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March 21, 2014 <br />Page 39 <br />Design <br />Depth of Cover, ft <br />Mining Height, <br />ft <br />7 <br />9 <br />11 <br />12 <br />13 <br />14 <br />15 <br />16 <br />17 <br />18 <br />19 <br />20 <br />21 <br />100 <br />68 <br />87 <br />106 <br />116 <br />125 <br />135 <br />144 <br />154 <br />164 <br />173 <br />183 <br />192 <br />202 <br />140 <br />72 <br />87 <br />106 <br />116 <br />125 <br />135 <br />144 <br />154 <br />164 <br />173 <br />183 <br />192 <br />202 <br />180 <br />84 <br />98 <br />111 <br />117 <br />125 <br />135 <br />144 <br />154 <br />164 <br />173 <br />183 <br />192 <br />202 <br />220 <br />95 <br />111 <br />126 <br />134 <br />141 <br />148 <br />155 <br />162 <br />169 <br />176 <br />183 <br />192 <br />202 <br />260 <br />105 <br />1231 <br />141 <br />1491 <br />1581 <br />166 <br />1741 <br />182 <br />1901 <br />198 <br />2051 <br />213 <br />221 <br />300 <br />115 <br />136 <br />155 <br />165 <br />174 <br />183 <br />192 <br />201 <br />210 <br />219 <br />227 <br />236 <br />245 <br />340 <br />128 <br />147 <br />169 <br />180 <br />190 <br />200 <br />210 <br />220 <br />230 <br />240 <br />249 <br />259 <br />268 <br />380 <br />142 <br />163 <br />183 <br />194 <br />205 <br />216 <br />227 <br />238 <br />249 <br />260 <br />271 <br />281 <br />292 <br />420 <br />156 <br />179 <br />201 <br />212 <br />222 <br />233 <br />245 <br />257 <br />268 <br />280 <br />292 <br />303 <br />315 <br />460 <br />169 <br />196 <br />221 <br />233 <br />245 <br />256 <br />267 <br />278 <br />289 <br />300 <br />313 <br />325 <br />338 <br />500 <br />183 <br />2131 <br />241 <br />2541 <br />2681 <br />2801 <br />2931 <br />3061 <br />3181 <br />3301 <br />3421 <br />354 <br />365 <br />540 <br />196 <br />230 <br />261 <br />276 <br />2911 <br />3051 <br />3191 <br />3331 <br />3471 <br />3611 <br />3741 <br />388 <br />401 <br />580 <br />210 <br />2461 <br />2811 <br />2971 <br />3141 <br />3301 <br />3451 <br />3611 <br />3771 <br />3921 <br />4071 <br />422 <br />437 <br />uoai strengtn, psi izi <br />480 <br />420 <br />360 <br />c <br />S <br />300 <br />Q <br />J <br />J_ <br />a 240 <br />m <br />3 <br />0 <br />w <br />a <br />180 <br />cJ <br />w <br />a <br />120 <br />60 <br />0 <br />Mmfng wiatn, tt 11.ou No. web pillars 19 <br />Pillar widths in italics ha\,e width -to- height ratios of 0.8 <br />I <br />{ <br />I II <br />40 <br />35 Mining <br />Height, <br />ft <br />30 0 7 <br />x 9 <br />S <br />F <br />25 a —- 11 <br />W 12 <br />J <br />J <br />20 13 <br />a <br />m <br />14 <br />0 <br />w 15 <br />15 K <br />D <br />a 16 -� <br />w <br />17 <br />10 —�— 18 <br />�19 <br />5 20 <br />21 <br />0 <br />50 150 250 350 450 550 <br />DEPTH OF COVER, ft <br />Figure 29a. Web Pillar Design Chart —South Taylor Pit, G7 and G8 Seams <br />Agapito Associates, Inc. <br />