大倾角层状锰矿长壁式开采分析

Analysis of Long-wall Mining at Large Angle Layered Manganese Deposit

针对长沟锰矿矿石层状赋存条件,借鉴煤矿长壁式开采思想,创新性提出了单层崩落采矿法和俯伪斜走向长壁分段(密集)采矿法。比较分析新旧采矿方法,得出:矿体倾角大于35°时,采用俯伪斜走向长壁分段(密集)采矿法;当矿体倾角小于35°时,采用单层崩落采矿法。在特殊开采条件下仍然选用房柱采矿法。通过数值模拟研究表明:长壁工作面的循环进尺在1.6 m时,可以确保工作面的安全高效生产。

In view of the layered occurrence conditions of Changgou manganese deposit,and referring to the long-wall mining idea of coal mine, the single-caving mining method and oblique sublevel concentration coal mining methods are proposed. Compared with the several mining methods, the conclusion is that with the dip angle over 35°, the oblique sublevel concentration coal mining method is effective and with the dip angle less than 35°,the single-caving mining method is practical. The room-pillar method is still useful in special mining condition. The numerical simulations indicate that the long-wall working face with the cyclical footage of 1.6 m can assure safety and high effective production.