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。
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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