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龙烟铁矿在日本帝国主义掠夺性的开采下,大量矿藏资源遭到破坏,他们不仅使用回采率极低的房柱采矿法,而且巷道只布置在第一层矿中.解放后,恢复了生产,同时根据地质条件采用了回采率较高的长壁采矿法,继而又根据苏联专家建义把巷道布置在薄层矿内,为开采薄层矿提供了可能性.龙烟铁矿从1955年9月开始薄层矿(采三层矿)的试采工作.经过六个月的试采得出初步经验,逐于1956年3月又开始了薄层合层采矿的试采,现将试采薄层及二三层合层矿的初步经验介绍如下.
Longyan Iron Ore With the predatory exploitation of Japanese imperialism, a great deal of the mineral resources were destroyed. They not only used the pillar mining method with extremely low recovery rate, but also the tunnel was arranged only in the first layer of mine. After liberation, Production, at the same time, according to the geological conditions, the recovery rate of the longwall mining method is adopted, and then according to the Soviet Union experts built the roadway in the thin seam mine, providing the possibility of mining thin seam ore.Longyan iron ore from 1955 Beginning of the trial operation of thin-bed mines (mining of third-floor mines) in September of the year, preliminary experience was obtained after six months of trial mining and trial production of thin-bedded mines commenced in March 1956. Now, Trial mining and thin layer of two or three layers of ore deposits of the initial experience described below.