bord and pillar coal mining


  • Bord and Pillar mining by continuous Miner in HINDI - YouTube

    Jul 29, 2016· Bord and pillar is an underground mining method for extracting coal from belowground of earth. Various machinery combinations are used for extracting. One of the combination is the continuous ...


  • Coal Mining Methods - EMFI

    Coal Mining Methods Underground Mining Longwall & Room and Pillar Mining Longwall mining and room-and-pillar mining are the two basic methods of mining coal


  • (PDF) Underground Mining Methods: Room and Pillar method

    Underground Mining Methods: Room and Pillar method ... Characteristics of R & P method in non-coal applications R & P classic Step mining Post-pillar mining Configuring the R & P method in coal ...


  • The Duncan Method of Partial Pillar Extraction at Tasman Mine

    remnant coal pillar. The system of partial extracti on has been successful in delivering safety, productivity and subsidence targets. INTRODUCTION Tasman Mine is an underground bord and pillar mine owned and operated by the Donaldson Coal Pty Ltd located 20 km west of Newcastle, NSW (Figure 1). The mine commenced in 2006 and secondary


  • Ensham Resources - Idemitsu

    The Underground is a bord and pillar operation with five production units producing coal and sending it to the surface stockpile via a series of conveyor belts. The coal is transported from the stockpiles using large road trains to the coal plant where it is crushed and screened for size and then transported via rail to Gladstone Port for shipping.


  • Subsidence risk assessment of decommissioned bord-and ...

    Underground mining of coal results in voids with remanent pillars to support the overlying strata. Failure of any individual pillar overloads adjacent pillars and may result in failure propagation with damaging surface subsidence.


  • Pillar design in coal mines - SlideShare

    pillar design in coal mines, different pillar design approaches, salmon versus sheorey formulae, panel stability, diffrent approaches, local mine stiffness Slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising.


  • Bord and Pillar mining by continuous Miner in HINDI - …

    Jul 29, 2016· Bord and pillar is an underground mining method for extracting coal from belowground of earth. Various machinery combinations are used for extracting. One of the combination …


  • Design of Bord and Pillar method in coal mines - …

    BASIC PRINCIPLE OF BORD AND PILLAR METHOD When the gallery are developed a solid block of coal is left sourrounded the gallery are known as PILLAR. The coal pillars formed are extracted after the development of the mine leasehold and this later stage of extracting coal from pillars is known as depillaring.


  • Room and pillar mines, Mining Techniques, Underground ...

    Room and pillar. Room and pillar is also known as bord and pillar is a mining system in which the mined material is taken out across a horizontal plane while leaving "pillars" of unscathed material to support the overstrain leaving open regions or "rooms" underground.


  • Bord and Pillar Method-Handouts | Coal Mining | …

    • In the present scene of underground mine development by Bord and Pillar system, mostly square pillars are being formed of size dictated only by depth and width of galleries under the Coal Mine Regulations.


  • Mine Ventilation Systems

    Mine Ventilation Systems 1. Mine System and Control Devices ... Figure 9-4 shows the two methods of ventilating a room and pillar development panel in a coal mine where multiple entries are driven. Figure 9-4a is the directional, or W-system, in which in -


  • Room and pillar mining - Wikipedia

    This diagram shows the traditional method of bord and pillar mining. Miners first extracted coal along roadways or bords, while the coal in between the bords acted as pillars holding up the roof.


  • Defining a representative overall equipment effectiveness ...

    Defining the characteristics of an underground bord and pillar mining process If the characteristics of a typical batch manufacturing process (Hill, 2000) are applied to the underground bord and pillar coal mining process, it becomes clear that the bord and pillar process can be categorized as a typical batch process. As part


  • NSW Mining Methods - NSW Mining

    Bord-and-pillar: Bord-and-pillar, or room-and-pillar, is the oldest underground mining technique and was common in NSW before longwall mining began in the 1960s. This method uses a grid of tunnels and involves progressively cutting panels into the coal seam whilst leaving behind pillars of coal to support the mine.


  • Room-and-pillar mining | coal mining | Britannica.com

    In coal mining: Development of continuous mining …loading, developed in association with room-and-pillar mining. The oldest of the basic underground methods, room-and-pillar mining grew naturally out of the need to recover more coal as mining operations became deeper and more expensive.


  • Bord & Pillar Pet Resort

    Daycare: Coal Mine Camp ... She has recently retired from the building industry and is focusing all of her efforts on Bord and Pillar Pet Resort and Spa. In her 20's she had a career working with Hunter/Jumpers on the A Show Circuit both in Washington and California. She trained, showed and professionally groomed horses for the show circuit.


  • Toward Pillar Design to Prevent Collapse of Room-and ...

    TOWARD PILLAR DESIGN TO PREVENT COLLAPSE OF ROOM-AND-PILLAR MINES R. Karl Zipf, Jr. ... Table 1 – Value and production by room-and-pillar mining in the United States Commodity Total U.S. production, Room-and-pillar mining Typical ... coal mine failures, usually much less than 1 in metal-mine


  • Bord and Pillar Method, Mine Ventilation, by OcS (

    May 07, 2013· This video is a chapter in the e-learning course offered by Octave Simulation Services Pvt. Ltd. () on Mine Ventilation Systems.


  • Pillar design incoalmines - SAIMM

    of bOld-and-pillar mining methods are widened to a coal-to-waste ratio of1:5and40percentlostcoal,then almost 63per cent ofthe country's coal reserves fall ... conventional bord-and-pillar mining layout that has been designed at a high safety factor. Local-support


  • Bord and Pillar Method of Working | Coal Mining | Mining

    The development of mine by the method of working known as Bord and Pillar consists of driving a series of narrow roads, separated by blocks of solid coal, parallel to one another, and connecting them by another set of narrow parallel roadways driven


  • Continuous Miner | Bord & Pillar

    Continuous miners operate a room and pillar mining system. A series of 18 to 20 foot wide rooms are driven in the coalbed with pillars or columns of coal left standing to help support the roof. Roof bolts, typically four to six feet long steel bolts, are inserted into holes bored into the roof to bind the strata together support the roof.


  • Continuous Miners For Cutting Coal & Soft Materials ...

    MC470 continuous miner is the ideal choice for room and pillar coal mines, salt and potash mines, and other operations that demand the highest cutting force. The miner effectively integrates proven technologies to offer high advance rates under tough mining conditions and in restricted spaces.


  • Coal mining - Wikipedia

    Most coal seams are too deep underground for opencast mining and require underground mining, a method that currently accounts for about 60 percent of world coal production. In deep mining, the room and pillar or bord and pillar method progresses along the seam, while pillars and timber are left standing to support the mine roof. Once room and pillar mines have been developed to a stopping ...


  • Bord and Pillar Method-Handouts | Coal Mining | Explosion

    • In the present scene of underground mine development by Bord and Pillar system, mostly square pillars are being formed of size dictated only by depth and width of galleries under the Coal Mine …


  • Method Overview | Bord & Pillar

    The fundamental concept of bord and pillar methods of mining is that the coal seam is divided into a regular block like array by driving through it primary headings which are intersected at regular intervals by connecting cutthroughs.


  • EVALUATION OF UNDERGROUND COAL PILLAR DESIGN

    mining include Longwall mining and Bord and Pillar method of mining. The method mostly prevalent in the Indian underground mines is the Bord and Pillar method of mining because of its history and ease of operation. The most important aspect of Bord and Pillar mining …


  • Board & Pillar? | Coal, Colliery and Mining Forum.

    Mar 24, 2013· Pillar width, length and bord width are worked out according to geology, ie, seam stresses and seam depth. Rock mechanics and the Mine Manager work those out according to local conditions, ie depth from the surface and type of mineral.


  • Subsidence from Underground Mining: Environmental …

    Generalized sketch illustrating subsidence over longwall mining _____ 6 6. Aerial photograph showing the surface effects of past and present room-and-pillar coal mining along the


  • Mining Methods - Lithgow Environment Group

    Longwall mining increases coal retrieval rates by up to 60% more than bord and pillar methods. The typical longwall panel can take a year to mine. When the coal panel is being mechanically cut, the strata above the advancing machine-cutter are propped up …


  • Coal pillar design procedures - Mine Health and Safety ...

    Coal pillar design procedures G. York, I. Canbulat, B.W. Jack ... 3 Life and design of bord and pillar workings affected by ... depict pillar scaling when the scaled coal piles from neighbouring pillars do not come into contact at the bord centres.....85 Figure 3-3 Plan (a) and section (b) show maximum pillar scaling when the scaled ...


  • Pillar Extraction using Continuous Miners - underground COAL

    pillar extraction using continuous miners Overview Now that longwall equipment has been developed to a stage where it is able to cope with most conditions satisfactorily, longwall mining is the most widely used method of secondary extraction.