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Highwall mining continues to grow in importance as a coal production method from U.S. surface mines. It may account for as much as 4 of the total U.S. coal production, according to one recent estimate. Analysis of Mine Safety and Health Administration MSHA accident and injury statistics shows . overall, highwall mining has maintained an ...
Mega Highwall Mining LLC. 12081 Virginia Boulevard, Ashland, Kentucky 41102, United States. Office 606 929-5590 Fax 606 929-5513
Dec 01, 2013 In order to extract the locked-up coal and to extend the life of some of the open pit mines those have reached their pit limit, Highwall Mining is introduced in India recently . This technology enables to extract some thin coal seams, even less than 1.0 m, otherwise un-mineable with other existing technologies 2 .
The Indian Coal Mining Industry is moving towards deeper opencast mines upto a depth of around 500m like Manuguru OC-II Extension and RG OC-II extension. In India, Lot of accidents have been occurred due to highwall slope failure table 1.1. These slope failure accidents in Indian mines have taken place due lack of sound design of slopes
Nov 26, 2010 Highwall miners of this type can advance much further into the highwall than augers, and machines are available that can mine in as far as 1,600 ft,
Highwall mining is used in open-cut coal mining operations with a continuous mining machine and a modular conveyor train being remotely driven into the exposed coal seam at the base of an open-cut highwall. The extraction process creates multiple tunnels that can extend over 500m, with supporting coal pillars left in between.
Highwall mining is seen as a promising method in India to extend the life of open pit coal mines by extracting locked-up coal from multiple seams exposed at the batters and final highwall slope. In this chapter detailed design methodology adopted for all the initial highwall mining projects viz. i Ramagundam Opencast Project-II and ii ...
operations. Wall stability accidents in open pit mines are one of the leading causes of fatalities in mining operations. Unanticipated failure of mine walls can create hazardous conditions that may endanger lives, destroy mining machinery, block roads, halt mine production and more severely, result in the full closure of the mine.
Jan 27, 2021 For opencast working or pit design, understanding the stability of slope is a prime concern for design engineers prior to or during excavation of mineral. The factor of safety is one such index, which has been extensively used for determining the stability of slopes, underground pillars, tunnel structures etc. The numerical simulation of a deep highwall slope of Ramagundam Opencast-II ...
Highwall Mining. Mouras highwall mining system was commissioned in mid-1997, BHP has estimated that by 2012 there would be 127Mt of highwall reserves at the mine. Since over 80 are held in seams that dip steeper than 6 , conventional highwall mining equipment cannot operate satisfactorily.
MINE SAFETY AND HEALTH ADMINISTRATION COAL MINE SAFETY AND HEALTH REPORT OF INVESTIGATION Surface Coal Mine Fatal Fall of Highwall May 24, 2000 MTR Surface Mine Number 1 Martin County Coal Corp. Inez, Martin County, Kentucky ID No. 15-11005 Accident Investigators Robert J. Newberry Mining Engineer Robert H. Bellamy Mining Engineer Originating ...
The highwall mining technique is widely used to extend the life of open-pit mines without disturbing the surface dwellings, while maintaining economy and productivity. In this paper, the theoretical analysis, numerical simulation and material testing methods were used to study the damage form of the false roof in Juhugeng No. 7 mine with ...
Jan 07, 2015 Reported surface coal mine highwall failures continue to concern the Mines Inspectorate. Recently a shot had been drilled and loaded in the highwall which later collapsed. This added the hazard of unexploded product requiring misfire recovery. Many events have occurred without personnel or equipment being present, however the most serious incident for some time occurred
A highwall mining equipment extraction and retrieval apparatus and method is disclosed. It includes remotely operable hydraulic cylinders fixed to the mining head and stabilizing arms which brace the mining platform against the face of a mine. Wire ropes extend from hydraulic cylinders, through channels in the pushbeams, through lockable blocks fixed to the mining platform, and onto storage ...
Bucyrus Superior Highwall System B-SHS uses open thread, steel drill sections behind a cutting bit which operates like a wood drill. Theshavings of coal are drawn out through the open drill thread. Augers suffers from increasing coal size degradation with depth. Fixed cutting height that diminish the percentage of coal recovered. extract 30 to 40 of the coal to that depth.
Highwall mining is an important surface coal mining method, and it may account for approximately 4 of total U.S. coal production. Highwall stability is the major ground control related safety concern. Ground control plans for highwall mining should specify hole width, web pillar width, barrier pillar width and number of holes between barriers.
In order to extract the locked-up coal and to extend the life of some of the open pit mines those have reached their pit limit, Highwall Mining is introduced in India recently 1. This technology enables to extract some thin coal seams, even less than 1.0 m, otherwise
Jun 09, 2015 As mining advances and mine design standards undergo operational changes, it is crucial any geotechnical assumptions be reviewed and modified by an experienced engineer or geologist to continuously ensure the integrity of the final highwall design and reduce the likelihood of highwall instability and rock-fall hazards.
In October 2014, Coalpac was denied permission to extend the area approved for open cut and highwall mining by 62 hectares and 79 hectares, respectively. The NSW Department of Planning and Infrastructure had denied an earlier proposal for expansion that asked to increase production up to 3.5 million tonnes of coal per year.
Jun 26, 2016 However, by reaching the final stage of mining in open pit mines the slope angle gets steeper and the new mining methods like highwall mining extend the final pit slope life which increases the probability of seismic activities during their life time. These circumstances cause debates about the necessity of performing seismic analysis for open ...
The Straight Creek Mine is a surface mine utilizing contour and auger mining methods.2016 MDA, p. 10. The Straight Creek surface mine includes only 0.015 million moist, recoverable tons in the Upper Jellico seam near the head of Straight Creek and is buffered by Upper Jellico underground mine works.
The mine map showed that abandoned mine workings from Long Branch Energys Mine No. 10A MSHA I.D. No. 46-07063 were located in the Upper Clarion Coal seam along the entire length of the highwall. The map indicated that the abandoned mine entries and crosscuts were developed on 70-foot centers and that secondary mining occurred in most of the ...
Selective highwall mining at the Dome Open Pit mine J.G. Henning Porcupine Gold Mines, South Porcupine, Ontario, Canada ABSTRACT Following completion of planned mining operations at the Goldcorp Dome Open Pit Mine, a high-grade Shaft Pillar located in the pit highwall was recovered. Mining
Mar 07, 2019 The highwall mining machine is owned and operated by South Fork Coal Company, LLC. It operates within the Blue Knob Surface Mine. At the time of the accident, the highwall mining machine was being operated in the Sewell A Seam, located near Rupert, Greenbrier County, West Virginia. The highwall mining machine produces 350
Broadmeadow mine prepares the highwall for long term stability after open cast mining is completed. Slope and batter angles, bench configuration and pre- spilt blasts for the final strip are all designed with the pu nch longwall end use in mind. The bottom section of the highwall is the scaled to clean the highwall of any loose material.
Surface auger mining at Rietspruit Mine Services Pty Ltd by M.J. Lukhele Paper written on project work carried out in partial fulfilment of B.Tech Mining Engineering degree Synopsis A number of high wall mining methods were developed over the years to mine coal reserves exposed on the high walls created during surface mining.
Millennium Expansion Project location, geology, and mineralisation. The Millennium mine is a premium hard coking coal and PCI coal-producing mine located within the Bowen Basin and situated approximately 22km east of Moranbah and 16km south-west of Coppabella. It is contained within Mining Lease ML 70313, ML Application 70401 and Mineral ...
Tri-Star Mining, Inc.Job No. 3 Fall of Highwall. Between 925 a.m. and 1000 a.m. on 4172007, a highwall failed resulting in the entrapment of an excavator operator and a bull dozer operator. The estimated size of the highwall that collapsed was 150 to 170 feet high by 100 to 150 feet long and approximately 50 feet thick.
Nov 15, 2012 Lipari is amending permits associated with this lease to allow for highwall mining and additional contour mining. This permitting will further diversify the product offerings, extend the life-of-mine plan for this acreage position, and provide for additional acquisition of leases.
Oct 14, 2020 Queensland Coal Mines Inspectorate has released an incident report regarding a highwall failed at a surface mining operation. The Regulator said that the incident occurred during pre-strip operations, a section of highwall failed resulting in fallen material impacting the undercarriage and counterweight on an electric shovel.
Contract Highwall Mining LLC Imperial Hollow Mine Frank Justice 18575-36 Rockholds 96,984 9 84 Blue Gem 20 0 0 0 0 Contract Highwall Mining LLC SHM-10 Maple Creek North Frank Justice 18575-30 Williamsburg 12,327 5 42 Blue Gem 18 Jellico 24 0 0 0 0 Green Hill Mining Inc GHM 40-3 Laird T Orr 12619-91 Rockholds 8,345 2 76 Jellico 20 Blue Gem 20 0 ...
Analysis of Mine Safety and Health Administration MSHA accident and injury statistics shows that, overall, highwall mining has maintained an admirable safety record. Its fatality and injury rates are comparable to those for other surface mining methods, and are significantly lower than those for underground mining.
Highwall mining continues to grow in importance as a coal production method from U.S. surface mines. It may account for as much as 4 of the total U.S. coal production, according to one recent estimate. Analysis of Mine Safety and Health Administration MSHA accident and injury statistics shows . overall, highwall mining has maintained an admirable
Jul 03, 2015 7.3.4 Highwall Mining. Highwall mining is very similar to auger mining in its concept, where the entry into the coal seam in made at the highwall of the ultimate pit limit. The difference lies in the use of a more sophisticated machine, known as a highwall miner. The highwall miner shares some common elements with a continuous mining machine.
Mining Publication Assessing and Monitoring Open Pit Mine Highwalls Keywords Hazard recognition Highwall falls Highwalls Slope stability Slopes Surface mining This page is archived for historical purposes and is no longer being maintained or updated.