PERMFILE131380

• Permit No: C1981041A
• IBM Index Class Name: Permit File
• Doc Date: 6/16/2003
• Doc Name: TOC to Appendix 20-3
• Section_Exhibit Name: Tab 20 Subsidence Survey Monitoring & Control Plan
• Media Type: D
• Archive: Yes

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APPENDIX D
LOAD TRANSFER DISTANCE DATA
r
Depth (ft} Distance (ft) Depth (ft) Distance (f t)
350 (I) 50 310 (2) 28
_, 455 90 210 9
360 110 270 40
~ 600 120 240 30
~ 415 130 365 42.5
' 600 255 405 68
500 170 358 88
- 555 180 445 100
730 200 478 113
`" 875 210 536 125
960 195 0 9
555 225 700 165
710 210 450 128
970 235 1200 240
530 120 3 5 4.
1225 250 1100 6 275
1200 255
~-~ 1160 265 600 8 94
~° 1015 295 0
` 1455 290 1800 10 210
1575 295
~ 1320 320 2280 525
w 1210 325
1415 355
1820 410
Notes: (1) 7th Progress report of an investigation into th e cause of
falls and accidents due to falls, Trans. Inst. Min. Engrs.;

f' vol. 108, 1948-49, pp. 489-510.
(_ (2) Alves, C.A., Rock mechanics instrumentation app lied to
longwall coal mining; Unpublished thesis, Colo. Sch, of Mines,
~-
~' 1977, 224 p.
~" (3) Stewart, C.L., Rock mass response to longwall m ining of a
_ thick coal seam utiiizirtg shield type supports; Unpublished
thesis, Colo. Sch. of Mines, 1977, 384 p,
_+ (4) Martin, C.H. and Hargraves, A,J., Shortwall min ing with power
supports in the Broken Hill Pty. Co. Ltd. mines in Australia;
in 5th Int'1. Strata Control Conf., 1912, Paper 13, 13 p,