in 2000, coal self-sufficiency in East China will be reduced from 76% in 1980 to 54%. Therefore, it is an extremely important task to reasonably process and utilize coal resources, improve their social benefits and the economic benefits of coal enterprises. Yanzhou mining area development and construction of more than 10 years, a significant increase in coal production. In 1981, it produced 2.71 million tons of raw coal and in 1989 it increased to 10.03 million tons with an average annual increase of 910,000 tons. Coal varieties developed from a single coal to clean coal, coal screening more than 20 varieties. In the sales of products, washing, screening products and after a simple increase