Coal Mining Highwall

26-11-2010· And the answer is what is known as Highwall Mining. When the last economic cut has been made with a surface mining operation, the coal seam is still exposed, lying under the …

02-09-2020· Highwall mining is an adaptation of auger mining. 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. The cut coal is transported by conveyors behind the miner to the…

There are five main forms of surface mining, detailed below. "Strip mining" is the practice of mining a seam of mineral, by first removing a long strip of overlying soil and rock (the overburden); this activity is also referred to as "overburden removal". It is most commonly used to mine coal and lignite (brown coal). Strip mining is only practical when the ore body to be excavated is relatively near the surface. This type of mining uses some of the largest machines on earth, including

We are Commonwealth Mining LLC. Premier Contractors that have taken the lead on Safety, Reserve Recovery with the Highest Production levels while maintaining Premium Coal Qualities. Commonwealth Mining LLC is a Highwall Mining Services Co. that has Operated Highwall Miners in Ohio, West Virginia, Kentucky, Alabama and Virginia.

25-08-2020· Highwall is the unexcavated face of exposed overburden and coal in a surface mine. Additionally, highwall mining is another technique within mining practices sometimes conducted to recover additional coal. Presplit blasting facilitates highwall integrity and highwall safety.

Underground & highwall mining characteristics: Single coal type with potentially high dilution Mines a working section based partly on geotechnical considerations Very high peak production All coal is cut by pick with high fines content No selective mining possible – limited range of …

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. ADDCAR highwall mining systems have produced in excess of 100Mt of coal and is the leader in maximising resource recovery and cost ...

Mining. Highwall mining is a hybrid of surface and underground mining technologies that is used to recover coal that is otherwise uneconomical due to: Increasing open – cut strip ratios; Reaching pit limits with available coal in the barrier pillars; Protected surface features (e.g. rivers, streams, archaeology)

Highwall mining is a hybrid of surface and underground mining technologies that is used to recover coal that is otherwise uneconomical due to: Increasing open – cut strip ratios Reaching pit limits with available coal in the barrier pillars Protected surface features (e.g. rivers, streams, archaeology) Inadequate panel length for a punch long wall Mining […]

Figure 1: Highwall mining systems (a) CHM system (after Caterpillar Inc.), (b) Auger mining system (Coal Augering Services 2014) Highwall mining has several advantages compared to underground operations and conventional surface operations. Firstly, due to its flexibility and mobility, it is easier to recover smaller blocks of coal, which

1 Coal Mining - basics Coal Mining Methods Underground Bord & Pillar Longwall Surface Open Cut Strip Open Pit Highwall Auger Continuous Highwall Miner Punch Bord & Pillar Continuous Miner & shuttle cars or continuous haulage Highly flexible, high cost – can handle geological variability 1.5-3m per pass, but can take up to 3 passes in good

where highwall mining was conducted in two coal seams. Th e lower seam was 5 ft (1.5 m) thick . while the upper seam was 3 ft (0.9 m) thick. The two seams were separated by a weak, lam i-

What is Highwall Mining? Highwall mining is a proven primary method for mining coal from outcropping horizontal seams. In this method of mining, an unmanned continuous miner is driven underground and operated in front of the highwall. The highwall mining machine stands on the pit floor or on a bench, directly in front of the exposed seam and makes

Where highwall mining or augering has occurred, geotechnical monitoring is required to assess highwall stability and estimate the extent of long-term highwall edge deterioration. ... Open cut coal mines cover extensive areas, and cost-effective highwall bunds are required for safety.

01-06-2012· ADDCAR's push/pull technology and cascading conveyor cars maximizes through put volume and decreases fines. Only ADDCAR systems offer navigational capabiliti...

Highwall definition, the unexcavated face of exposed overburden and coal in a surface mine. See more.

Highwall mining (HWM) technology is an efficient method for exploiting residual coal resources in Chinese open-pit coal mines. However, on-site personnel and equipment can be damaged by the instability of the highwall mining residual coal pillars and subsidence of final end-walls.

Highwall mining is an important coal mining method. More than 60 highwall miners are presently in operation, and they may account for about 4% of total U.S. coal production. A review of accident data for 1983-2002 from the Mine Safety and Health Administration identified nine fatalities attributable to auger and highwall mining, of which inadequate ground control accounted for one-third.

What is Highwall Mining? Highwall mining is a proven primary method for mining coal from outcropping horizontal seams. In this method of mining, an unmanned continuous miner is driven underground and operated in front of the highwall. The highwall mining machine stands on the pit floor or on a bench, directly in front of the exposed seam and makes

Highwall Mining Evolves. From the bridge of the highwall miner, an operator advances a cutterhead, or an unmanned cutter module, into an exposed coal seam. The machine rests on crawler tracks on the bench below the highwall. Coal is extracted in parallel rectangular (the width of the cutterhead) entries spaced at various intervals.

Where highwall mining or augering has occurred, geotechnical monitoring is required to assess highwall stability and estimate the extent of long-term highwall edge deterioration. ... Open cut coal mines cover extensive areas, and cost-effective highwall bunds are required for safety.

01-03-2018· Highwall mining is a mining method that produces coal from the base of highwall in surface mines as illustrated in Fig. 1.A series of parallel entries are driven into the coal seam using two types of highwall mining systems, namely, continuous highwall mining (CHM) and auger mining.

Punch mining into an open cut highwall In this way a large area of coal can be recovered, beyond the open cut limit, without the need for major investment in infrastructure (shafts, main roadways, etc), the coal produced being delivered into the open cut where other necessary facilities (coal prep plant, surface transport loading facilities, stockpiles, etc) already exist.

technology, surface coal mining technique requiring four to five miners per shift. Volkwein, et al. (1) review the evolution of auger and highwall mining systems in the U.S. including the earliest augers dating from the mid 1940s, early highwall mining concepts such as the “Carbide Miner1”, the “Push-button Miner” (1970s), the “Edna

Highwall Mining system 6. Highwall Mining system Video 7. High wall Mining Technology 8. High wall Mining Technology – Auger Type• Consisting of single or dual cutting heads with coal being cleared by spiraled flights, creating circular entries 9. High wall Mining Technology – …

Mega Highwall Mining LLC. 12081 Virginia Boulevard, Ashland, Kentucky 41102, United States. Office: (606) 929-5590 Fax : (606) 929-5513