Warrior Met Coal currently operates MINE No. 4 and MINE No. 7.
The met coal is mined using longwall extraction technology with development support from continuous miners.
MINE No. 4 - underground operation with single longwall system.
The mining plan at the No. 4 Mine is based upon underground longwall mining methods, which incorporates the use of the room-and-pillar method which facilitates and supports the production from the longwall equipment. Two coal seams within close proximity of each other, the Blue Creek and Mary Lee seams are being mined simultaneously (locally referred to as “twin seam mining”), at a depth of approximately 2,000 feet. Both seams are suitable for metallurgical purposes and/or as a compliance steam coal.
Description:
- Seam - Blue Creek/Mary Lee;
- Seam height - 45 inches;
- Cutting height - 85 inches;
- Panel width - 1,115 ft;
- Panel length - 4,000-13,000 ft;
- Over-burden - 1,600 ft;
- No. of gate entries - 4;
- Depth of cut - 36 inches;
- Shearer - Joy 7LS-1D;
- Haulage system - Ultratrac 2000;
- Roof support yield (tons) - Joy 1,300;
- Face conveyor type (strand, motors) - JWR with CSTs, 42-mm chain, twin strand inboard, three 1,200-hp motors;
- Face conveyor width/speed - 1,000 mm/305 fpm;
- Stageloader type, width, speed - JWR, 1,300 mm, 420 fpm;
- Crusher - JWR.
MINE No. 7 - underground operation with two ........
