PERMFILE44529 - Laserfiche WebLink

Home Browse Search

Northwest Mains Reorientation (MR 03-182) In late 2002, TCC completed several explorafion projects using a combination of surface seismic lines and drill holes. The data from these projects has allowed TCC to better define the fault system to the east, the steep grades to the north and west, and the fault crossing between the north and west mining districts. As a result, TCC will be reorienting the Northwest Mains towazds the west and north so as to maximize the coal reserves to the north. The Northwest Mains will be fumed in a southwesterly direction at a location just inby the 17 Right gate road. The Northwest Mains will continue in this direction towazds the fault that currently runs between the Northern (NNID) and Western Mine Districts (WNID). Development mining will then explore the extent of the fault. After exploring the extent of the fault, the Northwest Mains will again be turned in the northwest direction to access the northern reserves. This orientation of the Northwest Mains will continue to provide for driving the entries at an angle to the cleat. The location and orientation of the panels and the mains aze shown on Map 23. It can be noted that the panel lengths increase with the 19 Right panel and continues with the mining of the panels in the Northern Mining District. The 16 Right panel will be shortened by approximately 500 feet due to the adverse roof conditions encountered during the driving of the gate road. TCC will maximize the mining of this panel as dictated by roof conditions. The projection for the panel is shown on Map 23, although the length of the panel may be shortened due to the adverse roof conditions. NMD (Panels 12 Right through 16 Right) (PR 99-OS) The NMD will increase the affected area with the pernut, i.e. area overlying longwall panels, gateroads and mains, by 2,779.2 acres. The federal reserved to be mined in the area is presented in Confidential table 6c, OSM, PRS, Federal Reserve Calculations. The azea to be mined in the NMD permit term is shown on Map 23 Mine Plan, The pemrit area is identified by the color coding used in creating the map. The mining layout will include longwall panels length up to approximately 17,000 feet, longwall panel width of 1000 feet, and gateroad, and mine development work as described in PR-03. The dimension of pillazs in these development azeas may vary based upon mining conditions. Sumps and ventilation doglegs will be added as needed, although this location is not provided on Map 23 due to the variable location of these features. During the NMD permit term, longwall mining will be conducted under the Foidel and Fish Creek AVF's, Fish Creek, the Union Pacific Railraod and two reservoirs owned by the Ashleys. Amore detailed discussion of undermining these structures will be presented in a late section. LiNDERGROUND DRILL HOLES (MIt 01-172 ) TCC is planning on drilling f ve underground drill hales to obtain geologic data an the Wolf Creek coal seam. The drill holes will be approximately 2.4" in diameter, with a maximum depth of 250 feet. It is planned for the holes to extend down through the Wolf Creek seam and tag the top of the Trout Creek Sandstone. The locations of the drill holes aze shown on Map 23, Mine Plan. The holes will be drilled from the existing mine works down into the Wolf Creek seam. Upon completion of the drilling program the holes will be plugged with a cement or bentonite slurry. This will seal off any water bearing zones encountered during the drilling program. The slurry will be mixed underground and placed into the boring. The bond estimate for the sealing program is provided in the bond exhibit. Mine Facilities buildings, structures and utility corridors. MR 03-182 2.05-17.2 2/25/03