2008-05-08_PERMIT FILE - C1981018A ‎(2)‎

• Permit No: C1981018A
• IBM Index Class Name: Permit File
• Doc Date: 5/8/2008
• Section_Exhibit Name: Section III. Mine Description
• Media Type: D
• Archive: Yes

TABLE OF CONTENTS
® III. MINE DESCRIPTION ............................................................................................................... III-1
III.A Underground Development ..........................................................................................III-1
III.A.1 Mine Openings ............................................................................................ .. III-2
III.A.1.a Portal - D Seam ............................................................................ ..III-2
III.A.1.b Ventilation Entries - D Seam ......................................................... ..III-2
III.A.1.c Portal - B Seam ............................................................................. ..III-2
III.A.1.d Ventilation Entries - B Seam ......................................................... ..III-2
III.A.2 Mining Systems .............................................................................................. .. III-2
III.A.2.a Room and Pillar Mining ................................................................. ..III-4
III.A.2.b Longwall Mining ............................................................................ ..III-4
III.A.2.c Mining Method Decision ................................................................ ..III-6
III.A.3 Mining Sequence ............................................................................................ ..III-6
III.A.4 Mining Equipment ........................................................................................... ..III-7
III.A.S Roof Control .................................................................................................... ..III-7
III.A.6 Mining Plan ..................................................................................................... ..III-8
I I I.A.7 Subsidence ..................................................................................................... ..III-9
II I.A.7.a Subsidence Area Survey .............................................................. ..III-9
III.A.7.b Subsidence Control ...................................................................... ..III-9
II I.A.7.c Subsidence Prediction .................................................................. III-11
III.A.7.d Horizontal Strain Prediction .......................................................... III-14
III.A.7.e Pillar Failure Subsidence Potential ............................................... III-14
III.A.7.f Conclusions ................................................................................... III-14
III.A.7.g Subsidence Prevention ................................................................. III-17
III.A.7.h Damage Mitigation ........................................................................ III-18
® III.A.7.i General Subsidence Control .......................................................... III-19
III.A.7.j Red Wash and Scullion Gulch ....................................................... III-19
III.A.7.k Subsidence Effects on the Powerline ........................................... III-21
III.A.7.1 Subsidence Monitoring Program .................................................... III-22
III.A.8 Mine Ventilation .............................................................................................. III-26
III.A.9 Underground Transportation .......................................................................... III-28
III.B Surface Support Facilities .............................................................................................. III-28
III.B.1 Coal Handling and Storage ............................................................................ III-28
111.6.2 Coal Preparation Plant ................................................................................... III-29
111.6.3 Refuse Disposal .............................................................................................. III-29
III.B.4 Temporary Coal Laydown Area ...................................................................... III-30
III.C. Auxiliary Facilities ........................................................................................................... III-30
III.D Utilities .. .......................................................................................................................... III-33
III.D.1 Electric Power Supply .................................................................................... III-33
III.D.2 Water Supply .................................................................................................. III-34
III.D.3 Sewage Treatment ......................................................................................... III-34
III.D.4 Telecommunication ........................................................................................ III-34
III.E Coal Loa dout and Railroad Facilities .............................................................................. III-34
II I.F Miner Re scue Infrastructure ........................................................................................... III-35
Minor Revision #133 (2/2008)