open-cut mining

British

noun

Also called: opencast mining. strip mining. mining by excavating from the surface

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

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open-cut mining

But in the 1970s, new technology, including bigger dump trucks, made open-cut mining more competitive.

From Washington Post ● Nov. 11, 2021

Rather than tunnelling into the ground, Mr Dunstan is open-cut mining, which involves scraping away a few inches of rock with an excavator, and then periodically investigating for opals.

From BBC ● Jun. 28, 2017

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023