The mine uses mechanised bord and pillar mining to exploit the coal. The shallowness of the No. 4 seam enables a high extraction rate and thus increased productivity. The colliery currently operates three coal processing plants, one to wash raw, primary mined coal (No. 4 seam plant), one to primary wash discard material from the mineral residue ...
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4676. 0. Bord and Pillar method: Schemes of development; design of bord and pillar working; statutory provisions; selection of equipment for development -mechanised loaders, continuous miners etc.preparatory arrangement for depillaring; statutory provision for depillaring;designing the system of pillar extraction with caving …
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3) Aashutosh Chhirolya, Design of BORD and PILLAR method in coal seams. 4) J.T. Jordaan, Bord-and-pillar mining in inclined orebodies. 5) Wikipedia: Room and Pillar Method. 6) Minewiki: Bord and pillar mining Method.
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The developed strength equation can be used to design stable pillar layouts provided the factor of safety is greater than 1.8 and the width-to-height ratio of the pillars is greater than. 0.8. The paper concludes with guidelines for applying the developed equation and selecting appropriate input parameters.
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In bord and pillar mining, a valuable amount of coal is left behind in standing pillars as primary support. According to van der Merwe and Mathey (2013), up to 9.55 Gt of coal …
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Bord-and-pillar mining has some favourable promises such as improving labour difficulties, lowering operating costs and providing safer working conditions. The success of mechanized bord-and-pillar mining in narrow tabular steep dipping orebodies will depend on the extent of the research and development efforts which need to create and innovate ...
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mining and its development correlate closely with cultural progress. Mining processes involve prospecting for ore bodies, analysis of the profit potential of a proposed mine, extraction of the desired materials. One of such methods is the Bord and Pillar method of mining. Bord and Pillar method of mining is one of the oldest methods of mining.
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Bord and pillar mining. This diagram shows the traditional method of bord and pillar mining. Miners extracted coal along roadways or bords, with the coal between the bords acting as pillars holding up the roof. The outer pillars were then mined, leaving the roof to collapse in a controlled way as the miners retreated towards the exit.
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The mine produces washed prime coking coal. The colliery is currently being operated in Seam 9 and Seam 11 employing the bord and pillar method. It should be mentioned here that the bord and pillar mining method comprises two phases, i.e. development and depillaring.
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The significance of mining to human civilization is undeniable. Mining, being one of the earliest human endeavors, and its evolution are inextricably linked to cultural advancement. Mining is the cradle of all other businesses. Different strategies have been approached for mining effectiveness while keeping output and safety in mind. The Bord and Pillar …
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Bord-and-pillar mining is applicable to horizontal to flat dipping thin tabular orebodies where the surrounding hangingwall and the ore itself are relatively competent and …
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The study deals with modern strata management, mainly strata control monitoring with analysis of roof–floor convergence, monitored induced stress, and assessment of ultimate mining-induced stress, preferably the vertical component during final extraction in a bord and pillar conventional Indian underground coal mine, …
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were larger pillar sizes and lower extraction ratios at increasing depths for bord-and-pillar layouts; the principles of support design for mechanised mining; a possible change in …
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at Everest Mine. 17 Figure 12: Pillar failure at Everest Mine after attempts to strengthen the pillars with shotcrete (Malan and Napier, 2011). 17 Figure 13: An example of a pillar which contains a prominent joint dipping at almost 45˚. This joint will have to be modelled explicitly when using a numerical modelling code (Malan and Napier, 2011 ...
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The bord and pillar method of mining is suited to work flat coal seams of average thickness and at shallow depths. Coal seams of 1.8 to 3 m thickness are best suited for this method, though the method has been successful in thinner seams also down to a thickness of 1.2 m and in thicker seams up to 4.8 m in thickness.
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Bord-and-pillar mining explained. By Ben Langford. Updated June 1 2017 - 9:14pm, first published May 30 2017 - 7:47pm. Shear size: A longwall miner in action on the coal face underground. …
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In bord and pillar mining, a valuable amount of coal is left behind in standing pillars as primary support. According to van der Merwe and Mathey (2013), up to 9.55 Gt of coal has been mined in South Africa, of which approximately 53% came from bord and pillar mines. Moolman and Canbulat (2003) assert that approximately 1.1 Gt of potentially ...
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Bord and Pillar method of mining is one of the oldest methods. The key to the successful Bord and Pillar mining is selecting the optimum pillar size. If the pillars are too small the mine will ...
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Abstract. This paper addresses the critical parameters that need to be considered when designing a mechanized bord-and-pillar mining layout for a narrow tabular steep …
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8.3.1: Room and Pillar Method. Room and pillar mining is arguably the most important underground mining method in practice today. The majority of underground production comes from room and pillar mines, and the majority of underground mines, by number, employs the room and pillar method! Think about that! Let's start out by looking at this ...
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Mining in this panel was undertaken with two, three or some-times four passes of a roadheader cutting overlapping sections of approximately 2.44 m.With this information it is believed unlikely the original pillar heights are less than 4.3 m or greater than 7.9 m, and so the fitted normal distribution is truncated at 4.0 m and 9.0 m.The …
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Bord and pillar mining. Whai muri. This diagram shows the traditional method of bord and pillar mining. Miners extracted coal along roadways or bords, with the coal between the …
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x Bord and pillar mining (also known as room and pillar mining). x Surface mining operations x Open cut mining (strip mining) o Using draglines, o Using truck and shovels, and o Using a combination of above (integrated mining systems). Mining Methods 4 x Highwall mining ...
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Shortwall mining of the developed bord and pillar workings would be a good option to overcome the limitations of the conventional bord and pillar method of mining. 3. Status of the Passang seam of Balrampur mineThe geo-mining parameters of the proposed area of the Balrampur mine for shortwall mining panel are given below.
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The paper points out that bord-and-pillar mining is the most important method of coal extraction in South African underground coal mines, and advocates that pillar design procedures should be ...
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The meaning of BORD-AND-PILLAR is of or relating to a system of coal mining in which tunnels are driven in a checkerboard pattern having massive square pillars between them which are gradually cut away as the work proceeds.
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This diagram shows the traditional method of bord and pillar mining. Miners extracted coal along roadways or bords, with the coal between the bords acting as pillars holding up …
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