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LJ <br />5 <br />4 <br />s <br />2 <br />0 <br />pq <br />-1 <br />� -2 <br />g <br />-5 <br />1VIM <br />i <br />> South of Divide <br />® E <br />1 � <br />( South of Divide <br />0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 <br />W/d <br />Figure 5. Graph showing maximum tilt (M and horizontal strain (E versus the mining panel <br />width to depth ratio (W /d). Tilt (circles) and horizontal strain (squares) for the West Elk Mine <br />subsidence monitoring network are shown with the average National Coal Board (1975) longwall <br />curves. New curves were developed for the South of Divide and Dry Fork mining areas. <br />0 <br />