DDH1 breaks drilling depth mark 

DDH1 has created history after drilling the deepest mineral core hole in Australia.

The record was achieved at Northern Star Resources’ Jundee gold mining operations near Wiluna in Western Australia, beating the previous core drill record by 200m, which was recorded at Kalgoorlie’s Super Pit in 2015 and reportedly stopped at 3011.5m. 

The drill was originally planned to stop at 3100m, but some intriguing indications made Northern Star push on. By its February 28 conclusion, the drill hole, which employed Sandvik NHD heavy duty rods rated to 3000m and a 2500m-rated Sandvik DE880 rig, had reached an impressive depth of 3217m. 

This was beyond the NHD drill rods and DE880 rigs rated capacity, but not beyond their safe technical limits, according to DDH1 CEO Murray Pollock.

“Sandvik’s 3000m rating for the NHD is conservative,” Mr Pollock said. 

“It’s a tough, very reliable drill rod which is obviously capable of more.”

Mr Pollock said if it wasn’t for Northern Star calling a halt, DDH1 could have continued drilling past the record depth, which had a true vertical depth of 2625.1m. 

A pioneer of deep directional drilling, Mr Pollock said pushing the drill boundaries was becoming a growing trend since most of the more accessible deposits had already been discovered, prompting exploration companies to use sophisticated geophysical methods to highlight deep structures.

Among other projects, DDH1 is currently drilling a 2950m deep hole at St Barbara’s Gwalia gold mine, north of Kalgoorlie. The company is also engaged in a significant number of other exploration drilling operations across WA, Northern Territory and the east coast.

Mr Pollock said for quality, reliability, safety, efficiency and productivity, Sandvik was the company’s top choice. 

“Sandvik’s the industry standard,” he said. “It’s the brand many of our client companies specifically ask for, with good reason. 

“It’s a great feeling to know you can have complete confidence in your rigs, drill rods and other drilling equipment.”

With the frontiers of exploration drilling continually expanding, DDH1 predicted there would soon be new records set through the company’s highly successful partnership with Sandvik.

Picture: DDH1 Managing Director Murray Pollock and Operations Director Matt Thurston.

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