PERMFILE40550

• Permit No: C1984065
• IBM Index Class Name: Permit File
• Doc Date: 12/11/2001
• Section_Exhibit Name: APPENDIX 4.6-1 INITIAL SUBSIDENCE STUDY FOR THE 5 YEAR MINING AREA
• Media Type: D
• Archive: No

i~
LIST OF TABLES
Page
Table 2 - 1 Proposed Mine Structures .....................6
Table 3 - 1 Percentages of Various Lithologies
in Rock Overburden .....................17
Table 3 - 2 Frequency and Thickness of Thick Sandstone
Units in Rock Overburden ...............18
Table 3 - 3 Width to Depth Ratios for Various
Opening Widths and Overburden Depths...23
Table 3 - 4 Predicted Maximum Subsidence for Various
Opening Widths and Overburden Depths...28
• Table 3 - 5 Typical Overburden Swell Factors............33
Table 3 - 6 Anticipated Degree of Subsidence Impact
on Structuzes and Resource Lands Based
on Maximum Worst Case Subsidence.......38
•
(Rev. 65/24/84) page vi