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!
Related 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 Details
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 Details
Dry mixed mortar plant is designed for enterprises which have small production scale of special dry mortar. It is a kind of modular production line which can meet the needs of producing multiple species dry mixed mortar and ordinary mortar in small bat
Production Capacity:200,000-500,000 tons per year Component Parts:Material storage tank, sand dryer, batching apparatus, mixer, dry powder packing machine, dust collector and conveyor.More Details
River Gravel Mobile Crushing production line in Kenya is composed of FTM938E69 mobile coarse crushing station, FTM935F1214L（4YK1860） medium and fine mobile crushing and screening station.
Processing capacity: 80 t/hApplied material: river gravelMore Details
Feb 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 sizeMore Details
Bord 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 safetyMore Details
Here 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 developmentMore Details
machinery 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 MoreMore Details
At 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 existingMore Details
subsidiary 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 mMore Details
Jan 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 methodMore Details
mechanized 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 areaMore Details