有底柱分段崩落法难采采场的中深孔爆破

• 作 者: 赖伟 尹贤刚 谌立勇 张大伟
• 机 构: 长沙矿山研究院,会理铅锌股份有限公司,
• 出 处: 矿业研究与开发
• 发表日期: 2012年01期
• 关键词: 采场 补偿空间 二次爆破 中深孔爆破 挤压爆破 矿石块度 中深孔 炸药单耗 采场放矿 采场爆破

针对有底柱分段崩落法难采采场矿山爆破效果差、大块多、悬顶卡斗事故频繁等问题,采用自拉槽小补偿空间微差复合挤压的小抵抗线大孔距两个采场联合爆破落矿方案,中深孔排间交错布置,不同倾角采用不同孔径的炮孔,拉底扩漏,采用多打孔、少装药的方法进行,有效解决了采场爆破存在的问题,爆破后矿石块度均匀,采场放矿效果良好,悬顶卡斗事故减少,二次爆破量大大减少,炸药单耗由0.4 kg/t降至0.27 kg/t。

Aiming at the problems such as poor blasting effect, large chunks and frequent capping accidents of caving mines with bottom pillars in sub-caving mining method, A mining stope combined blasting program, the arrangement of staggered deep row of holes arranged in different pitches with different aperture hole, pull the end of leakage, the use of multi-drilling, less charge method to effectively solve the existence of stope blasting The blasting results in uniform lumpiness, good ore dressing effect in the stope, reduction of overhead capping accidents, greatly reduced secondary blasting, and reduction of unit consumption of explosives from 0.4 kg / t to 0.27 kg / t.