A young woman killed in an underground mine explosion in far western NSW has been remembered as someone who always had a smile on her face.

Holly Clarke, a 24-year-old miner from Cobar, was working at the Endeavor mine in her hometown about 450km east of Broken Hill, with two others when the explosion occurred about 3.45am on Tuesday.

WATCH THE VIDEO ABOVE: Two killed in Cobar mine explosion.

It is understood the trio were on a night shift and had travelled underground to set charges when the explosives unexpectedly detonated before they could reach safety.

One of the miners, 59-year-old Ambrose “Ambie” Patrick McMullen, was killed instantly.

Clarke and another 24-year-old woman, Mackenzie Stirling, were brought to the surface.

Clarke later died from her injuries, while Stirling

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