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<br /> <br />5 <br />4 <br />3 <br />2 <br />1 <br />®~ <br />~~ 0 <br />-1 <br />~~ 2 <br />3 <br />-4 <br />1Vlm <br />I/ <br />~~O ~ South of Divide <br />~~ ao ~ o +E~ <br />/~% <br />a <br />0 <br />1 -Em <br />1 ~ South of Divide <br />~~ <br />0 <br />0 <br />0 02 0.4 0.6 0.8 <br />~~~ <br />1.0 12 1.4 1.6 <br />Figure 5. Graph showing maximum tilt (Mm) and horizontal strain (E,n) versus the mining panel <br />width to depth ratio (W/d). Tilt (circles) and horizontal strain (squares) far the West Elk Mine <br />subsidence monitoring network are shown with the average National Coal Board (1975) <br />longwall curves. New curves were developed for the South of Divide mining area. <br /> <br />