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<br />Surface Deformation Prediction System 4.Op <br />Profile Function Method (Hyperbolic Tangent) <br />Input Data: <br />Mining system ........................ Room-and-Pillar <br />Panel length ... ..................... 700.0 (ft) <br />Overburden depth ..................... 420.0 (ft) <br />Extraction thickness ................. 7.50 (ft) <br />Percent hardrock ..................... 11.0 (~) <br />Extraction ratio ... ... ....... 75.0 ($) <br />Estimate of inflection point (I.P.) .. Conservative <br />Calculated Parameters: <br />Panel geometry .... ................. Supercritical <br />Maximum subsidence (Smax) ............ -4.21 (ft) <br />Maximum subsidence factor (Smax/m) 0.562 <br />Offset of inflection pt. from rib (inby) 84.0 (ft) <br />Distance of point of Smax from I.P. ... 168.0 (ft) <br />Subsidence Distribution <br />Distance ; Distance ; Distance <br />from Panel Subsidence; from Panel Subsidence; from Panel Subsidence <br />Center Center Center <br />0 -4.21 ~ 204 -3.34 , 408 -0.19 <br />12 -4.21 ~ 216 -3.15 ~ 420 -0.15 <br />24 -4.20 ~ 228 -2.93 ~ 432 -0.12 <br />36 -4.20 ~ 240 -2.69 ~ 444 -0.09 <br />48 -4.19 , 252 -2.43 ~ 456 -0.07 <br />60 -4.18 ~ 264 -2.16 ~ 468 -0.05 <br />72 -4.16 ~ 276 -1.89 ~ 480 -0.04 <br />84 -4.14 , 288 -1.62 ~ 492 -0.03 <br />96 -4.12 ~ 300 -1.38 ~ 504 -0.03 <br />108 -4.09 ~ 312 -1.15 ~ 516 -0.02 <br />120 -4.05 ~ 324 -0.95 , 528 -0.02 <br />132 -4.00 , 336 -0.77 ~ 540 -0.01 <br />144 -3.94 ~ 348 -0.62 ~ 552 -0.01 <br />156 -3.86 ~ 360 -0.50 , 564 -0.01 <br />168 -3.76 ~ 372 -0.40 , 576 -0.01 <br />180 -3.65 , 384 -0.31 ~ 588 -0.00 <br />192 -3.51 ~ 396 -0.25 ) 600 -0.00 <br />Table III. SDPS Profile Function calculation of predicted subsidence from <br />panel center to "o" point of surface movement. <br />14 <br />