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Archive of SID
Jan 6, 2012 ... coefficient of static friction changed from 0.26 on polished steel plate to 0.87 on rubber surface. .... given in ASTM Standard D 3173-87 for coal.
File link: http://www.sid.ir/En/VEWSSID/J_pdf/84820120106.pdf
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DEM Modelling and Simulation of Coal Compaction by Stamping ...
ABSTRACT. Within stamp-charged coke making a large volume of coal is compacted to one single ..... This could include e.g. friction coefficients and solid density. Other ..... than being assigned static values over the full length of a simulation.
File link: http://pure.ltu.se/portal...nd_Rosenkranz_Kuyumcu.pdf
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Creep Along Weak Planes in Roof and How It Affects Stability
entry, most coal-measure rocks deform over time, even when no mining is taking ... Bowden and Tabor (1964) defined the coefficient of friction as the ratio between ... interfaces and thus may convert static friction to sliding friction. Almost all ...
File link: http://www.cdc.gov/niosh/mining/UserFiles/works/pdfs/cawpi.pdf
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Experimental and computational studies of dense granular flow ...
A transition from quasi-static to intermediate behavior is identified when a secondary vertical flow .... tion coefficient and particle–particle friction were set to 0.9 and 0.19, ..... (grant DE-FG26-07NT43070), administered under advanced coal re-.
File link: http://www.me.iastate.edu/files/2012/05/J27_CSD_2012.pdf
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PDF Xylethon Brochure - Dura Wear Corporation
coefficient of friction. Xylethon's coefficient of friction is .08-.t2 as pro- ... Coal hoppers and chutes. Wood chip and bark ... PULP AND PAPER (static). UHLE box ...
File link: http://www.durawear.net/documents/XYLETHONBROCHURE.pdf
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Oral Sciences n3 - Biblioteca Digital da Unicamp
Feb 25, 2013 ... There are two types of friction, static and kinetic. Static friction is opposed to any application of force, and its magnitude is exactly what it should.
File link: http://www.scielo.br/pdf/bjos/v12n1/09.pdf
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Chapter 5 - UPCommons
insufficient to produce motion and is related to the static friction coefficient. The second one, related ... contact in the PFEM. Simplifying the dependencies of the friction coefficient and ..... For mining in coal, Hughes suggested. 1.667. / . . (5.16) .
File link: http://upcommons.upc.edu/pfc/bitstream/2099.1/12351/10/Chapter5.pdf
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Slippery asphalt runways after rejuvenation. Airfield Pavements ...
It significantly reduces the runway friction coefficient (by up to 95 per cent compared to a dry runway) ... 65 kph and a static or side skid coefficient of 0.5 or higher at 50 kph [3]. Subsequent ... bituminous or coal-tar rejuvenation products. Recent ...
File link: http://profemery.info/papers/PIARC_rejuvenation_friction.pdf
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perimeter embankments to increase capacity, mitigate subsidence ...
is to build perimeter embankments using coarse coal refuse to raise the crest of the facility ... typically a post-earthquake static analysis where the shear strength of the ... Figure 3 shows similar coefficients of permeability (k) for samples compacted to 90 ... effective angle of internal friction from samples compacted to 90% to ...
File link: http://www.geoe.com/TechP...%2520Capacity%2520ETC.pdf
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A tough alternative - Fortis-steel.ru
coal has upon the materials moving or pro- cessing it is a ... wear steel, have a low coefficient of friction and will not ... or idler roller shells, static con- veyor deck  ...
File link: http://www.fortis-steel.ru/pub/download/1166634049964479.pdf
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