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

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.