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https://www.911metallurgist.com/timber-support-underground-mining/
READ PART 1 of Timber Support in Underground Mining It is important to remember that only three pieces of the set are used to describe a square-set or express its efficiency or economy. For example, the boardfeet of lumber in a set refers only to one each of a cap, post, and girt. ... Loaded drift set — cap.
https://www.britannica.com/technology/drift-mining
In mining: Horizontal openings: drifts. All horizontal or subhorizontal development openings made in a mine have the generic name of drift. These are simply tunnels made in the rock, with a size and shape depending on their use—for example, haulage, ventilation, or exploration.
https://www.onepetro.org/conference-paper/ISRM-5CONGRESS-1983-051
SYNOPSIS: A rock mass classification system has been developed that enables the planner or operator of block or panel caving mines to arrive at support recommendations for production drifts. This system has been named the MBR (standing for ModifiedCited by: 30
https://www.scahome.org/publications/proceedings/Proceedings.13Lindstrom.pdf
CHASING YOUR TAILINGS: A REVIEW OF PLACER MINING TECHNOLOGY Susan Lindstrom, Consulting Archaeologist, Truckee, California ... drift mining. Narrowly defined pay streaks, buried ... serve as drainage divides and substrate to support …
https://www.911metallurgist.com/mining-levels-stations-drifts-crosscuts/
Figure 57, A, is a plan of the 550-foot level of the Hollinger mine in Ontario as it was in 1924 and where a network of parallel and cross lenses or veins of ore (shown in solid black) is developed from a main haulage drift in the footwall of the ore zone, from which crosscuts are driven approximately at right angles and about 300 feet apart to ...
https://www.youtube.com/watch?v=e4j9R4qQ44Q
Jun 09, 2016 · Want to know How To Dig a Tunnel , well ask no more cause we will teach you how to dig one in just about any material. We also will so you basic tunnel drifting techniques to find Gold. What could ...
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