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"D" Seam Longwall Subsidence Page 41 August 17, 1998 <br />• Figure 6. Predicted surface subsidence for crushing of gateroad <br />pillars (from Abel 6 Lee, 1984). <br />PREDICTED MAXIMUM SUBSIDENCE <br />OVER GATEROAD CENTERLINE <br />• <br />4 <br />m <br />w <br />U <br />Z <br />W <br />D <br />H <br />m <br />ai 3 <br />2 <br />500 1000 1500 2000 2500 <br />DEPTH BELOW SURFACE (feet) <br />ai <br />