北洺河铁矿主溜井的施工技术

Technologies of Beiminghe Iron Mine's Main Pass Construction

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 。

The main passes of Beiminghe Iron Mine were characterised by unstable surrounding rock,great water content and good water infiltration,which brought many difficulties to the construction.In light of the short period of construction,heavy task and construction quality guaranttee,some construction technologies such as special grouting for blocking the infiltrated water of the shaft,pilot and raise driving,drilling blasting method for large shaft section were adoped and achieved good effects.