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在顶板难冒落缓斜煤层使用液压支架【前苏联】技术科学副博士Ｋ．Ｍ．杜尔尼等由于露天开采所破坏土地的复耕十分落后而引起生态危机。最近几年，库兹巴斯发展采煤的前景仍以井工开采为方向。井工开采对环境的生态破坏最小。众所周知，由于用高效综采机组强化开采缓斜和倾...
In the roof is difficult to fall off gently inclined seam using hydraulic support [former Soviet Union] vice president of science and technology. M. Durnay et al. Caused ecological crisis due to the backward cultivation of the land destroyed by open-pit mining. In recent years, the prospects for the development of coal mining in Kuzbass are still in the direction of well drilling. Underground mining environmental damage to the environment the smallest. As we all know, due to the use of high-efficiency fully mechanized mining unit to enhance mining ramp and tilt ...