Overview
Stage | Production |
Mine Type | Underground |
Commodities |
|
Mining Method |
- Continuous
- Room-and-pillar
|
Processing |
- Wash plant
- Dense media separation
|
Mine Life | 2021 |
Leer South/Sentinel mining complex consists of the existing Sentinel underground mine in the Clarion seam, the Leer South longwall operation being developed in the Lower Kittanning seam, a preparation plant and a loadout facility located on approximately 26,000 acres in Barbour County, West Virginia. |
Source:
p. 11
Wolf Run Mining Company, LLC is an indirect subsidiary of Arch Coal, Inc.
Mining Methods
- Continuous
- Room-and-pillar
Summary:
Room and pillar mining is effective for small blocks of thin coal seams. In room and pillar mining, a network of rooms is cut into the coal seam, leaving a series of pillars of coal to support the roof of the mine. Continuous miners are used to cut the coal and shuttle cars are used to transport the coal to a conveyor belt for further transportation to the surface. The pillars generated as part of this mining method can constitute up to 40% of the total coal in a seam. Higher seam recovery rates can be achieved if retreat mining is used. In retreat mining, coal is mined from the pillars as workers retreat. As retreat mining occurs, the roof is allowed to collapse in a controlled fashion.
Processing
- Wash plant
- Dense media separation
Source:
Summary:
Coal from the Sentinel mining complex is processed through the preparation plant and shipped by CSX rail to customers.
Production:
Commodity | Units | 2019 | 2018 | 2017 | 2016 | 2015 | 2014 | 2013 |
Coal (metallurgical)
|
M tons
| ......  | 1.2 | 1.5 | 1.1 | 0.9 | 1.1 | 1 |
All production numbers are expressed as clean coal.
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Reserves at December 31, 2019:
Category | Tonnage | Commodity |
Proven & Probable
|
43.2 M tons
|
Coal (metallurgical)
|
Heavy Mobile Equipment as of December 31, 2015:
HME Type |
Continuous miner
|
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