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米村矿采煤新技术将跨出国门郑州矿务局米村矿“三软”不稳定厚煤层放顶煤综采技术研究成果，已于１９９４年５月通过联合国技术信息促进系统（ＵＮＤＰ／ＴＩＰＳ）中国国家分部（ＴｅｃｌｌｎｉｃａｌＩｎｆｏｒｍａｔｉｏｎＰｒｏｍｏｔｉｏｎＳｖｓｔｅｎＮａｔｉｔｏ...
The new technology of coal mining in Mimura will step out of the research results of fully mechanized top coal caving technology with “three soft” unstable thick seam in Meicun Mine of Zhengzhou Mining Bureau. It was approved by UNDP / TIPS in May 1994, China National Division (TecllnicalInformationPromotionSvstenNatito ...