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Jun 01 2017 · Bordandpillar mining is used in first workings of a deposit andnbspwhen irregularly shaped deposits or sensitive environmental conditions call for a lighter touch...We are a professional mining machinery manufacturer, the main equipment including: jaw crusher, cone crusher and other sandstone equipment;Ball mill, flotation machine, concentrator and other beneficiation equipment; Powder Grinding Plant, rotary dryer, briquette machine, mining, metallurgy and other related equipment. which can crush all kinds of metal and non-metallic ore, also can be dry grinding and wet grinding.If you are interested in our products or want to visit the nearby production site, you can click the button below to consult us.Welcome to our factory to test machine for free!
Stone crushing plant is also called rock crushing plant and stone production line, which is the professional industrial machine to crush sand and stones. It is mainly composed of vibrating feeder, jaw crusher, impact crusher, vibrating screen, belt con
Production Capacity:50-800TPH Application Field:Hydropower, building material, highway, city construction, metallurgy, coal mining and so on.etc.
More DetailsAs a pure natural stone with high usage value, river gravel is formed in the long-term impact, squeeze and friction function. River gravel generally shows the color of black, white, yellow, red, green gray, etc.
Production Capacity:50-800TPH Application Field:Hydropower, building material, highway, city construction, metallurgy, coal mining and so on.etc.
More DetailsRelated Equipments: two PE600×900 jaw crushers, two impact crushers, two cone crushers, two sand makers and three circular vibrating screens.
Raw Material: iron ore Crushing Capacity: 300t/h Crushing Purpose: to turn iron ores with size less than 300mm into finished ores with size less than 5mm.
More DetailsGypsum powder plant is a kind of micronized line which turns natural dihydrate gypsum ore (raw gypsum) or industrial by-product gypsum (desulphurization gypsum, phosphogypsum, etc.) into construction gypsum (calcined gypsum) through crushing, grinding, he
Production Capacity: 1-30 TPH Applied Materials:Feldspar, calcite, talc, barite, fluorite, rare earth, marble, ceramics, bauxite, manganese, phosphate rock, etc.
More DetailsGranite Crushing production line in Cameroon is composed of GZD1300 × 4900 vibrating feeder, PE900 × 1200 jaw crusher, FTMCS430 single-cylinder hydraulic cone crusher, PF1315 impact crusher, 2YK2460 circular vibrating screen, 2YK2160 circular vibrating sc
Processing capacity: 250 t/hApplied material: granite
More DetailsThis micronized line for quicklime is in Teheran, Iran. The whole line includes pe250x400 jaw crusher, electromagnetic vibrating feeder, HGM175 grinding mill, hoist, electric control cabinet, packaging machine, pulse duster, etc., with the features of hig
Processing capacity: 15 t/hApplied material: Quicklime
More DetailsFeb 27 2016 · INTRODUCTION In India about 98 of underground output of coal is obtained by Bord and Pillar method and barely about 2 by longwall methods The other countries where Bord and Pillar method predominates are Australia The USA and South Africa The key to the successful Bord and Pillar mining is selecting the optimum pillar size
More DetailsBord and Pillar method of mining is one of the oldest methods of mining The success of Bord and Pillar mining is selecting the optimum pillar size If the pillars are too large then the extraction ratio decrease leading to less production and profitability and if the pillars are too small it becomes venerable to human safety
More DetailsHere we will discuss about Evaluation of bord and pillar mining system in mcl coal bord and pillar mining india production is achieved by conventional BordGet Price Sustainable development of the Indian coal sector Increased availability of energy especially electricity is important for India to help advance economic and human development
More DetailsBord Pillar is the traditional mining method used in India It is employed where geomining conditions are complex Coal is removed from the coal faces initially by developing a set of galleries leaving pillars in between to support the roof
More Detailsmachinery breakdowns in bord and pillar mining However in India in some cases the depth of mining for bord and pillar method has been around 600 m though mining at such depths is beset with the problems of strata control Sometimes low strength of coal limits the depth to which bord and pillar mining can be done 2 3 Longwall Method of Mining Get More
More DetailsAt present production by longwall mining accounts for a minor amount of total underground mining production with the majority coming from bordandpillar methods Since it is envisaged that longwall mining will require time to become established in India bordandpillar methods will continue to be dominant in the foreseeable future Thus it is necessary to apply new technologies to existing
More Detailssubsidiary of Coal India Limited DETAIL LAYOUT AND METHOD OF WORKING The mine there is being worked by Bord and Pillar method in which continuous miners are being used as the main equipment for extracting coal The Pillar size which is being kept for support of the overburden pressure is 35 m x 35 m 40 m x 40 m and 40 m x 35 m
More DetailsJan 01 2013 · Of the total output of coal from underground mines more than 90 of coal is obtained by the bord and pillar method the predominant method of mining followed in India and the rest is mined by the longwall mining method
More Detailsmechanized bordandpillar mining layout for a given piece of ground Vlakpoort and Moddergat using a given selection of machines This piece of ground contains the PGM bearing UG2 Reef with an average thickness of 124 cm and dipping at 18° with adverse strike and dip changes Two bordandpillar layouts were designed for this area
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