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徐州矿务局自1983年实行总承包,原煤产量开始回升,每年以4%幅度递增,1985年产煤1283万t。而工作面单产水平确比1980年降低15.5％,平均每个工作面月产量减少2644t。由于工作面单产低,为了完成承包产量指标不得不增加工作面个数,它影响了企业的经济效益。全面机械化工作面不断增加,工作面平均长度和煤层生产能力没有变差:单产为什么降低?调查、分析生产矿井工作面单产的历史和现状,从而促使工作面单产
Xuzhou Mining Bureau since 1983, the implementation of the general contracting, raw coal production began to rise, with an annual increase of 4% in 1985, producing 12.83 million tons of coal. However, the working-level yield is indeed 15.5% lower than in 1980, with an average decrease of 2644t per month for each working face. Due to the low production of working face, in order to complete the output index of contracting had to increase the number of face, it has affected the economic efficiency of enterprises. The overall mechanized working face is increasing, the average length of the working face and the productivity of the coal seam are not deteriorating. Why is the yield lower? The investigation and analysis of the history and current status of the production of the working face of the coal mine prompts the yield per unit area