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http://www.coaleducation.org/glossary.htm
Cage - In a mine shaft, the device, similar to an elevator car, ... Cap block - A flat piece of wood inserted between the top of the prop and the roof to provide bearing support. Car - A railway wagon, especially any of the wagons adapted to carrying coal, ore, and waste underground.
https://en.wikipedia.org/wiki/Glossary_of_coal_mining_terminology
A chock was originally a piece of timber used to support the face. In later years hydraulic chocks were used. Collier. In its most restricted sense, a collier is a worker who "gets" the coal, i.e. a hewer or coal getter. Contraband. Contraband was material banned from being taken down the mine, generally for safety reasons, such as matches and ...
https://www.911metallurgist.com/timber-support-underground-mining/
Using Steel Timber Set Underground Support (Figure 25) While it is unlikely that the small mine operator will encounter ground conditions requiring the use of steel sets, he should know that such sets are available. Fault zones containing heavy, water-saturated gouge are not uncommon. Ground of this kind may best be supported with steel sets.
http://www.the-crossword-solver.com/word/support+or+prop
Synonyms, crossword answers and other related words for SUPPORT OR PROP [crutch] We hope that the following list of synonyms for the word crutch will help you to finish your crossword today. We've arranged the synonyms in length order so that they are easier to find.
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 ...
http://www.the-crossword-solver.com/word/prop
Synonyms, crossword answers and other related words for PROP. We hope that the following list of synonyms for the word prop will help you to finish your crossword today. We've arranged the synonyms in length order so that they are easier to find.
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://www.thefreedictionary.com/pitprop
Define pitprop. pitprop synonyms, pitprop pronunciation, pitprop translation, English dictionary definition of pitprop. n a support beam in a mine shaft Noun 1. pitprop - a wooden prop used to support the roof of a mine sprag prop - a support placed beneath or against...
http://stacks.cdc.gov/view/cdc/10058/cdc_10058_DS1.pdf
deformation and loads acting on the rock mass and shaft support system, (2) determination of the physical prop- erties and strengths of the rock mass, (3) definition of the geometry of the shaft and surrounding mine openings, (4) simulation of the geometry and removal of the rock mass,
https://www.boatus.com/magazine/2018/february/how-to-install-a-dripless-shaft-seal.asp
Sometimes it helps to support the shaft and propeller outside the boat. Inspect the shaft for pitting and wear, especially the end from which the coupling was removed. Also inspect the shaft where the original packing rubbed on the shaft. If these are at all wasted, bent, or …
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