笏山金矿抢险救援6号钻孔快速准确中靶施工技术

Construction technology for target-hitting in No.6 borehole in Hushan Gold Mine

摘要:

笏山金矿发生事故后，我单位按应急救援指挥部的要求施工了6号救援钻孔。针对该矿区花岗岩硬度高，地层岩石破碎，以及地层含水丰富等特点，从设备安装到施工工艺及操作流程，制定了一套完整的施工技术方案。从而避免了误工误时，避免了救援过程中次生事故的发生。全孔采用气动潜孔锤钻进，合理调整钻进参数，不但解决了花岗岩地层进尺慢、钻效低的问题，还确保了钻孔一次性进入预定靶区，施工中做到了“稳、准、快”，最终圆满完成了救援孔的施工任务。

关键词:气动潜孔锤钻进;钻具中性点;保直防斜;中靶;抢险救援

Abstract:

After the accident happened in Hushan Gold Mine， our unit was required to construct No.6 rescue borehole by the emergency rescue headquarters. In view of the characteristics in this mining area， such as high hard granite， broken and water-rich formation， a complete construction technical plan was formulated from equipment installation to construction technology and operation flow； thus avoiding the delay in work and time， and secondary accidents in the rescue process as well. The pneumatic DTH hammer was used to drill the whole borehole with the drilling parameters reasonably adjusted， which not only solved the problem of slow advance and low drilling efficiency in granite， but also ensured that the borehole entered the predetermined target zone at the first attempt. The construction was “stable， accurate and fast”， leading to successful completion of the rescue hole.

Key words:pneumatic DTH hammer drilling;neutral point of drilling string;keep straight and prevent deviation;target hitting;emergency rescue