开滦煤矿是一个已开采九十多年的老矿。解放前由于帝国主义和官僚买办的长期掠夺、使矿井储量枯竭,当时年产量不足×百万吨,已探明的矿井残存储量只有××××万吨。解放后,在党和毛主席的英明领导下,现已发展成为具有×个大型煤矿、×座洗煤厂等设计能力年产原煤×× Kailuan Coal Mine is an old mine that has been mined for more than 90 years. Before the liberation, due to the long-term plunder of imperialism and bureaucratic compradors, the mine reserves were depleted. At that time, the annual output was less than 1 million tons, and the proven mine residual reserves were only ×××× million tons. After the liberation, under the wise leadership of the party and Chairman Mao, it has now developed into an annual output of raw coal × × with a design capacity of × large coal mines and × coal washing plant.