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. Highwall mining continues to grow in importance as a coal production method from u. The cut coal is transported by conveyors behind the miner to the. Addcar highwall mining systems have produced in excess of 100mt of coal and is the leader in maximising resource recovery and cost. Mega recruits the best operators from around the industry. A detailed look at coal mining and the highwall method. With over 20 years experience operating systems in the coalfields of australia, usa, south africa and india, addcar highwall mining systems have produced in excess of 100mt of coal and is a. Contract highwall mining llc imperial hollow mine frank justice 1857536 rockholds 96,984 9 84 blue gem 20 0 0 0 0 contract highwall mining llc shm10 maple creek north frank justice 1857530 williamsburg 12,327 5 42 blue gem 18 jellico 24 0 0 0 0 green hill mining inc ghm 403 laird t orr 1261991 rockholds 8,345 2 76 jellico 20 blue gem 20 0.
Highwall stability is the overriding concern in highwall mining. However, there are geotechnical considerations with highwall mining. Combined geotechnology potentials in the process of coal deposits. 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. Search for highwall exact phase on the loyalty points database displays, icon, reward name, lp cost, isk cost and required items from eve online. Almost all the coal is produced from open cut mines in indonesia. Highwall mining, an extension to open cut mining, commonly use auger and continuous highwall mining system. The highwall mining machine stands on the pit floor or on a bench, directly in front of the exposed seam and makes. A geotechnical rationale for the design of south african open. Meet the industry leaders who shape the future of mining across europe, middle east and africa. Specalog for hw300 highwall mining system aehq680201. The method has the advantage of low capital cost and less lead time. As a consequence of open cut mine application, a great deal of coal is left out in the highwalls of the. Fall of highwall surface mine virginia fairbanks coal company inc fairbanks no.
Firstly, due to its flexibility and mobility, it is easier to recover smaller blocks of coal, which. Highwall stability is the major ground control related safety concern. 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. Highwall mining is used to mine coal from underneath the inal highwall, when the strip limit is reached due to economic reasons or surface conditions contour mining.
The upland complex is of great interest economically, as it is the primary source of sand and gravel for memphis, tennessee and the surrounding region. Upon selecting help, one is directed to users manual documentation related. Reliable information about the coronavirus covid19 is available from the world health organization current situation, international travel. It involves remote deployment of a continuous miner in openings beneath the final highwall, with no personnel entry. The caterpillar team uses an evaluation of your geological data and site plan to determine how best to use a cat highwall mining system. It involves remote deployment of a continuous miner in openings. In 2016, australia was the biggest net exporter of coal, with 32% of global exports 389 mt out of 1,2 mt total, and was the fourthhighest producer with 6. Cat highwall mining system the industryleading cat highwall mining system is a new, lowcost addition to traditional mining methods. Notification of highwall mining and auger mining as a highrisk activity,technical reference mine safety ctr001, nsw dpi, supplement to guidance note gnc009 highrisk. Highwall mining systems a chm system after caterpillar inc. 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.
It is used where overburden depth exceeds economical recovery. A geotechnical rationale for the design of south african open cast coal mine highwalls by r. Highwall hazards on august 30, 2003 a mobile equipment operator was injured while working at a surface coal mine. Yes, i would like to receive information and upcoming promotions from butler. Analysis of mine safety and health administration msha accident and injury statistics shows. Surface mining, including strip mining, openpit mining and mountaintop removal mining, is a.
Figure 1 shows a typical highwall after open cut and highwall mining. Highwall miners highwall mining, superior highwall miners. Professional highwall mining services, llc was formed in 20 and the company has seen steady growth. If a wall is exposed for long periods, providing benches will keep this material out of the pit where workers are located.
Jan 20, 2008 highwall hazard recognition cmnm dvd includes both english and spanish versions if your job puts you on or near highwall operations, you need to be especially careful. High wall mining system use auger enclosed inside the push beam that prevent the mined coal from being contaminated by rock debris during the conveyance process. Aerial drone photography of an active pit within a sand and gravel quarry in desoto county, mississippi, was conducted to better understand the upland complex, which is a highlevel pliocene terrace of the mississippi river. 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. With ahs highwall mining systems, mine operators can mine previously. Highwall safety safety training powerpoint presentations. Pdf the mine planning process comprises three major stages. Fairchild, regional sales managerhighwall miners, caterpillar cat, spoke about the history of the. Capable of full operation with a three to fourman crew, the cat highwall mining system. Addcar highwall mining system ugm addcar systems llc is an international highwall mining specialist based in ashland kentucky usa. New software for sizing pillars for highwall mining. Development 2015 under the editorship of a e kontorovich, s m nikitenko et al.
The companys filing status is listed as terminated 12312070 and its file. 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. Highwall mining is a proven primary method for mining coal from outcropping horizontal seams. The miner was operating a hitachi hydraulic shovel when a 35foot wide by 35foot high section of the highwall toppled onto the operators cab, pinning him inside. To safely scale using the shovel, maintain the highwall height within the reach of the bucket. The various methods of mining a coal seam can be classified under two headings, surface mining and underground mining. Highwall mining is a remotely controlled mining method which extracts coal from the base of an exposed highwall. 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, and social factors. 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. Through a web browser, users are able to edit and save modifications to the input. Spoil is dumped on the highwall during dragline mining of the final strip if low wall placement becomes spoil bound. Highwall stability benching increase the safety factor of a highwall by providing additional material near the base of a wall.
Sme mining engineering handbook 3rd edition knovel. 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. Analysis of highwall mining stability the effect of. Development of a webplatform for mining applications sciencedirect. Pdf this paper reports on a novel application of ground penetrating radar to a longwall steering. Preparation will consist of removing timber, topsoil removal if required, drilling and blasting of overburden, overburden removal, coal removal, regrading, topsoil replacement, and.
Pdf use of ground penetrating radar in underground coal mining. Notification of highwall mining and auger mining as a highrisk activity,technical reference mine safety ctr001, nsw dpi, supplement to guidance note gnc009 highrisk activities. In this method of mining, an unmanned continuous miner is driven underground and operated in front of the highwall. Gprbased cid system in longwall and highwall mining.
However, there are geotechnical considerations with highwall mining that require careful engineering to realize the full economic and safe potential of highwall mining. The system can produce 40 000110 000 tonnes 44,000 to 121,000 tons of coal per month, depending on seam height. Application of highwall mining system to recover residual. Position the shovel and trucks so that the shovel cab swings away from the highwall when loading. In early stages of moving materials out of surface mines, manual labour, horse drawn vehicles and mining railways moved materials. Designs for highwall safety bunds in open cut coal mines. To download, rightclick on the file name and select save target as. We operate both addcar and superior highwall mining systems. Highwall mining of thick, steeply dipping coala case.
Safer web company snapshot mega highwall mining llc. Many candidate areas for highwall mining have thick and steeply dipping seams. Omega highwall mining completes a safe and successful start up by lee buchsbaum, associate editor and photographer driving through the red and orange autumn foliage covering the virginia hills near richlands, j. Highwall mining is an important surface coal mining method, and it may account for approximately 4% of total u. Material properties tables 0 click to view available tables in the resource. Highwall mining is a proven technology in usa and australia to extract the blocked coal in thin nonworkable seams and the coal blocked in the highwall of opencast mines. Instead of an auger hole, an entry into the coal seam is made by. Highwall mining is a technique for attaining additional coal recovery after the economic strip limit is reached in surface mining. Butcher synopsis open cast mining has been practiced in south africa since the late 1970s under near ideal geotechnical conditions. The houston chronicle is the premier local news provider for the nov 14, 2012 lipari has been in production since 2008 and has diversified surface and highwall mining of. In figure 2, spoil that has been dumped on the highwall is to be rehabilitated. In general, those are systems of underground coal mining with mine entries directly communicating to the surface. Highwall mining economic and environment friendly mining.
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. When the last economic cut has been made with a surface mining operation, the coal seam. World dangerous idiots bulldozer heavy equipment operator skill fastest underwater dozers driving duration. The socalled highwall mining systems have been effectively applied for the last 1015 years in coal mining practice in usa, australia and the rsa. The history of the indian coalmining industry is traced back to both the preindependence and postindependence period in order to show how the industry has progressed to the present day. The surface mining method of area mining will be used at this mine site. Highwall miner 1 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. An apparatus for mining aggregate material from a partially exposed seam adjacent a bench on a surface mine and which extends from the bench at an elevation and angle relative to the bench. Blood quarry highwall and stockpile dangers the simsons learn valuable safety lessons around highwalls and stockpiles.
Highwall miners link underground and surface mining operations by extracting coal from exposed horizontal seams in openpit mines. Highwall miners link underground and surface mining operations by extracting coal from exposed horizontal seams in openpit. Drones free fulltext drone geologic mapping of an active. Akihiro hamanaka, takashi sasaoka, hideki shimada, kikuo matsui, hiroshi takamoto. Professional highwall mining services located in beckley. Highwall stability due to punch mining at opencut coal mines. Exposure increases the likelihood of deteriorating material falling out of the wall. Pdf as semiunderground and semisurface mining methods, the auger and highwall mining methods are used to extract the remaining coal reserve after. Search for highwall exact phase on the loyalty points. Over the last 2 years we have successfully brokered 4 used highwall miners. Highwall mining is another form of mining sometimes conducted to recover additional coal adjacent to a surface mined area. Remotely operated cutter head goes underground near horizontal no underground exposure to personnel extraction by parallel drivages 300m length leaving coal web pillars provides stability to strata ventilation roof support not required as no exposure to. Highwall stability remains the major safety concern during highwall mining. Highwall mining of thick, steeply dipping coala case study.
Ensure loose material is scaled prior to performing work. Commonwealth mining llc is a highwall mining services co. In the past decade, with the exhaustion of the traditional south african coal fields, geotechnical conditions have. Jul 15, 2010 thanks for such valuable presentation on highwall mining,the new concepttechnology in mining industry. When the conditions are just right youre hard pressed to find a better coal mining machine than a highwall miner. 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. Fairchild, regional sales manager highwall miners, caterpillar cat, spoke about the history of the. Find supplier datasheets for highwall miners on globalspec.
I learn manythings,better to appear foral before dgms. Omega highwall mining completes a safe and successful start up by lee buchsbaum, associate editor and photographer driving through the red and orange autumn foliage covering the. 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. In addition to being a very productive and economic coal production method, analysis shows that auger and highwall mining appears to be as safe as surface coal mining 6. Highwall fall near miss photos only of a near miss highwall fall. In highwall mining, the coal seam is penetrated by a continuous miner. Ground control plans for highwall mining should specify hole width, web pillar width, barrier pillar width and number of holes between barriers.
Extracting coal affordably and safely highwall mining is a proven primary method for mining coal from exposed seams. New software for sizing pillars for highwall mining the use of highwall mining systems figure 1 has increased substantially in openpit coal mines. The mine safety and health administration requires. 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. Ahs provides a radical alternative to current highwall mining equipment.
Conventional highwall mining extracts coal with an auger machine or a continuous miner from exposed seams at the base of opencut or strip. Teleoperation of a highwall mining system book, 1992. Our highly skilled experts are eager to assist you to determine the feasibility of your highwall mining project. Application of highwall mining system in weak geological.
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