room and pillar mine design of line wikipedia

2020-03-17T11:03:33+00:00
  • Underground mining (hard rock) - Wikipedia

    Pillars are left in place in a regular pattern while the rooms are mined out. In many room and pillar mines, the pillars are taken out starting at the farthest point from the stope access, allowing the roof to collapse and fill in the stope. This allows for greater recovery as less ore is left behind in pillars.

  • Get Price
  • Hard-rock room and pillar - QueensMineDesignWiki

    Room and pillar is an underground mining method that has applications to a wide variety of hard-rock deposits worldwide. It is commonly classified as an open-stoping method, meaning that development involves mining out underground cavities while leaving the

  • Get Price
  • Stoping - Wikipedia

    Room and pillar is a type of breast stoping. Timbered-stope systems Stull stoping. Stull stoping is a form of stoping used in hardrock mining that uses systematic or random timbering ("stulls") placed between the foot and hanging wall of the vein. The method requires that the hanging wall and often the footwall be of competent rock as the ...

  • Get Price
  • Longwall mining - Wikipedia

    Longwall mining is a form of underground coal mining where a long wall of coal is mined in a single slice (typically 0.6–1.0 m (2 ft 0 in–3 ft 3 in) thick). The longwall panel (the block of coal that is being mined) is typically 3–4 km (1.9–2.5 mi) long and 250–400 m (820–1,310 ft) wide.

  • Get Price
  • VENTILATION PLANNING LAYOUTS FOR LARGE OPENING

    Large room-and-pillar stone mines in the United States represent a major sector of mines in the noncoal mining industry. Numerous large room-and-pillar mines began as surface quarries, that due to increased stripping ratios or environmental considerations, have become underground mining operations.

  • Get Price
  • Mining - Wikipedia

    Mining is the extraction of valuable minerals or other geological materials from the Earth, usually from an ore body, lode, vein, seam, reef, or placer deposit.These deposits form a mineralized commodity that is of economic interest to the miner. Ores recovered by mining include metals, coal, oil shale, gemstones, limestone, chalk, dimension stone, rock salt, potash, gravel, and clay.

  • Get Price
  • AN APPROACH TO DESIGN ROOM -AND- PILLAR CLAY MINES

    (c)Pillar Sizing The design of mine pillars involves the determination of proper pillar sizes compatible with the expected load. Thus, in deciding the most suitable dimensions for mine pillars, the followings have to be considered : the pillar load (the stress on pillars), the pillar strength and the factor of safety.

  • Get Price
  • Room Pillar Mining Method - SlideShare

    Oct 31, 2019  Introduction  Room and Pillar mining method is one of the oldest existing mining methods.  A mining system in which the mined material is extracted across a horizontal plane, creating horizontal arrays of rooms and pillars.  Usually those room and pillars are uniform size  Pillars may or may not be removed after extraction.  Used for soft as well as hard rock mining and is commonly

  • Get Price
  • Hard-rock room and pillar - QueensMineDesignWiki

    Room and pillar is an underground mining method that has applications to a wide variety of hard-rock deposits worldwide. It is commonly classified as an open-stoping method, meaning that development involves mining out underground cavities while leaving the surrounding un-mined waste or

  • Get Price
  • AN APPROACH TO DESIGN ROOM -AND- PILLAR CLAY

    (c)Pillar Sizing The design of mine pillars involves the determination of proper pillar sizes compatible with the expected load. Thus, in deciding the most suitable dimensions for mine pillars, the followings have to be considered : the pillar load (the stress on pillars), the pillar strength and the factor of safety.

  • Get Price
  • Design Evaluation of Room and Pillar Workings in Gypsum ...

    Jan 01, 1987  Thus in deciding the most suitable strength, pillar load and factor of safety basic methods are available for design of dimensions for mine pillars; pillar should be taken into account. Three 1- empirical design equation 2- local experience and mine pillars. These methods are as follows: 3- numerical design,utilizing finite element methods.

  • Get Price
  • Nuttallburg Coal Mining Complex and Town Historic District

    Nuttallburg was closely associated with the Nuttallburg underground mine, a room and pillar mine that was sealed in 1958. The mine was established to develop the New River Coalfield in 1870 by John Nuttall, who correctly anticipated that the Chesapeake and Ohio Railroad would be built through the New River Gorge.When the railroad arrived in 1873 Nuttall had built almost 100 houses, with 80 ...

  • Get Price
  • Design concerns of room and pillar retreat panels ...

    Jan 01, 2017  Numerous techniques for pillar design, roof support design, and rock mass classification have been developed to assist in this type of mine planning. Pillar design programs such as ARMPS, AMSS, and LaModel based on the Mark-Bieniawski pillar strength formula have gained nearly industry-wide acceptance.

  • Get Price
  • Room Pillar Mining Method - SlideShare

    Oct 31, 2019  Design Parameters of Room and Pillar Mining Dimensions of the pillars : If the pillars are too small the mine will collapse. If the pillars are too large then significant quantities of valuable material will be left behind. The main purpose of this project is to increase the extraction ratio of Bord and Pillar workings without compromising the ...

  • Get Price
  • Pillar design in coal mines - SlideShare

    May 06, 2011  AMZ includes all of the pillars on the extraction front (or "pillar line"), and extends outby the pillar line a distance of 2.76 times the square root of

  • Get Price
  • Methods to Improve Mine Ventilation System Efficiency

    In an underground room and pillar mine, active mine workings were advancing further away from the mine shaft with deteriorated returns and leakage having a negative effect on ventilation airflows to the face. Mine level airflows were 236 m. 3 /s (500,000 cfm) and shop airflows were 24 m. 3 /s (50,000 cfm) (see Figure 1A). No additional

  • Get Price
  • EVALUATION OF BORD AND PILLAR MINING SYSTEM IN

    To review current pillar design practices in terms of pillar size, pillar shape, seam thickness, depth of mining, etc To determine the safety factor as practiced elsewhere To investigate the same in relation to a particular mine The above goal and specific objectives are achieved by

  • Get Price
  • 9 mine diagrams - Oobject

    Room and pillar method coal mine, NSW, Australia This is a good diagram showing the method of coal mining where rooms are cut out leaving some coal pillars to keep the roof up. The alternative is to advance a scaffold letting the roof fall behind.

  • Get Price
  • UFRGS

    General Mine Design Considerations Vertical benching 'llar Il Benching Of thiêker parts FIGURE 1.2 Classic room-and-pillar mining this chapter; the goal of this chapter is to summarize briefly the characteristics of the major mining methods. 1.3.2 Room-and-Pillar Mining Room-and-pillar mining is designed for flat-bedded deposits of

  • Get Price
  • Major Mines Projects White Pine North Project

    Based on geotechnical information, White Pine mine history and mineralization geometry, an underground room-and-pillar method is selected for the White Pine North deposit. This mining method allows for both a good ore selectivity and productivity. However, a series of pillars are left in place to provide roof stability.

  • Get Price
  • Mine Ventilation Systems

    b) Room and pillar systems 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 - take air courses are airways in the central

  • Get Price
  • Pillar design - SlideShare

    Jul 03, 2012  Pillar design 1. Author: Tikeshwar Mahto, Dy. Manger, RGOCP-III (SCCL)DESIGN OF PILLARS, A CRITICAL ASPECT FOR STRATA CONTROL INUNDERGROUND PILLAR MINING - A Case Study.INTRODUCTION:One of the hazards of pillar mining is the possibility of collapse of pillars in course of time.The mode of pillar failure might be either gradual or sudden.

  • Get Price
  • Nuttallburg Coal Mining Complex and Town Historic District

    Nuttallburg was closely associated with the Nuttallburg underground mine, a room and pillar mine that was sealed in 1958. The mine was established to develop the New River Coalfield in 1870 by John Nuttall, who correctly anticipated that the Chesapeake and Ohio Railroad would be built through the New River Gorge.When the railroad arrived in 1873 Nuttall had built almost 100 houses, with 80 ...

  • Get Price
  • UFRGS

    General Mine Design Considerations Vertical benching 'llar Il Benching Of thiêker parts FIGURE 1.2 Classic room-and-pillar mining this chapter; the goal of this chapter is to summarize briefly the characteristics of the major mining methods. 1.3.2 Room-and-Pillar Mining Room-and-pillar mining is designed for flat-bedded deposits of

  • Get Price
  • Room Pillar Mining Method - SlideShare

    Oct 31, 2019  Design Parameters of Room and Pillar Mining Dimensions of the pillars : If the pillars are too small the mine will collapse. If the pillars are too large then significant quantities of valuable material will be left behind. The main purpose of this project is to increase the extraction ratio of Bord and Pillar workings without compromising the ...

  • Get Price
  • Methods to Improve Mine Ventilation System Efficiency

    In an underground room and pillar mine, active mine workings were advancing further away from the mine shaft with deteriorated returns and leakage having a negative effect on ventilation airflows to the face. Mine level airflows were 236 m. 3 /s (500,000 cfm) and shop airflows were 24 m. 3 /s (50,000 cfm) (see Figure 1A). No additional

  • Get Price
  • Portland stone - Wikipedia

    Portland Stone or Portland Stone Formation is a limestone formation from the Tithonian stage of the Jurassic period quarried on the Isle of Portland, Dorset, England. The quarries are cut in beds of white-grey limestone separated by chert beds. It has been used extensively as a building stone throughout the British Isles, notably in major public buildings in London such as St Paul's Cathedral ...

  • Get Price
  • Lovilia, Iowa - Wikipedia

    Two men, including the mine foreman, were in the mine to fire the black-powder shots at the end of the work shift. Both were killed in the blast. Volunteers from Lovilia went into the mine and brought out the bodies, and then the owner of the O'Brien mine, along with three officials of a nearby mine and an employee went underground to investigate.

  • Get Price
  • EVALUATION OF BORD AND PILLAR MINING SYSTEM IN

    To review current pillar design practices in terms of pillar size, pillar shape, seam thickness, depth of mining, etc To determine the safety factor as practiced elsewhere To investigate the same in relation to a particular mine The above goal and specific objectives are achieved by

  • Get Price
  • Mine Ventilation Systems

    b) Room and pillar systems 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 - take air courses are airways in the central

  • Get Price
  • typical bord and pillar mine plan ppt - Mining

    Mar 14, 2013  Room Pillar Mine – Mine provides mining, gold Room Pillar is so named, because pillars of coal are left standing to help support the roof of the mine.A typical design would have the entry ways »More detailed

  • Get Price
  • Pillar design - SlideShare

    Jul 03, 2012  Pillar design 1. Author: Tikeshwar Mahto, Dy. Manger, RGOCP-III (SCCL)DESIGN OF PILLARS, A CRITICAL ASPECT FOR STRATA CONTROL INUNDERGROUND PILLAR MINING - A Case Study.INTRODUCTION:One of the hazards of pillar mining is the possibility of collapse of pillars in course of time.The mode of pillar failure might be either gradual or sudden.

  • Get Price
  • Underground mining (hard rock) — Wikipedia Republished ...

    Jan 14, 2021  Pillars are left in place in a regular pattern while the rooms are mined out. In many room and pillar mines, the pillars are taken out starting at the farthest point from the stope access, allowing the roof to collapse and fill in the stope. This allows for greater recovery as less ore is left behind in pillars. Ore removal

  • Get Price
  • Pillar strength in underground stone mines in the United ...

    Jan 01, 2011  The design of slender pillars in hard brittle rocks has received considerable attention in recent years , , , ; however, a widely accepted design method does not exist for pillars in stone mines. The research described in this paper had the objective to reduce the rock fall hazard and the potential for multiple pillar collapse in stone mines by ...

  • Get Price
  • UNDERGROUND COAL MINING: FACTORS, COST, AND

    bottom line Revisit Expeditious to tell you the truth (or "the truth is") 24/7 out of the loop Benchmark ... room and pillar mine • Synchronized Section ... • determination of most efficient and economical design – Ventilation requirements – Material handling requirements.

  • Get Price
  • Ground control monitoring of retreat room–and–pillar mine ...

    Jan 01, 2017  Ground monitoring instrumentation was installed in a retreat room-and-pillar mine in Central Appalachia. Cover depth above the monitored panel varied from 200 m to more than 300 m as shown in Fig. 1.Additionally, the immediate roof varied from a shale to a sandy shale with two sandstone channels in the panel.

  • Get Price