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MINING BOTTOM WITHOUT ADDITIONAL SUPPORT <br /> <br />1. Bottom coal may be recovered in retreat method as shown on [he attached <br />drawing (Page 13B). <br />2. Additional safety precautions for mining bottom coal for gobbing of rock: <br />A. Areas where bottom coal has been removed after initial mining for <br />the gobbing of rock will be considered impassable until backfilled <br />and will be marked with danger signs. <br />B. Bottom coal will not be mined in areas where ventilation needs to be <br />advanced. <br />C. Mining equipment with canopy and rib protection must be removed from <br />bottom coal removal area before operators enter or leave the protec- <br />tion of the canopy. <br />i'"~ <br /> <br />3. Bottom coal will not 6e removed from any area that would interfere with <br />safe passage in primary or secondary escapeways. <br />r <br />Page Thirteen <br />Initial 11/01/86 <br />