一、概略介绍龙烟铁矿矿床为成层赤铁矿,倾斜平均30°向南,其层次共为五层,厚度不等,由1-2公寸至2-3公尺,主层为等一层,厚度由1公尺-3公尺,埋藏比较稳定,其他四层时有尖灭,以下四五层最甚,成互层埋藏于页岩之下石英岩之上,地层年代生代震旦纪,矿质很好,可直接入高炉冶炼,现在开采的主要是第一层。在敌伪时期对这样好的矿层采取了掠夺的开采方法(洞室采矿),回采率很低,大量资源被浪费。解放后在党的领导下,经过一年多的恢复于1951 1. Briefly introduce the Longyan iron ore deposit as layered hematite, with an average slope of 30° to the south, with a total of five layers, ranging in thickness from 1-2 cm to 2-3 m. The main layer is One layer, thickness from 1m to 3m, burial is relatively stable, the other four layers are pinch out, the following four or five layers are the most, interbedded layers of quartzite below the shale, stratigraphic age On behalf of the Sinian, the minerals are very good and can be directly smelted into blast furnaces. The first layer is currently mined. In the period of enemy and puppeteism, such a good mining zone adopted a predatory mining method (cavage mining), the recovery rate was very low, and a lot of resources were wasted. After the liberation under the leadership of the party, after more than a year’s recovery in 1951