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Bord-and-pillar mining in inclined orebodies

This methodology was then applied in the design of a mechanized bord-and-pillar 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.

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Bord-and-pillar mining explained Illawarra Mercury ...

01/06/2017  Bord-and-pillar mining is used in first workings of a deposit, and when irregularly shaped deposits, or sensitive environmental conditions, call for a lighter touch. This method is used at ...

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EVALUATION OF BORD AND PILLAR MINING SYSTEM IN MCL

Bord and Pillar method of mining. 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

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bord and pillar mining conveyor methodology

bord and pillar mining conveyor methodology. mining methods - CMPDI . face conveyors and belt conveyors for coal Conventional bord and pillar mining in thick Dipillaring layout and LHD tramming in Blasting Gallery Method get price. Mining Technology. two methods of underground mining in the West: 1) room nology in the West—room-and-pillar mining .. mining face, a conveyor system that runs ...

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Design of Bord and Pillar method in coal mines

27/02/2016  BASIC PRINCIPLE OF BORD AND PILLAR METHOD 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 nearly at right angles to the first set. The stage of formation of a network of roadways is known as development or first working. And these roadways are called BORD

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Bord-and-pillar mining explained Illawarra

Bord-and-pillar mining is used in first workings of a deposit, andwhen irregularly shaped deposits, or sensitive environmental conditions, call for a lighter touch. This method isused ...

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EVALUATION OF BORD AND PILLAR MINING SYSTEM IN MCL

Bord and Pillar method of mining. 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

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Bord Pillar – Mining Science and Technology

Rules and Procedures for BLS operation Only the miner driver and one other workman shall stand between the miner the BLS’s position whilst the lift is being taken. Only one BLS to be lowered and moved at any one time. Always lower the rear legs first to allow any [] Read More. 1.

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(PDF) Success of Continuous Miner in Bord and

Generally, bord pillar section use one continuous miner and two electric/diesel/batter y shuttle cars traveling between the miner and the Feeder breaker. One Quadra boom Roof bolter

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Pillar Strength and Design Methodology for Stone Mines

the overburden and the pillar ribs and rooms should remain stable during mining. At present pillar dimensions are either based on experience at neighboring mines or on strength equations that were developed for metal or non-metal mines. This paper presents a pillar design methodology that was developed from a

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Room and pillar mining - Wikipedia

Room and pillar, is a mining system in which the mined material is extracted across a horizontal plane, creating horizontal arrays of rooms and pillars. To do this, "rooms" of ore are dug out while "pillars" of untouched material are left to support the roof overburden. Calculating the size, shape, and position of pillars is a complicated procedure, and is an area of active research. The technique is usually used for

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Bord and pillar working with LHD/SDL - SlideShare

10/06/2015  Bord and pillar working with LHD/SDL 1. Bord and Pillar development/depillaring with LHD/SDL 2. LOAD HAUL DUMPER 3. Applicability Condition • Seam Thickness : more than 1.8m • Average seam Gradient : up to 1 in 7 • Suitable for weak floor as compared to SDL • Maximum speed 8-12 KMPH • Suitable for long distance 4.

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ANALYSIS OF SUBSIDENCE AND STABILITY OF PILLARS IN A

nearly with social progress. One of underground mining methods is the Bord and Pillar Method of Mining and this method is one of the oldest Mining Methods. By the help of Bord and Pillar Mining, extraction will be high. The key to successful Bord and Pillar Mining is selecting the optimum pillar size and stability of the pillar.

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Productivity Improvement in Underground Coal

01/01/2013  It should be mentioned here that the bord and pillar mining method comprises two phases, i.e. development and depillaring. In the development phase, a series of narrow headings known as “bords” or “galleries” are driven into the coal seam parallel to each other along the dip direction which are cut across at right angles by another series of headings driven along the strike and thus forms the

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CHAIN PILLAR DESIGN – Mining Science and

The strata load from above the extracted longwall panel is transferred from the longwall panel to the adjacent chain pillar(s), this is shown in the diagram below. Once the second adjacent longwall panel has been extracted, the chain pillars are subjected to extremely high strata loads. In most situations the pillars will collapse after the second longwall panel has been extracted. This reduces the irregularity of

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Bord-and-pillar mining explained Illawarra

Bord-and-pillar mining is used in first workings of a deposit, and when irregularly shaped deposits, or sensitive environmental conditions, call for a lighter touch. This method is used at ...

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bord and pillar mining conveyor methodology –

bord and pillar mining conveyor methodology [ 4.8 - 4464 Ratings ] The Gulin product line, consisting of more than 30 machines, sets the standard for our industry. We plan to help you meet your needs with our equipment, with our distribution and product support system, and the continual introduction and updating of products. Related Posts » small scale business of stone crusher in mozambique ...

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EVALUATION OF BORD AND PILLAR MINING SYSTEM IN MCL

The key to the successful Bord and Pillar mining is selecting the optimum pillar size. 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 reducing the profitability of the mine. The percentage of . 6 material mined varies depending on many factors, including the material mined, height of the ...

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Room and pillar mining - Wikipedia

Room and pillar (variant of breast stoping), is a mining system in which the mined material is extracted across a horizontal plane, creating horizontal arrays of rooms and pillars. To do this, "rooms" of ore are dug out while "pillars" of untouched material are left to support the roof overburden.Calculating the size, shape, and position of pillars is a complicated procedure, and is an area of ...

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Pillar Strength and Design Methodology for Stone Mines

during mining. At present pillar dimensions are either based on experience at neighboring mines or on strength equations that were developed for metal or non-metal mines. This paper presents a pillar design methodology that was developed from a study of pillar performance in operating stone mines. Data were collected that describe the rock mass quality, pillar conditions, mining dimensions and ...

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PRODUCTIVITY IMPROVEMENT IN UNDERGROUND COAL MINES

productivity improvement; lean manufacturing; underground coal mine; bord and pillar mining method; side discharge loader (SDL); lead distance 1. INTRODUCTION India has emerged as the third largest coal producer in the world after China and USA with a 9% share of the total glo-bal coal production. While the coal production from under-ground mining in countries like China, USA and Australia are ...

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Bord and pillar working with LHD/SDL - SlideShare

10/06/2015  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.

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PBE Mining Process - PBE Technologies Pty Ltd

Significantly less capex than longwall mining, similar capex to bord and pillar mining. Low Operating Cost. Similar low operating costs to longwall mining, significantly less than bord and pillar. High Productivity. Continuous mining process, low manning levels, automation and remote activities . Ability to Mine around Geological Constraints. Able to relocate easily from one mining area to ...

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Defining a representative overall equipment effectiveness ...

bord and pillar coal mining, even though many manufacturing and production businesses use OEE as a primary performance metric to measure plant performance. By defining some robust OEE guidelines for different types of manufacturing and production businesses (which ought to include underground coal mining), OEE can be used to compare the overall effectiveness of the equipment used in diverse ...

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DESIGN OF SUPPORT SYSTEM IN BORD AND

05/12/2016  DESIGN OF SUPPORT SYSTEM IN BORD AND PILLAR MINE 1. DESIGN OF SUPPORT SYSTEM IN BORD AND PILLAR MINE A Project Report Submitted in partial fulfilment of requirements for award of dual degree of Bachelor of Technology and Master of Technology in Mining Engineering By Anurag kumar jha Exam Roll no.-511214025 SESSION 2016-2017 DEPARTMENT OF MINING

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bord and pillar mining conveyor methodology –

bord and pillar mining conveyor methodology [ 4.8 - 4464 Ratings ] The Gulin product line, consisting of more than 30 machines, sets the standard for our industry. We plan to help you meet your needs with our equipment, with our distribution and product support system, and the continual introduction and updating of products. Related Posts » small scale business of stone crusher in mozambique ...

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Bord and pillar working with LHD/SDL - SlideShare

10/06/2015  Bord and pillar working with LHD/SDL 1. Bord and Pillar development/depillaring with LHD/SDL 2. LOAD HAUL DUMPER 3. Applicability Condition • Seam Thickness : more than 1.8m • Average seam Gradient : up to 1 in 7 • Suitable for weak floor as compared to SDL • Maximum speed 8-12 KMPH • Suitable for long distance 4.

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PREVIOUS AND CURRENT MINING METHODS.

Mining method and equipment 4.2.1 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

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ANALYSIS OF SUBSIDENCE AND STABILITY OF PILLARS IN A

nearly with social progress. One of underground mining methods is the Bord and Pillar Method of Mining and this method is one of the oldest Mining Methods. By the help of Bord and Pillar Mining, extraction will be high. The key to successful Bord and Pillar Mining is

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Bord and Pillar Coal Cutting Machine ~ Mining

22/01/2014  Coal cutting machine is used in bord and pillar mining method of underground coal mining to make Undercut, Overcut or Middlecut to provide free face for the blasting operation. Development by CCM: The headings are Undercut, Overcut or Middle Cut by a coal cutting machine and shot holes are then drilled and charged with explosives and blasted. Blasted coal is hand loaded on to scraper chain conveyors which transport the coal from the face to a central belt conveyor.

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Continuous miner - SlideShare

09/04/2016  Bordand Pillar Method Fundamentally, the bord and pillar method of mining coal seams involves the driving of a series of narrow headings in the seam parallel to each other and connected by cross headings so as to form pillars for subsequent extraction, either partial or complete, as geological conditions or necessity for supporting the surface, may permit. Ideally, the pillars should be square but

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University of Wollongong Research Online

Clarence Colliery uses essentially a bord and pillar mining method, using partial extraction. The partial pillar extraction design maximises coal resource recovery without fracturing the over burden. Clarence mitigates ground water inflow and disturbance to aquifers,

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Overall equipment effectiveness optimisation for a ...

The two types of underground coal mining are the conventional mining system and continuous mining system. Continuous mining is the most common form of underground coal mining method and accounts for about 60% of world production (Hancox and Gotz 2014). The mechanized machine used on a Bord and Pillar operation is a continuous mining machine. The CM is a self-propelled machine that cuts into

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CASE STUDY OF CONTINUOUS MINER ALONG WITH ROOF BOLTER

In this mechanization continuous mining method is one. This method utilizes the continuous miner with a large rotating steel drum equipped with tungsten carbide teeth that scraps coal from seam. Continuous miner not only cuts the coal but also fed the coal onto conveyor. It is generally used in room and pillar mining. Now a day’s remote-

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Longwall Mining Method, Types, Support, Shearer

mining papa is a website of mining education. There is not much information available in Hindi for studying mining in India. Many books provide different information, which creates a lot of confusions.To solve this problem, I created this website so that mining students who want to study in Hindi, They can get a platform .This is just my ...

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