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Φ114×6m DTH Drill Rod Application Case | Open-pit Iron Mine in Sichuan

Project Overview

  • Location: Sichuan, China
  • Mineral: Open-pit iron ore
  • Construction Equipment: Sunward 165A Integrated DTH Drill Rig
  • Supporting Drilling Tool: Φ114×6 m DTH Drill Rod
  • Application: Drilling of open-pit bench blasting holes
114×6m DTH Drill Rod Application Case Open-pit Iron Mine in Sichuan
114×6m DTH Drill Rod Application Case Open-pit Iron Mine in Sichuan

Located in Sichuan, this large-scale open-pit iron mine features high rock hardness and complex working conditions, with heavy workload for blasting hole drilling. Extremely strict requirements are imposed on drill rods in terms of torsional strength, wear resistance, joint reliability and service life. As the core procedure of open-pit mining, blasting hole drilling relies on drill rods as the key component to transmit power for the drill rig. Failures such as rod breakage, thread slipping and joint wear will directly cause shutdowns and increase the comprehensive mining cost.

This project adopts Φ114×6m DTH drill rods matched with Sunward 165A integrated DTH drill rig for open-pit iron ore blasting hole construction. The 6-meter-long single drill rod reduces rod connection times and auxiliary rod-changing time. It perfectly fits the mast stroke of the 165A drill rig and greatly improves the drilling efficiency of bench blasting holes.

Working Condition Pain Points

  1. The iron ore body in the mine is mixed with hard rock strata, bringing heavy impact load during drilling. Ordinary drill rods are prone to thread abrasion, rod bending and fracture failure.
  2. Continuous blasting hole drilling requires frequent assembly and disassembly of drill rods, leading to premature damage at joint positions.
  3. The mine pursues high drilling footage. Frequent shutdowns for rod replacement and drilling tool maintenance will severely delay mining progress and raise the cost per meter of drilling.

Product Advantages & On-site Performance

The Φ114×6m DTH drill rods used on site are manufactured with high-strength alloy pipe and friction welding technology. The rod body features high strength and excellent impact and torsion resistance. Precision machining and heat treatment are applied to threads for good sealing and smooth assembly & disassembly, performing steadily under hard rock conditions:

  1. Perfect Specification Matching: Φ114 outer diameter and 6m single length, compatible with Sunward 165A integrated rig. Longer single rod cuts down the number of connections and lowers risks of connection failures.
  2. Impact & Wear Resistance: Integrated treatment for rod body and joints withstands DTH impact and rotary torque, effectively resisting impact wear in hard rock and reducing rod breakage risks.
  3. Smooth Cuttings Discharge: Reasonable inner hole diameter ensures smooth compressed air cuttings removal, minimizing drill sticking and hole blockage and guaranteeing blasting hole straightness.
  4. Lower Comprehensive Operating Cost: Extended service life of drill rods reduces replacement frequency and downtime, increasing single-shift drilling footage.

Field Application Results

Long-term construction verification at this open-pit iron mine in Sichuan shows that the Φ114×6m drill rods paired with Sunward 165A integrated DTH rig deliver stable borehole quality. The straightness of blast holes meets blasting design requirements of the mine.

  • Less auxiliary time for rod connection, extending effective drilling hours of the drill rig;
  • Obviously slower thread wear compared with conventional drill rods, fewer accidents of rod breakage and lost drill strings;
  • Stable continuous blasting hole construction to ensure on-schedule blasting operations for iron ore mining.

Case Summary

The practice of the blasting hole project proves that Φ114×6-meter DTH drill rods have good compatibility with Sunward 165A integrated DTH drill rig. The drill rods adapt well to the complex hard rock working conditions of the open-pit iron mine in Sichuan. It achieves remarkable results in improving drilling efficiency, cutting drilling tool consumption and reducing shutdown losses, serving as a reliable drilling tool solution for blasting hole drilling in large open-pit iron mines.

Application Extension: Open-pit iron mines, quarries, earth-rock works, open-pit mine bench blasting hole drilling, compatible with integrated DTH drill rigs of the same specification.

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