一.概述发展国民经济,需要足够的能源。我国以煤炭为主要能源,今后要大力开发煤炭。然而煤炭是一种采后不能再生的能源,所以要特别注意充分利用和节约煤炭资源。目前仍有不少的矿井对煤炭资源的开采很不合理,矿井回采率约为50％左右,水平回采率约为60％左右,采区回采率约为70％左右。有些矿井,特别是地方煤矿的煤炭 I. Overview The development of the national economy requires sufficient energy. In our country, coal is the main energy source, and coal should be vigorously developed in the future. However, coal is an energy source that can not be regenerated after harvesting, so pay special attention to making full use of and saving coal resources. At present, there are still many coal mines on the exploitation of coal resources is unreasonable, mine recovery rate of about 50%, horizontal recovery rate of about 60%, mining recovery rate of about 70%. Some mines, especially coal from local coal mines