The selection of depressurization method, practical implementation of depressurization engineering and the realization of smooth extraction of high stress difficult-to-mine block ar…
介绍了卸压方法的选择及卸压工程的具体实施，实现了小官庄铁矿高应力难采矿块的顺利回采。
We have got good economic benefit by adopting the apply of multiple ceiling coal mining in the Mine Block of Hegang.
在鹤岗矿业集团公司应用综采放顶煤采煤法，取得了良好的经济效益。
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