近年来,随着煤矿技术和装备的发展,以及电子计算机在煤矿生产中的应用,为建设大型矿井创造了必要的条件。一般地说,大型矿井的吨煤基建投资较少,劳动生产率较高,生产成本较低,增产潜力较大。因而,国外在发展煤炭工业的规划中,趋向于建设 In recent years, with the development of coal mine technology and equipment and the application of electronic computers in coal mine production, the necessary conditions have been created for the construction of large-scale mines. Generally speaking, large-scale mines have less capital investment per tonne of coal, higher labor productivity, lower production costs and greater stimulation potential. Therefore, foreign countries in the development of coal industry planning, tend to build