Longwall mining involves cutting long tunnels into a gold seam and removing the extracted gold by conveyor belt. As the miners and the machinery move along the seam, a hydraulic support system temporarily holds the rock ceiling in place.
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Cleanzine: your weekly cleaning and hygiene industry newsletter 19th July 2018 Issue no. 831. Your industry news first Number 1 for Recruitment We strongly recommend viewing Cleanzine full size in your web browser.