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baord and pillar method of mining

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

2017-06-01  Bord-and-pillar extractionis the older of the methods, and The word“bord” is not a misspelling of“board”, but a mining

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Bord and pillar mining – Coal and coal mining – Te Ara ...

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. Then the outer pillars were mined, leaving the roof to collapse in a controlled way as miners retreated to the exit.

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Mining Funda: Bord and Pillar method of Mining

2019-11-21  Bord and pillar mining method comprises two phases i.e DEVELOPMENT and DEPILLARING. Sometimes both these phases proceeds simultaneously. In development, pillars are formed by driving a network of galleries, of which one set is generally parallel to the dip and the other set is parallel to the strike cutting the former at right angles.

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% of extraction- board pillar mining- part I - YouTube

2019-07-30  here in this video we have discussed the numericals on PERCENTAGE OF EXTRACTION in Board and Pillar Mining.Bord and pillar mining method comprises two phases...

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Design of Bord and Pillar method in coal mines

2016-02-27  Bord and Pillar method of mining is one of the oldest methods. 3. INTRODUCTION In India, about 98% of underground output of coal is obtained by Bord and Pillar method and barely about 2% by longwall methods. The other countries where Bord and Pillar method predominates are Australia, The USA and South Africa.

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Bord and pillar mining method underground mining method ...

2019-12-17  Hi everyone, In this video we are discussing about the underground mining method , basically what is bord and pillar mining method , wha...

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Bord Pillar Method Mining Coal

2013-08-29  BORD AND PILLAR MINING METHOD Bord and pillar mining method comprises of two phases: 1. 2.

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Mining Funda: Bord and Pillar method of Mining

2019-11-21  Bord and pillar mining method comprises two phases i.e DEVELOPMENT and DEPILLARING. Sometimes both these phases proceeds simultaneously. In development, pillars are formed by driving a network of galleries, of which one set is generally parallel to the dip and the other set is parallel to the strike cutting the former at right angles.

More

Bord and pillar mining method underground mining method ...

2019-12-17  Hi everyone, In this video we are discussing about the underground mining method , basically what is bord and pillar mining method , wha...

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Design of Bord and Pillar method in coal mines

2016-02-27  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.

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EVALUATION OF BORD AND PILLAR MINING SYSTEM IN MCL

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 the pillars are too small it becomes venerable to human safety. The issues relating to the stability of pillars and effective ...

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Bord Pillar Method Mining Coal

2013-08-29  Disadvantages of bord and pillar mining method Ventilation is sluggish at the working places as compared to L/W method because of multiple connections and large no. of ventilation stoppings which provides sources of leakage. The extraction losses are generally higher than in other methods of mining.

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Bord Pillar – Mining Science and Technology

As bord and pillar workings are developed roof support becomes a major consideration and operating cost item. Support requirements vary considerably and are dependent on the physical conditions in the seam, which are often depth dependent, and the length of

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BORD AND PILLAR METHOD.pptx - Under Ground Mining Board ...

View Test Prep - BORD AND PILLAR METHOD.pptx from ENG 286 at Davidson College. Under Ground Mining Board and Pillar Method Branch : Mining and Min Surveying Engg. Presentation By : Domendra Sahu ,

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Bord and Pillar Methods. Coal, Colliery and Mining Forum.

Mining Methods and Geology. Long and Shortwall mining. Bord and Pillar Methods. Other Minerals. Opencast Mining. Geology. Rules and Suggestions. Information About Registrations. Welcome to Coal, Colliery and Mining. Suggestions. Rules. Help And How Too's. ANNOUNCEMENT> Announcements. Staff. General. Events, Gala's and Exhibitions. Undermanager's Office. Mining News. The Canteen. A

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Board Pillar? Coal, Colliery and Mining Forum.

2013-03-24  (a) board and pillar (b) pillar and stall (c) room and pillar (d) stoop and room. The name varied depending upon the part of the country the mining took place, however the method

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Pillar design - QueensMineDesignWiki

Methodology Tributary area method is the simplest method of determining the pillar load. This method is based on a force balance between the load carried by the pillar and the tributary area conveying load to the pillar. This method only uses average loading of the pillar not the actual stress distribution.

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Bord and Pillar Method of Working Coal Mining Coal

There are two basic methods of underground coal mining methods. They are i) Bord and Pillar method ii) Longwall method. Although the basic principles remain the same, there could be many variants of these two methods. In the U.K, former USSR, France and other European countries longwall method of coal mining is the main method of mining. In India, about 98% of underground output of

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Bord Pillar – Mining Science and Technology

As bord and pillar workings are developed roof support becomes a major consideration and operating cost item. Support requirements vary considerably and are dependent on the physical conditions in the seam, which are often depth dependent, and the length of

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(PDF) Success of Continuous Miner in Bord and Pillar Method

Such that, the use of continuous miner is increasing periodically, resulting in higher productivity and safe mining conditions. This paper deals with the use of continuous miner and its success in...

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BORD AND PILLAR METHOD.pptx - Under Ground Mining Board ...

View Test Prep - BORD AND PILLAR METHOD.pptx from ENG 286 at Davidson College. Under Ground Mining Board and Pillar Method Branch : Mining and Min Surveying Engg. Presentation By : Domendra Sahu ,

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EVALUATION OF UNDERGROUND COAL PILLAR DESIGN

One of such methods is the Bord and Pillar method of mining which 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 decreases leading to less profitability and if the pillars are too small it endangers the overall mine safety. Indian mines have about 60 % of the coal ...

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Digging deeper: Mining methods explained Anglo American

The underground mining methods we use include room and pillar, narrow vein stoping and large-scale mechanised mining. Room and pillar mining is a style of mining where tunnels are driven in a chess board pattern with massive square pillars between them which are gradually cut away as the work proceeds. We use this for mining coal.

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Pillar Strength and Design Methodology for Stone Mines

room-and-pillar method of mining. A prerequisite for a safe working environment is that the pillars should adequately support 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 ...

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Board Pillar? Coal, Colliery and Mining Forum.

2021-02-07  The name varied depending upon the part of the country the mining took place, however the method was basically the same. Anyone know of any other names. Hey miners, this ist Fritz from germany, pre retired from mining since 3 years from now. Germans know this item as 'room pillar', in german called 'Pfeilerkammerbau'. As a coalminer in the meantime my business has been the road

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Pillar design - QueensMineDesignWiki

Methodology Tributary area method is the simplest method of determining the pillar load. This method is based on a force balance between the load carried by the pillar and the tributary area conveying load to the pillar. This method only uses average loading of the pillar not the actual stress distribution.

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VENTILATION PLANNING LAYOUTS FOR LARGE OPENING MINES

Pillars are commonly set on 30.5 m x 30.5 m (100 ft × 100 ft) centers with 75% extraction. Roof control is typically achieved by leaving strong “roof” rock behind where available. Where mechanical rock support is required, mines use various types of rock reinforcement methods.

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Bord and Pillar Method of Working Coal Mining Coal

fBORD AND PILLAR WORKING This method is sometimes called room-and-pillar mining. It is commonly used for flat or gently dipping bedded ores or coal seams.

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Bord And Pillar Mining Working Photos

towards high productivity under a claystone roof - underground COAL. Feb 15, 2001 ... their history to find an economic mining method under these ... initially a Bord and Pillar operation and when the reserves of the .... inspector commented that the bord was about 22 ft [6.7m] wide and the working height of the coal was .... to fret and consequent rib and roof falls occurred (see Photos 1 2).

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Pillar Extraction SpringerLink

Pillar extraction, (also referred to as retreat mining; pillar recovery; stooping; pillar robbing; and bord and pillar second workings) is the practice of forming a series of pillars and then partially or totally extracting some or all of the pillars, usually with mining operations retreating out of a panel. There are a number of basic pillar extraction methods, with numerous permutations ...

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OPTIMUM UTILISATION OF CONTINUOUS MINER USED FOR PILLAR ...

The continuous miner technology in board and pillar mining is the ideal decision for achieving mass production in underground mines which does not require virgin areas; it can also be applied where development has already been done. Continuous miner technology helps in achieving high production and faster rate of extraction with safety. Continuous miners and shuttle cars combination are used ...

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typical bord and pillar mine plan ppt - BINQ Mining

Typical bord-and-pillar method 18 for the Life Of Mine Plan • Footwall Analyst – Marula Sep 2004 Ian.ppt Author: eric »More detailed. Presentation on: BEST PRACTICE IN BORD AND PILLAR HARD ROCK MINING. Presentation on: BEST PRACTICE IN BORD AND PILLAR HARD ROCK MINING bord and pillar mining for hard-rock mines Plan Mine design layout Cyclical »More detailed.

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Board Pillar? Coal, Colliery and Mining Forum.

2021-02-07  The name varied depending upon the part of the country the mining took place, however the method was basically the same. Anyone know of any other names. Hey miners, this ist Fritz from germany, pre retired from mining since 3 years from now. Germans know this item as 'room pillar', in german called 'Pfeilerkammerbau'. As a coalminer in the meantime my business has been the road

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Mining simulation for room and pillar coal

pillar method. Mechanized cycle mining using loaders and shuttle cars had its peak in the global mining industry during 1950 through 1960, but is still used in Brazil. This type of operation was used in various traditional underground coal producers such as the USA, South Africa, and Australia. Brazil is not a major coal producer in the world context; consequently the mining technologies used ...

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Mining Funda: Room and Pillar Mining

2018-05-09  Room and pillar (variant of breast stoping), also called pillar and stall, is a mining system in which the mined material is extracted across a horizontal plane, creating horizontal arrays of rooms and pillars. The ore is extracted in two phases.

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Bord And Pillar Mining Method Pdf - Praxis Lacroix

Under Ground Mining Board and Pillar Method Presentation By Domendra Sahu , Vikas Enashwari Submitted to Jeetraj sahu Branch Mining and Min Surveying Engg.. Underground Mining. Underground methods unsupported ,supported , and caving are differentiated by the type of wall and roof supports used , the configuration and size of . More Details. Pickandshovel mining Coal and coal mining Te

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VENTILATION PLANNING LAYOUTS FOR LARGE OPENING MINES

Pillars are commonly set on 30.5 m x 30.5 m (100 ft × 100 ft) centers with 75% extraction. Roof control is typically achieved by leaving strong “roof” rock behind where available. Where mechanical rock support is required, mines use various types of rock reinforcement methods.

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