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MINE <br />OPENING <br />X— CUT <br />0 <br />0 <br />o a <br />0 0.. <br />0 <br />O� 0 <br />0 00 <br />o: o oo. <br />00 <br />ROOF (Shale B Sandstone) <br />f CONCRETE <br />MINE <br />f <br />,9z,2 <br />9O • � v <br />Nc, <br />O 0,v .•• a <br />o <br />a <br />0 �� s <br />0. 0 0: �. <br />D 00 o <br />0 . COLLUVIUM o: <br />0 C) <br />COAL PILLAR I I COAL PILLARS ���'�,���� �,� 3ACKFILL MATERIAL <br />SEAL- <br />t <br />1 <br />a. <br />150 — 200 Feet _Gt <br />r — - - — — - - - -- <br />, <br />FLOOR (Shale & Sandstone) <br />Typical Section Showing The Mine Seal And Backfill Material <br />For Sealing The Mine Portals And Ventilation Entries <br />.� �4- -L (sac ( � <br />