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一、老矿的概念所谓老矿是指进入衰老期的矿井。根据开滦的实际,我认为矿井进入衰老期主要有四个标志:第一、开采消耗储量超过矿井可采储量的2/3以上;或是矿
First, the concept of the old mine The so-called old mine is entering the aging of the mine. According to the actual Kailuan, I think there are four main signs of the mine into the aging phase: First, the mining consumption reserves exceed the mine recoverable reserves of more than 2/3; or mine