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近年来,我国冶金采矿界对分期陡帮开采问题正在展开日益广泛的讨论。如何正确理解和审慎研究这一新的采矿工艺,进而在我国矿山设计和生产中稳妥可靠地推广应用,这是采矿工作者面临的一项艰苦任务。本文拟对这一采矿工艺的主要技术特征、它的技术经济效益以及我们的几点看法作一简要的论述。一、沿革和主要技术特征五十年代初,国外(首先是加拿大和美国)一些石灰石矿和采石场,出现了一种新的露天
In recent years, China's metallurgical mining community is stepping up an increasingly extensive discussion on staged mining. How to properly understand and study this new mining technology carefully and then promote it safely and reliably in mine design and production in our country is a difficult task for mining workers. This article intends to give a brief account of the main technical features of the mining process, its technical and economic benefits and some of our observations. I. History and Major Technical Features In the early 1950s, a number of new limestone mines and quarries abroad (first in Canada and the United States)