我矿始建于1958年,1964年转入地下开采,扩初设计规模为15万吨/年。在多年沿用房柱采矿法的基础上,为了提高矿石回采率和采场生产能力,我们就底盘漏斗采矿法进行了生产试验,并于1977年全面采用,使矿石年产量首次超过20万吨,近期生产能力约为30万吨/年。六年多来的实践表明,对于矿石稳固,顶板岩石由不稳至中稳、但具有自 I mine was founded in 1958, 1964 into underground mining, expansion design scale of 150,000 tons / year. On the basis of adopting the mining method of post and pillar for many years, in order to improve the recovery rate of ore and the production capacity of stope, we carried out the production test on the chassis funnel mining method and adopted it in 1977, making the annual ore output more than 200,000 tons for the first time, The recent production capacity of about 300,000 tons / year. More than six years of practice have shown that for the stable ore, the roof rock from unstable to medium stable, but with self