论文部分内容阅读
神农磷矿所属井田范围是宜昌磷矿区桃坪河块段的一部分。设计生产能力为15万吨/年。原设计采用脉外采准的普通房柱法开采。矿山投产后,随着采切工程的布置和回采作业的开展,进一步揭露了矿体。矿体的赋存状态,采矿技术条件,特别是地质构造远比原掌握的情况复杂,使原设计的采矿方法难以适用。迫切需要寻求合理的采矿方法。 一、开采技术条件 矿体走向南北,倾向东,走向长750米,一般倾角6～18°,个别地段达40°左右。 矿层按矿石类型自下而上可划分为如下三个分层:1.下贫矿(ph_1):为泥质磷块岩,平均厚2.78米,平均品位14.03％,因其品
The scope of the mine field owned by Shennong Phosphate Mine is part of the Taiping River block in Yichang Phosphate Area. Design production capacity of 150,000 tons / year. The original design using the pulse of the ordinary house method mining. After the mine put into operation, with the mining and cutting project layout and mining operations carried out further exposed the ore body. The occurrence of ore body, mining technology conditions, especially the geological structure than the original situation is complicated, so that the original design of the mining method is difficult to apply. There is an urgent need to find a reasonable mining method. First, mining technical conditions Ore body to the north and south, tend to the East, to 750 meters long, the general dip 6 ~ 18 °, some sections of about 40 °. The ore layer can be divided into the following three stratification by ore type bottom-up: 1. Lower lean ore (ph_1): is argillaceous phosphate rock with an average thickness of 2.78 meters and an average grade of 14.03%