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WhatsApp: +86 18203695377WEBJan 1, 2013 · Section snippets Design for automation. For every 1m advance in a typical roadway development cycle (using a six roof bolt, four rib bolt per metre bolting density), 23 consumable items need to be handled consisting of 10 bolts, 10 washer/plates, one steel roof mesh module ( × m), and two steel rib mesh sheets ( × m).This .
WhatsApp: +86 18203695377WEBPortrait of Coal Cutting Heads on a Continuous Miner. Hydraulic coal cutting machine, named The Iron Man, in position on rail track undergground in a coal seam. Made by Carrett, Marshall Co., and shown at the Paris International Exposition of 1867. Wood engraving. Coal cutting machine on rails, powered by compressed air produced by a .
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WhatsApp: +86 18203695377WEBJan 1, 2013 · 3. Design constraints. The automation system in this paper was designed to suit mine roadway dimensions with a minimum roof height of m and minimum width of 5 m; a strata support bolt density of six roof bolts and four rib bolts per metre advance. The system also relies on using either one of two types of SDB.
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