司家营铁矿降低中深孔爆破大块率的措施

摘要

介绍司家营铁矿井下中深孔采矿爆破的现状，对中深孔爆破大块率高的原因进行了分析，通过加强现场地质素描、爆破参数优化、加强中深孔施工管理以及改变装药方式等措施，改善了采矿爆破效果，达到了降低大块率、输出合格矿石的目的。%The current situation of medium-length hole blasting of underground Sijiaying Iron Ore is briefly introduced.The cause of high boulder yield of medium-length hole blasting is analyzed;and by measures like strengthening the onsite geological sketch,optimizing blasting parameters,strengthening the medium-length hole construction management, and changing the way of charging etc.,the mining blasting effect is improved,achieving the purpose of reducing the boulder yield,and outputting qualified ore.