Underground mining is conducted using conventional drill and blast methods (including total extraction mining, stooping), as well as fully mechanised, continuous miner equipment on a bord and pillar system. Opencast mining is undertaken using the strip mining method with dragline.
The only way to achieve this is to reduce production costs by improving productivity, efficiency and the effectiveness of the equipment. This paper aims to identify the various factors and problems affecting the productivity of underground coal mines adopting the bord and pillar method of mining and to propose suitable measures for improving them.
Large roomandpillar stone mining fundamentals The value per ton of ore for large roomandpillar stone mines is typically low, therefore productivity must be high. Typical face areas are m wide x m high (40 ft wide by 25 ft high) with m (14 ft) pulled with each blast (Figure 1). This equates to over 1,000 tons of stone per
UNDERGROUND COAL MINING: FACTORS, COST, AND TIME CONSIDERATIONS Presented by: ... • Pillar sizes will generally range from 30 to 100 feet and have a ... – retreat mining will result in extraction ratios of up to 70%. Primary Mining Equipment Single Section • Continuous Miner one unit • Face Haulage two / three units – shuttle car
Oct 21, 2017· Tunnels are necessary to move equipment into the mineral zone. Coal is the largest portion of underground mining. It represents 60 percent of global coal production. Besides coal, underground can be used to mine gold or copper. In underground mining, there are two methods: bordandpillar and longwall. Bordandpillar
1 Coal Mining basics Coal Mining Methods Underground Bord Pillar Longwall Surface Open Cut Strip Open Pit Highwall Auger Continuous Highwall Miner Punch Bord Pillar Continuous Miner shuttle cars or continuous haulage Highly flexible, high cost – can handle geological variability per pass, but can take up to 3 passes in good
The bord and pillar mining method to be used in the mining of the Fassifern, Great Northern and Wallarah coal seams. Myuna Mine Supports Local Community Organisations The Myuna underground coal mine takes considerable pride in fostering strong ties with local Wangi Wangi community groups, some of these include the following organisations:
Jun 23, 1998· Equipment for shortwall mining useful for extraction of pillars in underground coal mines ... In general, bord and pillar depillaring is done in conventional methods with conventional equipment sometimes, intermediate technologies with side discharge loaders (SDLs) and load haul dumpers (LHDs) are being used for extraction. ...
Longwall Mining Equipment Product Line Overview. Roof Supports Customized Design is the world leader in longwall roof support technology. In the early 1970s, demanding mining conditions in German coal mines set the stage for extensive RD in roof support technology. Steeply inclined coal seams both thick and
The proposed change in the primary mining method will result in a move away from the current highervolume, mechanised bordandpillar mining method to a process involving mechanised access drives ...
Jun 30, 2015· The MC350 is part of 's comprehensive continuous mining catalog, which includes the MC250, MC430 and MC470. Continuous miners are used to develop longwall panels for coal extraction, as well as for fullscale production in bordandpillar operations. Stay connected! Follow us on Twitter and like us on Facebook
The equipment being utilized in thinseam bordandpillar layouts includes conventional equipment, loadhauldump cars (scoops), and drumtype and FairchildWilcox continuous miners. Comparisons are made of these types of equipment for bordandpillar mining .
Mining method and equipment General The bord and pillar mining layout will be maintained because of its reliability, flexibility, low capital cost, low working costs and large skills source availability (Woodruff, 1966). Increasing mechanization has resulted in .
Oct 22, 2014· Room and Pillar Mining Method 1. Hassan Z. Harraz hharraz2006 2014 2015 This material is intended for use in lectures, presentations and as handouts to students, and is provided in Power point format so as to allow customization for the individual needs of course instructors.
Room and Pillar Mining is Safe, Efficient Environmentally Friendly. Room and pillar mining is a nonsubsidence plan for a mine, preserving the precious farmland is among the safest and one of the most ecologicallyfriendly approaches to mining coal today, creating a nonsubsidence environment (no movement of land) and maintaining clean water standards.
Pillar Strength and Design Methodology for Stone Mines Gabriel S. Esterhuizen, Sr. Research Engineer Dennis R. Dolinar, Lead Research Engineer John L. Ellenberger, Lead Research Scientist NIOSHPittsburgh Research Laboratory Pittsburgh, PA ABSTRACT Underground stone mines in the United States make use of the roomandpillar method of mining.
bord and pillar mine mining ppt . design of bord and pillar method in coal mines slideshare. feb 27 to design pillar in coal mines one of such methods is the bord and pillar method of mining bord and pillar method of mining is one of the. Contact Supplier
COAL MINING IN INDIA : AN OVERVIEW 2nd INDOUS COAL WORKING GROUP MEETING WASHINGTON ... Bord Pillar with SDL, LHD; Powered support Longwall, Continuous miner. SAFETY STATISTICS in COAL MINING SECTOR (CIL) ... ¾Manufacturer of spare parts for mining equipment in India
Jun 10, 2015· Equipment selection for bord and pillar mining Slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. If you continue browsing the site, you agree to the use of cookies on this website.