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煤矿开采时,合理的水平高度应以合理的阶段斜长和是否采用上、下山开采为前提,并能使开采水平有足够的储量和服务年限,矿井开采才会有良好的技术经济效果。
In coal mining, a reasonable level should be a reasonable stage of the ramp length and whether the use of the upper and lower mountain mining as a precondition, and make the mining level has sufficient reserves and service life, mine mining will have a good technical and economic results.