A mining method for pillar extraction was introduced at the Pinoura Mine in the South Eastern Coalfields Limited of Bilaspur, India, in the year 2010. It is a valuable method for the winning of coal resulting in 75% final recovery compared to high-capital-costs methods (i.e. longwall mining) in a given geomining condition.

At present, production by longwall mining accounts for a minor amount of total underground mining production with the majority coming from bord-and-pillar methods. Since it is envisaged that longwall mining will require time to become established in India, bord-and-pillar methods will continue to be dominant in the foreseeable future. Thus, it ...

Extraction of coal pillars developed by B&P method is termed here as "Shortwall Mining" – an unique approach of mining first time in India. The mining method for coal extraction, production and productivity, strata control, mining operation is deliberated in brief.

A prediction model, developed by Central Mining Research Institute (India) for evaluation of fire risk rating of underground coal mine panels in bord and pillar working in respect of their ...

Indian mining engineers which constitutes more than 50% deeper deposits. 2. A portion of deposits with their seam thickness in Indian deposits (Rakesh et al.) ... 2.1.1 Bord and Pillar Based systems: Multi stage/slicing was a variant of …

1 Depar tment of Mining Engineering an d Chairman, JEE-ISM, Indian School o f Mines, Dhanbad-82 6004, Jharkhand, India. 2 Indian School of Mines, Dhanbad, India.

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.

2.1. Problems associated with mining of thick coal seams Following problems are associated with thick seam mining 1) Difficulty in strata control and its monitoring. 2) Risk of overriding of pillars leading to premature collapse ( in case of bord and pillar workings) 3) Low percentage extraction, usually < 50% when extraction is done by bord ...

Of the total output of coal from underground mines, more than 90% of coal is obtained by the bord and pillar method, the predominant method of mining followed in …

2.Page | 1 1. P a g e | 1 ABSTRACT: Indian Coalfields are limited to the states in the eastern side of the country where large numbers of seams are closely held together with varying partings of as little as 3 …

Rib-stability. Numerical modeling. Bord & pillar method. Underground coal extraction. 1. Introduction. Majority of coal reserves in India are amenable to underground mining. The government of India (GoI) has an ambitious plan to increase underground coal production from 35 Mt/year (current) to 100 Mt/year (by 2019).

Bord and Pillar method of underground mining has been used extensively to develop Indian coal seams into pillars and galleries. This results in only 20-30% recovery of coal and rest coal remain ...

are about 95, 33 and 20% respectively, India produces only about 15% of coal from underground mines (Prasad 2009). Of the total output of coal from underground mines, more than 90% of coal is obtained by the bord and pillar method, the predominant method of mining followed in India, and the rest is mined by the longwall mining method.

Indian geo-mining scenario of coal pillar extraction is provided. Status of bord and pillar mining for deep coal seams is reviewed. Inherited instability issues of …

4/16/2013 1 BORD AND PILLAR METHOD APPLICABILITY OF BORD & PILLAR METHOD • A seam thicker than 1.5 m. • A seam free from stone or dirt bands. ... Classification of Bord and Pillar Mining System ... Size of Pillars • In India, the dimensions of pillars andthe width and height of galleries areregulated by Regulation 99 of Coal ...

In India, more than 3000 million ton of coal reserve is locked up in the form of coal pillars. Varying geo-mining conditions make it extremely difficult to extract more than 30% of the total coal ...

Bord and Pillar method of underground mining has been used extensively to develop Indian coal seams into pillars and galleries. This results in only 20–30% …

The laboratory mine model kept at 4.2° because most of the Indian coal mines are kept the mine inclination between 4 and 5°. The complete transparent rectangular model is fabricated with water-tight joints. The mine prototype is based on bord and pillar mine because most of the Indian underground coal mines follow the bord and pillar mining ...

Indian co alfields, w here caving is p racticed, 60-90 m 2. ... [12] Sri Ram Chandra Nay ak, "Evaluation of bord and pillar mining sy stem in . M CL coal mines", NIT Rourkela, 2010.

The continuous miner is used both for development and depillaring in bord & pillar panels. In view of fast ... Since nationalization in 1973, the Indian coal mining industry has shown a phenomena ...

than 90 % of coal is o btained by t he bord and pillar method, the predo minant method of mining followed in India, and the rest is mined by the lo ngwall mining met hod.

The Bord and Pillar method of mining is one among them. One of the earliest methods of mining is the Bord and Pillar method. The most important aspect of successful Bord …

In India, bord and pillar is the most dominant method of underground coal mining. Liquidation of thick coal seams by this method have fraught with various geotechnical problems like failures of strata around slices, premature collapse of …

Bord and pillar working with LHD/SDL - Download as a PDF or view online for free ... Equipment selection for bord and pillar mining. Read more. Ankit Narain Training at BCCL, Dhanbad. ... Highwall …

Bord and Pillar mining is one of the widely preferred methods of coal extraction in India. Prior to the development of continuous mining technology, the mining cycle was composed of undercutting the coal, drilling, blasting and loading. This non cyclic method suffers from poor productivity. With the introduction

Chronological development in coal pillar design for bord and pillar workings: A critical appraisal M. Jawed1*, R. K. Sinha2 and S. Sengupta3 1Department of Mining Engineering and Chairman, JEE-ISM, Indian School of Mines, Dhanbad-826004, Jharkhand, India. 2Indian School of Mines, Dhanbad, India. 3National Institute of Rock Mechanics, India.

antiquity and ease of operation, the Bord and Pillar technique of mining is most commonly used in Indian underground mines. One of the earliest methods of mining is the Bord and Pillar method. The key to Bord and Pillar mining success is choosing the right pillar size. Before building an underground coal mine pillar, the mineral resource must ...

Introduction. In India, underground coal production is mostly dependent upon the conventional bord and pillar (room and pillar) method of mining, although the overall output per man shift (OMS) through this method is generally not more than 1. ton in any of the mines [1].. Large areas in all the subsidiaries of Coal India Limited and even in …

However, in India in some cases the depth of mining by bord and pillar method has been around 600 m, though mining at such depths is beset with the problems of strata control. Sometimes, low strength of coal limits the depth to which bord …