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W/d:(2)E10-E12:1080 / 400 2.70 B12-13A:950 / 750 1.27 <br />1080 / 1100 0.98 950 / 1300 0.73 <br />Max <br />Min <br />Max <br />Min <br />Max <br />Min <br />Max <br />Min <br />Max <br />Min <br />Max <br />Min <br />Max <br />Min <br />Max <br />Min <br />Max <br />Min <br />Max <br />Min <br />Max <br />Min <br />Max <br />Min <br />(1) <br />(2) <br />(3) <br />(4) <br />(5) <br />(6) <br />(7) <br />(8) <br />(9) <br />Sum of E and B-Seam <br />MiningB-Seam MiningE-Seam Mining <br />0.028 0.039 <br />0.007 0.009 <br />Maximum tilt and strain parameters apply only to ground surfaces with slopes less that 30 percent; values may be greater on slopes steeper <br />than 30 percent. <br />All panels are numbered according to planned panel identifications. <br />100 100 <br />75 <br />-Em (in terms of Sm/d) (7) <br />(-1.2 to -1.5 Sm/d) <br />Maximum Crack Depth <br />(8) <br />1 <br />2 150 150 <br />75 <br />150 <br />50 <br />100 <br />-0.007 <br />Subsidence and subsidence factor above chain pillars. <br />Subsidence (maximum vertical displacement) above longwall panel centers, based on planned coal extraction thickness listed. <br />Ratio of the range of maximum vertical displacement to overburden depth range for the longwall panels. <br />Maximum range of tilt in terms of Sm/d; values of 2.2 to 2.3 Sm/d are obtained from the graph in Figure 5. <br />Maximum range of horizontal strain in terms of Sm/d; values for tensile (positive) strain of 1.2 to 1.4 Sm/d and compressive (negative) strain <br />of -1.2 to -1.5 Sm/d are obtained from the graph in Figure 5. <br />Angle measured from a vertical reference. <br />TABLE 3 <br />MAXIMUM SUBSIDENCE PARAMETERS FOR <br />APACHE ROCKS WEST MINING AREA(1) <br />Maximum crack depth (in feet) in bedrock predicted to locally occur on or near steep slopes and ledges in the Minnesota Creek and Lick <br />Creek drainage areas and above barrier pillars and rigid chain (gate road) pillars. The first depth range (1) is for bedrock sloping less than, <br />or equal to, 30 percent; the second depth range (2) is for slopes more than 30 percent. Add 5 to 15 feet where thick, brittle sandstones <br />occur in ridges and near cliffs. No cracks are predicted to occur in alluvium. No cracks are predicted to occur at the surface of colluvium <br />thicker than about 10 feet. <br />5°5° <br />14°14°14°14° <br />75 75 75 <br />5°5° <br />t = 12 ft <br />14° <br />19° <br />0.046 0.064 0.055Mm (2.2 to 2.3 Sm/d) (6) <br />Em (in terms of Sm/d) (7) <br />(1.2 to 1.4 Sm/d) <br />0.0170.012 0.014 <br />0.007 <br />0.018 <br />0.012 <br />0.029 <br />Sm = a • t (4) <br />8.46.0 <br />-- <br />0.020 0.028 0.033 0.041 <br />0.6 0.6 --(a = Sm/t) <br />Sm/d (5) <br />0.005 0.008 <br />0.80.8 <br />0.006 <br />0.013 <br />0.6 <br />0.0130.011 <br />-- <br />15.6 <br />t = 10 ft t = 14 ft t = 10 ft <br />-- <br />0.4 <br />1.2 <br />4.8 <br />8.0 11.2 17.6 20.8 <br />0.1 0.1 -- <br />9.6 <br />0.1 <br />Parameter Panels E10 - E12 (t = 10 to 14 ft)Panels B12 - B13A (t = 12 ft)Sum of E & B Panels <br />Max <br />Scp = acp • t (3) <br />(acp=Scp/t) <br />1.0 <br />0.4 <br />1.4 <br />0.4 <br />-- <br />-- <br />-- <br />-- <br />Min <br />t = 14 ft <br />4.0 5.6 ---- <br />Break Angle (9) <br />Angle of Draw (9)19°19°19°19° <br />0°0°0°0°0° <br />5° <br />150150 <br />50 5050 50 <br />-0.030 <br />-0.007 <br />-0.042 <br />-0.009 <br />-0.049 -0.061 <br />-0.013 -0.016 <br />100 100 <br />-0.019 <br />-- <br />13.2 <br />0.077 <br />0.020 <br />0.8 <br />7.2 <br />0.057 <br />0.013 0.016 <br />0.046 <br />G:\WWE\831-032\921\Engr\Exhibit 60E\Tables\ <br />Table 3 Apache Rocks.xlsx <br />Wright Water Engineers, Inc. <br />Decemner 30, 2020 <br />Calc By: MO <br />Chkd By: JMK