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由于十年浩劫,我国相当一部分矿井的资源回采率下降。据全国二十余个统配矿务局40处典型矿井的调查测算,矿井、水平、采区的回采率一般只分别达到50％、60％、70％,有的还要更低些。与历史较好水平和国家规定比较,相差甚远。 煤炭资源回采率低给煤矿建设和生产都带来严重后果:由于工业储量浪费多,采
Due to the devastation of ten years, a considerable part of the mine's resource recovery rate has dropped. According to the survey and calculation of more than 20 typical coal mines in more than 20 coal mines in the whole country, the recovery rates of mines, levels and mining areas are generally only 50%, 60% and 70% respectively, and some are even lower. Compared with the better historical level and national regulations, there is a long way to go. The low recovery rate of coal resources has serious consequences for the construction and production of coal mines. Due to the waste of industrial reserves,