Mining of thin coal seams using surface-underground methods
Request PDF | On Jan 1, 2018, Łukasz Bołoz published Mining of thin coal seams using surface-underground methods | Find, read and cite all the research you need on …Web
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New advances in automatic shearer cutting technology for thin …
Liu J (2011) Practices on fully mechanized coal mining equipment matched and mining in thin seam of Datong mining area. Coal Science and Technology 39: 40–43. Google ScholarWeb
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Coal Mining | EME 444: Global Energy Enterprise
Surface mining works only when the coal seam is near the surface. It is, however, usually more cost-effective than underground mining and requires fewer workers to produce the same quantity of coal. And the industry reports that 90% or more of the coal is recovered, a higher proportion than from underground mining.Web
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Developing selective mining capability for longwall shearers using
Natural condition of coal seam in Japan (1956) Working depth (Average) 334.7m (Maximum) 836m Average thickness of seam 1.71m Average thickness of coal 1.31m Output from coal face 48.281Mill. t.Web
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Research on an Intelligent Mining Complete System of a Fully …
The mining environment of thin coal seam working faces is generally harsh, the labor intensity is high, and the production efficiency is low. Previous studies have shown that thin coal seam mining finds it difficult to follow machines, does not have complete sets of equipment, has a low degree of automation, and has difficult system co-control, which …Web
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An innovative approach to thin coal seam mining of complex …
Section snippets Mining conditions of No. 16 upper and No. 17 thin coal seams. The No. 16 upper and No. 17 coal seams in Yanzhou mining area, China, are both thin. The thickness of No. 16 upper coal seam varies from 0.60 to 1.60 m while the No. 17 coal seam from 0.50 to 1.39 m. They are both of complex geological conditions, widely …Web
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(PDF) Thick Coal Seam Mining
Of the country's total minable coal reserves, 17.4% are thin seams (less than 0.8 meters [m] thick), 37.8% are classified as medium thickness (between 0.8 m and 3.5 m), and the remaining 45% have ...Web
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Development of an Underground Automated Thin-Seam Coal …
This thesis presents a brief overview of current technologies utilized for underground coal mining in the United States. This is followed by a review of developments in highwall …Web
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[PDF] Development of an Underground Automated Thin-Seam …
The new advances that several manufacturers are developing to address the integration of mining and continuous haulage systems are also investigated. That …Web
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Multi-seam mining of the deep Waterberg resources
The deposit is technically unique and challenging, being a multi-seam coal deposit with a total of 12 seams over a thickness of 110 m as shown in Figure 3, including Zone 5. There is currently limited knowledge on the …Web
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Surrounding rock control theory and longwall mining technology
More than 85% of the mines in China have thin coal seam < 1.3 m, which is mainly mined as protective layer for the lower coal seam. Due to the unsteady thickness of the thin coal seam, the mining space is narrow and small. There has been a contradiction between the capacity and the size of equipment.Web
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(PDF) Study on Antiweathering Support Technology of Thin …
The thin spray-on liner is an inorganic polymer product that has been widely used to support mine perimeter rock roadways, but it is mainly used in metallic hard rock roadways with high rock ...Web
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CHAPTERS: ECONOMICS OF THIN SEAM COAL MINING.
Dorstfontein Coal Mine has some 7.0S mil. tons of bituminous coal in a thin seam resource with heights varying from 1.2 to 1.4 m. The geological setting of this colliery makes it is a more difficult mine to operate and result in many mining problems. Some mining related problems in the past four years were due toWeb
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Development of an Underground Automated Thin-Seam …
autonomous mining machines is also presented. The new advances that several manufacturers are developing to address the integration of mining and continuous haulage systems are also investigated. That background is employed in devising a conceptual mining system for the underground mining of coal seams in the 14 to 28 inch range of …Web
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Fully mechanized coal mining technology for thin coal seam …
seams with thickness of 0.8~1.3 m are in the thin coal seam group and thickness of less than 0.8 m are in the extremely thin coal seam group (Chai, 2007; Dong and Pan, 2008). With the decreasing of coal resources with seam thickness in the middle to thick range, more and more thin coal seams will have to be mined in the future (Li et al., 2005).Web
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PREVIOUS AND CURRENT MINING METHODS.
more than 75 percent of all thin seam coal worldwide and that mainly from the Ukraine. In Europe the mining techniques have been developed for deep mining conditions while in the U.S.A shallower and flatter seams have allowed for room and pillar methods. The largest producers of thin seam coal are the former U.S.S.R. and theWeb
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Potential use of thin spray-on liners for gas management in …
:89;6258=;: When a coal seam is influenced by mining activities, gas stored inside is liberated into the underground ventilation system. Gas emissions have created serious difficulties forWeb
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Coal mining
Coal mining - Underground mining: In underground coal mining, the working environment is completely enclosed by the geologic medium, which consists of the coal seam and the overlying and underlying strata. …Web
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Fully mechanized coal mining technology for thin coal seam …
Abstract. In view of the present situations and existing problems of thin coal seam mining under complex geological conditions, low-profile mining equipment for fully …Web
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A Review of Selected Solutions on the Evaluation of Coal-Rock …
The shearer is an important piece of equipment at the fully mechanized coal mining face ().The pick is the core component of the cutting unit as the key device of the shearer [1,2].During automatic and intelligent cutting at the coal mining face, the complex geological conditions, such as the fold structure, fault structure and magmatic intrusion, …Web
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An analysis of contributing mining factors in coal workers
In the United States, an unexpected and severe increase in coal miners' lung diseases in the late 1990s prompted researchers to investigate the causes of the disease resurgence. This study aims to scrutinize the effects of various mining parameters, including coal rank, mine size, mine operation type, coal seam height, and geographical location …Web
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AEXQ0612-01, Continuous Miners Product Line Brochure
in any seam thickness. The range includes machines capable of operating in seams from 0.76 m (30 in) to . 4.70 m (15.4 ft). Top Performance Underground . As the result of an all-out engineering effort, this complete range of miners is on the very cutting edge of underground mining technology. As part of our complete range of Room & PillarWeb
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Recent Patents on Thin Coal Seam Mining Equipment
Methods: The equipment integrates mining operations, conveying operations, and supporting operations, and is suitable for mining short and extremely thin coal seam with a height of 0.35m-0.8m and width of 2m-20m. It has the advantages of the low body of the shearer, no additional support on the working face, and small underground space.Web
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The Influence of Seam Height on Lost-Time Injury and …
Thin-seam or low coal mines are located almost exclusively within the southern Appalachian coal fields. And, in fact, 96 percent of small thin-seam mining operations are located in three states: Kentucky, West ia, and ia. The proportion of total U.S. underground bitumi nous coal being produced from thin-seam mines appears to haveWeb
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DESIGN PROTOCOLS OF CAVITIES CREATED BY …
Figure 2. Non-fatal day lost incident rate for small and medium/large underground coal mines for 1998-2008. [1] During 2008, an estimated 5.2 million tons of coal were produced in the U.S. from thin seams deposits with operating heights less than 1.06 m (42 inches). This represents approximately 14.5% of the total U.S. underground coal production.Web
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Thin seam miner/trench mining concepts for Illinois Basin surface coal
A new coal mining machine that was going to pull some 40 million tons of coal from the Appalachian coalfields by 1986 has had more than its share of start-up problems. The machine, known as the Thin Seam Miner (TSM), is a $2.7-million auger-type mining machine that is designed to bore 220 ft into new or abandoned highwalls (CA 5/82 p. 106).Web
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Development of an Underground Automated Thin-Seam …
This thesis presents a brief overview of current technologies utilized for underground coal mining in the United States. This is followed by a review of developments in highwall mining that are potentially applicable in underground mining of thin seams. Some …Web
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Highwall Mining: Design Methodology, Safety and Suitability
As semi-underground and semi-surface mining methods, the auger and highwall mining methods are used to extract the remaining coal reserve after the economic threshold imposed by the stripping ...Web
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The Thin Coal Seam (TCS) Mining Technology for Open Pit
Coal seam that is thinner than a certain value is defined as thin coal seams (TCS). It commonly occurs in China as it covers 84.2% of the mining area. This …Web
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Waste rock filling in fully mechanized coal mining for goaf
A large amount of waste rock is generated during thin seam coal mining operations underground. The waste rock material stacked on surface also adds to the environmental pollution. So it is important to reduce the amount of waste rock by exploring gainful utilization methods. This paper deals with an investigation undertaken to develop …Web
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