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<br />GROUND SURFACE <br />ZONE 4 <br />NEAR•SURFACE FISSURING ~~~::i'i:i~i'i:i~il <br />ZONE 3 <br />MINIMALLY AFFECTED OVERBURDEN <br />...... ZONE 2 <br /> <br />°'1 rVVVI/LL /L/ VL <br />MINING HORIZON <br />EXTRACTED SEAM <br />E 1 U HEIGHT, m <br />1 <br />EXTRACTION ZONE <br />- DRaWlNG NOT TO SCALE- <br />D/STR/BUT/ON OF <br />SUBS/DENCE EFFECTS /N OVERBURDEN <br />F/GURE 6/ <br /> <br />