PERMFILE115275

• Permit No: C1981041A
• IBM Index Class Name: Permit File
• Doc Date: 5/13/2002
• Doc Name: Subsidence Appendices
• Section_Exhibit Name: TAB 20 APPENDIX 20-4 TO APPENDIX 20-9
• Media Type: D
• Archive: Yes

TABLE 3. Predicted Room and Pillar Subsidence Maxima
at Selected Overburden Depths
Mining Single Room & Pillar Panel Multiple Room ~ Pillar Panels
Depth Vertical Tensile Compressive Tilt Vertical Tensile Compressive Tilt
(f t) (Smax ft) Strain Strain (G min) (Smax ft) Strain Strain (G min)
(+E N{ ) (-E NE) (+E u E ) (-E ,u E)

1200 1.38 880 1810 12.8 3.11 1690 1320 24.5
1500 1.07 480 1310 7.4 3.31 1430 1120 20.8
•r.
1600 0.97 430 1160 6.3 3.36 1370 1070 19.9
2000 0.69 220 740 3.2 ' 3.55 1160 910 16.8
2400 0.52 120 460 1.9 3.71 1010 790 14.6
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