During the early years of coal mining over 90% of South Africa s coal was produced by underground bord and pillar mining Mohutsiwa and Musingwini 2015 However one of the biggest disadvantages of this method is its relatively low extraction ratio an average of just less than 50% across all collieries in South Africa Madden et al 1995
MINING METHODS UNDERGROUND COAL INTRODUTION TO UNDERGROUND COAL MINING Classify Underground Coal Mining Methods Method of winning coal in underground mines are classified into two main categories 1 Bord and pillar also known as pillar and stall and its modification 2 Longwall i Advancing ii Retreating
It s a combination of both longwall retreating and bord and pillar B&P mining which is operated for the extraction of standing coal pillars developed in bord and pillar mining layout The extraction of such pillars is with the help of PSLW equipment similar to long wall retreating method
In 2013 a Bord and Pillar Task Team was established by the Department of Mineral Resources DMR Principal Inspector of the North West Region to determine current industry best practice for bord and pillar mining Platinum Task Team 2013 It was found that there was a variation in the methodologies used to design bord widths but
extraction in a Bord & Pillar conventional Indian underground coal mine Govinda Colliery a mine of South Eastern Coal Fields Limited SECL Coal India
Crsine HTML Template For Car Services FH125 D Face Hauler Caterpillar uses the same model axle in the hopper unit as used in the tractor unit with 90 degree transfer boxes mounted on the axle and wheel ends and are connected by a solid drive shaft make Cat diesel face haulers a safe and powerful solution for your room & pillar operations
Mandalong Mine is an existing underground coal mine operation Mandalong utilise a combination of longwall and continuous mining methods to extract coal from the West Wallarah Seam Mining activities are • The use of bord and pillar methods in the Wallarah Great Northern and Fassifern coal seams; • The continued use of ancillary
Download citation Pillar design in coa 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 refined to
Nowadays WSN technique is widely used to detect the fire in underground coal mines Bhattacharjee et al P10 2012 presented a WSN based early fire monitoring system for bord and pillar coal mines Sensor nodes were used to locate the position of fire and it s spreading direction in underground mine
Present average cost of coal production from underground mines in India with traditional Bord and Pillar method of mining semi mechanized with SDLs/LHDs and outbye transport of coal by belt conveyor through inclines is more than Rs 4500/ Per tonne of output and almost all underground mines being operated with this technology are in loss only
Anglo American Platinum currently has underground mechanized mining methods at a small percentage of its mines These methods are • Bord and pillar m m stope widths using low profile LP mechanized equipment • Breast mining m stope width using extra low profile XLP mechanized equipment
In underground mining first and foremost in the modernization process are the machines that extract coal primarily the continuous and longwall miners First introduced in the late 1940 s continuous miners provided a quantum
Room and pillar s R&P method of underground mining is the most common method used in India In this extraction method untouched coal pillars of large dimensions are left to support the overlying strata leaving open areas rooms and galleries for the mobility of workers and various mining equipment
an underground Bord and Pillar coal mine that has limited coal reserves and unfavorable geological conditions The mine consists 10 CM sections mining both high and low seams with equipment suits that Bord and pillar equipment suit The mine has a strategy of mining the higher seam mining suit and lower seam mining suit for both the North
In underground coal mining room and pillar is one of the oldest methods used for the extraction of flat and tabular coal seams In this method a series of rooms are driven in the solid coal using continuous miner and generally Shuttle cars and pillars are formed in the development panels interruptions in the mining operations equipment
Pillar extraction is back on the agenda again and NEPEAN Longwall is proving the coal mining doubters wrong with an ambitious and innovative project that it says may lead to an industry step change prolonging the life of underground operations by supplying a system that combines elements of both longwall and room & pillar mining methods
Today suspended monorail transport is the most efficient and cost effective way of transporting people equipment and materials in underground mining environments December 11 2020 Share Copy Link; Share on X monorail systems are used increasingly widely in coal mining as well as in ore mines Indeed monorail systems are fast becoming
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 The Indian coal
Chikande et al 2022 created and implemented a ventilation on demand VOD system for the bord and pillar mining method at a platinum mine in Zimbabwe to reduce the usage of excess air in the
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 The Indian coal
workings Study and analysis of the stress distribution around development workings in coal mines is conducted through numerical model Accident Statistics of Indian Underground Coal Mines India has large resources of coal deposits for underground mining & lot of coal was blocked in existing underground mines
Abstract This paper investigates the applicability and operational characteristics of different partial pillar extraction methods for a room and pillar coal mining project located in the region of southern Africa Three partial pillar extraction methods the Pillar Splitting method the Duncan method and the Lift Left Right method are evaluated using three dimensional finite
This paper attempts to study efficiency and productivity of coal mining in the Indian coal sector using detailed input and output data for underground and opencast coal mining for the period
The only way to achieve this is to reduce production costs by improving productivity efficiency and the effectiveness of the equipment This paper aims to identify the various factors and problems affecting the productivity of underground coal mines adopting the bord and pillar method of mining and to propose suitable measures for improving them
