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One of the most important aspects of underground hard rock mining is ventilation. Ventilation is the primary method of clearing hazardous gases and/or dust which are created from drilling and blasting activity (e.g., silica dust, NOx), diesel equipment (e.g., diesel particulate, carbon monoxide), or to protect against gases that are naturally ...
The Granite Mountain/Speculator Mine disaster of June 8, 1917, occurred as a result of a fire in a copper mine, and was the most deadly event in underground hard rock mining in United States history. Most men died of suffocation underground as the fire consumed their oxygen; a total of 168 miners were killed.
The Willow Creek mining district, also known as the Independence Mine/Hatcher Pass district, is a gold-mining area in the U.S. state of Alaska. Underground hard-rock mining of gold from quartz veins accounts for most of the mineral wealth extracted from the Hatcher Pass area. The first mining efforts were placer mining of stream gravels, and ...
The Hard Rock Miner's Handbook is a reference book that deals with the underground hard-rock mining industry. It was written by engineer Jack de la Vergne as a non-profit publication. [1] The first edition was published in 2000 by McIntosh Engineering, a mining engineering consulting company. [2]
The latter quarter of the nineteenth century and first decade of the twentieth employed miners and mining technology invented on the Comstock, throughout various other mining camps in the west. Deep underground, hard rock mining was a constantly evolving development for the miners and their companies, and the tactics developed on the Comstock ...
It has a grid of 16-foot-high (4.9 m), 40-foot-wide (12 m) tunnels separated by 25-foot-square (7.6 m) limestone pillars created by the room and pillar method of hard rock mining. [1] The complex contains almost 10.5 miles (16.9 km) of illuminated, paved roads and several miles of railroad track.
Underground hard-rock mining; Underground soft-rock mining; W. Whim (mining) Winze This page was last edited on 3 September 2017, at 18:24 (UTC). Text is available ...
Shaft mining or shaft sinking is the action of excavating a mine shaft from the top down, where there is initially no access to the bottom. [1] Shallow shafts , typically sunk for civil engineering projects, differ greatly in execution method from deep shafts, typically sunk for mining projects.