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https://encyclopedia2.thefreedictionary.com/Mine+Support
Mine Support a man-made structure erected in mines to prevent caveins and heaving of the surrounding rock, to preserve the required dimensions of the mine cross section, and to absorb and control rock pressure. Mine support must provide mine safety and be economical, portable, and simple to maintain, neither interfering with nor complicating the conduct ...
https://pathofexile.gamepedia.com/Minefield_Support
Supported Skills have 0.5% increased Mine Throwing Speed Supported Skills throw up to 4 additional Mines Supported Skills have (65-60)% less Mine Throwing Speed Supported Skills can have up to 4 additional Remote Mines placed at a time This is a Support Gem. It does not grant a bonus to your character, but to skills in sockets connected to it.
http://www.kau.edu.sa/Files/0052737/Subjects/(5)%20Mine%20support.pdf
How do we support mines? ؟ا آ • It is the job of mine engineer but with consultation with the mine geologist. • There are 6 (six) types of mine support: (1) Wooden logs support (2) Support using metal rods (3) Support using metal pins or roof bolts
http://crosswordheaven.com/clues/mine-passage
Jun 25, 2019 · Find answers for the crossword clue: Mine passage. We have 3 answers for this clue.
http://www.undergroundexplorers.com/safety1.htm
Headframes are wood or steel structures constructed over a mine shaft or winze to support pulleys used with cables and hoists for haulage and access. Shafts are vertical or inclined passages which connect the underground workings of the mine with the surface. Stopes are areas of the mine …
http://www.coaleducation.org/glossary.htm
Pillar - An area of coal left to support the overlying strata in a mine; sometimes left permanently to support surface structures. Pillar robbing - The systematic removal of the coal pillars between rooms or chambers to regulate the subsidence of the roof. Also termed "bridging back" the pillar, "drawing" the pillar, or "pulling" the pillar.
https://en.wikipedia.org/wiki/Shaft_mining
Shaft mining or shaft sinking is excavating a vertical or near-vertical tunnel from the top down, where there is initially no access to the bottom.. Shallow shafts, typically sunk for civil engineering projects differ greatly in execution method from deep shafts, typically sunk for mining projects.When the top of the excavation is the ground surface, it is referred to as a shaft; when the top ...
https://en.wikipedia.org/wiki/Underground_mining_(hard_rock)
Declines are often started from the side of the high wall of an open cut mine when the ore body is of a payable grade sufficient to support an underground mining operation, but the strip ratio has become too great to support open cast extraction methods. They are also often built and maintained as an emergency safety access from the underground ...
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