姑山铁矿床露天采场第四系承压水下开采实践

Practice of Mining Under the Pressure Water of Quaternary System Layer in Gushan Open-pit Mine

姑山铁矿采用嵌入式可控双液灌浆帷幕技术对矿体上覆第四系砂砾卵石层承压水进行封堵,上部地层和封闭圈内疏干放水控制,结合第四系边坡剥离和治理,基岩控制爆破等技术措施,成功解决了露天采场第四系承压水下矿体开采难题。

Combined with technical measures of drainage control of the upper strata and within closed loop, of Quaternary system slope stripping and of bedrock controlled blasting, the embedded control two-shot grouting curtain technology is introduced to stop the pressure water of the grit scree of Quaternary system layer overlying iron ore. By using this technology, the problem of mining under the pressure water of Quaternary system layer in open pit mine has successfully been resolved.