Other highwall applications include previously augered areas and trench mining. On june 27, 2016, a 61year old mine superintendent, with 24 years of experience, was killed at a limestone quarry in arkansas. Ivan rilski sofia 1700, bulgaria university of mining and geologyst. Studying the method of mining of highwall mining systems hms krastu dermendjiev alexander slavov university of mining and geologyst. Msha compliance information procedure instruction letters. Portable auger and highwall coal mining operations are subject to requirements applicable to mine operators. However, there are geotechnical considerations with highwall mining that require careful engineering to realize the full economic and safe potential of highwall mining. Studying the method of mining of highwall 50 years university of mining and geology st. Highwall safety pdf files browse our collection of highwall safety files in pdf format. Capable of full operation with a three to fourman crew, the cat highwall mining system.
The various methods of mining a coal seam can be classified under two headings, surface mining and underground mining. Maximum extraction low cost coal to traditional mining methods. The hazards of operating mobile plant in proximity to edges of highwalls at open cut coal mines was highlighted when an 85 tonne excavator slipped over theedge of a highwall. Addcar systems llc is an international highwall mining hwm specialist based in ashland kentucky, usa with over 25 years experience operating hwm systems. And christopher mark highwall mining continues to grow in importance as a coal production method from u. Commonwealth mining llc is a highwall mining services co. Aai personnel have the highwall mining experience and expertise to optimize coal recovery while promoting safety at your coal property. It appears that upwards of 60 highwall miners are presently in operation, and they may account for. Highwall mining is another form of mining sometimes conducted to recover additional coal adjacent to a surface mined area. Designs for highwall safety bunds in open cut coal mines. Welcome to cdc stacks analysis of practical ground. Geotechnical issues on application of highwall mining system. Specalog for hw300 highwall mining system aehq680201. The highwall mining machine stands on the pit floor or on a bench, directly in front of the exposed seam and makes.
The caterpillar team uses an evaluation of your geological data and site plan to determine how best to use a cat highwall mining system. Temporary highwall bunds are required for safety during open cut mining prior to the infilling of pits, and permanent highwall safety bunds are necessary to prevent public access to abandoned open cut final voids. The system can produce 40 000110 000 tonnes 44,000 to 121,000 tons of coal per month, depending on seam height. What is highwall miningmining coal from a visible, horizontal or inclined coal seam, making rectangular, parallel, unsupported entries, with unmanned cutter head and coal transport system, which is remotely controlled from a mining unit positioned outside the drive, in front of highwall. The selfcontained cat highwall mining system offers an innovative method for extracting coal from exposed seams in a multitude of applications. I learn manythings,better to appear foral before dgms. It appears that upwards of 60 highwall miners are presently in operation, and they may account for approximately 4% of total u. Highwall mining is an important surface coal mining method, and it may account for approximately 4% of total. Select up to three search categories and corresponding keywords using the fields to the right. Some considerations of highwall mining systems in coal mines.
Mine fatality when truck rolls from highwall aggregate. Surface mining can be classified into two groups on the basis of the method of extraction. Application of highwall mining system in weak geological. December 2018 potential fall of excavator over highwall. Operator comfort the airconditioned cab offers an ergonomic. The highwall mining method originated in the usa in the 1940s. Application of highwall mining system in weak geological condition. Safe operation the entire mining cycle is completed by a three or fourman crew, with no personnel going underground at any time. Cat highwall mining system the industryleading cat highwall mining system is a new, lowcost addition to traditional mining methods. In order to increase coal recovery of open pit coal mines,the application of a highwall mining system for residual coal around the endwalls is proposed. Mining induced strata movement and roof behavior in underground coal mine mining induced strata movement. An optional rightangle conveyor system discharges coal on the right or left side on narrow benches. Although the affected area was the entire highwall mining pit, the order was modified to allow the use of heavy equipment to assist in the recovery effort. This workbook is designed to take those principles from the.
The code of federal regulations cfr is published and updated annually by the office of the federal register. The highwall mining machine stands on the pit floor or on. Analysis of highwall mining stability the effect of. The use of highwall mining systems has increasingly come into play in. Application of highwall mining system to recover residual. Professional highwall mining services, llc was formed in 20 and the company has seen steady growth. Hw300 highwall mining system your local cat dealer in co. The cat highwall mining system is a strong, selfpropelled machine that operates on contour benches as narrow as 18 m 59 ft. Extracting coal affordably and safely highwall mining is a proven primary method for mining coal from exposed seams.
Msha rules are in title 30 of the cfr, mineral resources, chapter i. In this method of mining, an unmanned cutter module is driven underground and operated in front of the highwall. Analysis of retreat mining pillar stability highwall mining armpshwm 8. Instead of an auger hole, an entry into the coal seam is made by a continuous miner, remotely operated from a cabin at the surface.
Jul 15, 2010 thanks for such valuable presentation on highwall mining,the new concepttechnology in mining industry. Highwall mining is a proven primary method for mining coal from exposed seams. The company services a total of 16 highwall miners from of a total of 40 machines working in the us and the number. The effect of highwall mining and augering needs to be considered for longterm highwall performance.
Highwall miners and american highwall systems have been introduced in the us highwall. Highwall stability is the overriding concern in highwall mining. Ground control plans for highwall mining should specify hole width, web pillar width, barrier pillar width and number of holes between barriers. Mar, 2012 high wall mining technology highwall mining is a remotely controlled mining method, which extracts coal from the face of a coal seam under a highwall in a surface mine, which has reached the final highwall position due to uneconomic stripping ratios or due to local constraints which limit further surface mining. Email addcar highwall mining 91 york street, teralba, nsw, australia 2284 p. Highwall mining, an extension to open cut mining, commonly use auger and continuous highwall mining system. Therefore, study of highwall mining system application in indonesia is needed in order to increase the recovery rate of coal mining in indonesia. The use of highwall mining systems has increased substantially in openpit coal mines. However, the program is being used in permit applications for highwall mines in the us. Highwall safety safety training powerpoint presentations. Addcar systems llc is an international highwall mining hwm specialist based in ashland kentucky, usa with over 25 years experience operating hwm systems in the coalfields of australia, usa, south africa and india. Pursuant to title 30, code of federal regulations 30 c. Highwall miners highwall mining, superior highwall miners.
Highwall article about highwall by the free dictionary. Calculates a stability factor sf for the web and barrier pillars associated with a highwall mine plan. Were with jim argabrite, the owner and president of professional highwall mining services, llc. When the last economic cut has been made with a surface mining operation, the coal seam. Highwall mining is an important coal mining method. Cdc mining ground control design for highwall mining. Highwall mining is a proven primary method for mining coal from outcropping horizontal seams. For twopass highwall mining of seams greater than 4m in thickness, it was found that by using a 3% cement stabilised paste backfilled that cures to 1mpa crushing strength. The machine is generally operated from a bench that is created by the removal of overburden material and coal by way of contour surface mining around the perimeter of a coal seam. Three zones in particular should still be classified as most likely failure locations 17390 file a page 5 of 10. Professional highwall mining services, llc late highwall miner for sale professional highwall mining services, llc was formed in 20 and the company has seen steady growth. Excellent mobility the highwall miner trams easily from entry to entry and discharges coal in tight spaces.
The highwall will then be inspected by a certified person for potential damage incurred by the blast before the mining process begins. In the united kingdom and south africa, a coal mine and its structures are a colliery, a coal mine a pit, and the. Highwall mining injuries have been associated with handling materials, slips and falls, machinery, powered haulage, and other types of inci dents. If there is a need for an exception to this procedure, highwall mining operations will cease until the blast is completed. Highwall mining is an efficient, proven and durable method for mining coal from exposed horizontal seams producing an average of 110 000 tonnes 120,000 tons of coal per month in coal seams up to 300 m 1,000 ft in seams dipping up to 8 degrees recovering up to 70 percent of inplace coal.
The purpose of the highwall mining system is to extract coal with an auger machine or a continuous miner from exposed seams at the base of open. Steel and cement industries use coal as a fuel for extraction of iron from iron ore and for cement production. The aim of the method was to recover coal from a surface mine that has reached its economic limit. The falls consisted of the roof coal and rock binder and often caused both color video subsystems to become ef fectively unusable because of the accumulation of strata on the top of the tscm. With ahs highwall mining systems, mine operators can mine previously unrecoverable coal seams of various heights and slopes and unmatched seam penetrations. Chm system has routinely reached 500m penetration distance into the coal seam from the base of the highwall and has. Free fulltext pdf articles from hundreds of disciplines, all in one place. Ivan rilski sofia 1700, bulgaria abstract the socalled highwall mining systems have been effectively applied for the last. Radar continues to indicate deformation across the highwall. Geotechnical issues on application of highwall mining system inindonesia t. Whether youre operating a trench, open cast or contour mine, the cat highwall mining system can extract coal affordably and safely. Refer to the help section for more detailed instructions.
Highwall mining of thick, steeply dipping coala case study in. Highwallauger mining open pit and open cast methods employ a conventional mining cycle of operations to extract minerals. We have provided consulting for highwall mining operations in australia and india as well as currently providing consulting services to highwall mining companies throughout the united states. Considering highwalls in developing reclamation plans for nonmetallic mining sites in wisconsin april 2003 depending on their location, highwalls may pose various safety or pollution hazards and. It trams easily from entry to entry and discharges coal in tight spaces. Geotechnical issues on application of highwall mining. But perhaps the greatest risk, to both personnel and equipment, is from ground control. This paper described the characteristics of the highwall mining system and discussed the appropriate highwall mining system application in weak geological condition, indonesia. Ahs provides a radical alternative to current highwall mining equipment. Coal is valued for its energy content and since the 1880s, has been widely used to generate electricity.
The mine safety and health administration requires highwall mining operators to follow ground control plans that specify the pillar sizes necessary to prevent a pillar collapse that would threaten highwall stability. Surface and underground coal mining are broad activities that incorporate numerous variations in equipment and methods, and the choice of which method to use in extracting a coal seam depends on many technological, economic. Apr 29, 2016 therefore, study of highwall mining system application in indonesia is needed in order to increase the recovery rate of coal mining in indonesia. Highwall safety videos browse our collection of highwall safety videos. This safety alert provides safety advice for the nsw mining industry. To download, rightclick on the file name and select save target as. Pdf almost all the coal is produced from open cut mines in indonesia. Highwall stability remains the major safety concern during highwall mining. A read is counted each time someone views a publication summary such as the title, abstract, and list of authors, clicks on a figure, or views or downloads the fulltext. The method evolved from auger mining but does not meet the definition of surface mining since it does not involve the removal of overburden to expose the coal seam.
Highwall mining is an important surface coal mining method, and it may account for approximately 4% of total u. Proceedings of the 16th coal operators conference, mining engineering. Risk assessment workbook for mines metalliferous, extractive and opal mines, and quarries iga019 december 2009 mine safety operations. Stability of highwall mining slopes, openings, and pillarsare typically analyzed using the armpshwm program, as well as lamodel, udec and slopew. No radar in place a 15mt standoff bund had been put in place. High wall mining technology highwall mining is a remotely controlled mining method, which extracts coal from the face of a coal seam under. Ventilation of highwall mining to control methane concentration at the moura mine page i abstract methane is a highly explosive gas released during coal mining that presents an imminent problem when mixed with oxygen in regard to maintaining safe working conditions in underground and highwall mines. Coal mining is the process of extracting coal from the ground. Jim argabrite talks to coal miner exchange bill reid. Specalog for cat hw300 highwall mining system aehq683600.
Highwall stability is the major ground control related safety concern. In this method of mining, an unmanned continuous miner is driven underground and operated in front of the highwall. This report discusses the highwall mining method, its suitability for the coal seams in the state of west virginia, and the potential improvement to mining safety. Okubo encyclopedia of life support systems eolss is essentially surfacebased. The victim was building a ramp to the lower bench, was positioning his haul truck to dump a load of material near the edge of a highwall, and rolled backwards over the 90. Coal mine safety and health report of investigation surface coal mine fatal fall of highwall may 24, 2000. The climax mine of amaxs climax molybdenum division is currently producing approximately 34,000 tons of molybdenum ore per day from two. High wall mining technology highwall mining is a remotely controlled mining method, which extracts coal from the face of a coal seam under a highwall in a surface mine, which has reached the final highwall position due to uneconomic stripping ratios or due to local constraints which limit further surface mining. In many seams where the seam strength ucs basis is less than 7mpa to 8mpa, this level of recovery exceeds the 52% to 58% recovery that might be achieved without backfill. A detailed look at coal mining and the highwall method. Aai applies operational experience, empirical relationships, and numerical modeling analyses to develop designs that.
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