北氵名河铁矿主溜井具有围岩不稳定、含水量大、透水性好等特点 ,给施工带来诸多困难 ,面临溜井的施工工期短、任务重、确保工程质量 ,采用了特殊的注浆封堵井筒的渗漏水、导井反井钻进、钻爆法刷大井筒断面等施工技术 ,已取得了较好的施工效果 The Beitou Minghe iron ore main runner has the characteristics of unstable rock, large water content and good water permeability, which brings many difficulties to the construction. Facing the short construction period of the well, the task is heavy and the project quality is ensured, a special note Slurry plugging the well water leakage, guide shaft anti-well drilling, drill blasting big wellbore section and other construction techniques, has achieved good construction results