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• 2.05.3(2) <br />Barrier pillars are blocks of coal which are deliberately not <br />extracted during the mining process in order to provide protection <br />or support to the mine entries or reserves. The Mine Plan includes <br />several barrier pillar types. They are as follows: <br />Main Entrv Barrier Pillars. These main entry barrier pillars will <br />be located on each side of the main entries to provide the <br />necessary support to keep the main entries open for the life of the <br />operation. <br />Panel Pillars. These pillars act as a partition to separate mine <br />panels. After a panel has been mined out its entries are sealed <br />and the combination of the seals and the panel pillars completely <br />isolate the mined out panel from the remainder of the mine. <br />The portals of the Bear No. 3 Mine are located at the outcrop of <br />the C-Seam. The portals have an equipment roadway and intake entry <br />which are common entries, a belt entry, and a ventilation return <br />entry. The ventilation return portal entry is where the mine <br />• ventilation fan is located. <br />Minims Sequence Description <br />Actual mining and development work for the Bear No. 3 Mine began <br />following approval by the Division and OSM in early 1982. <br />In 1982, a gob disposal area was established within the old works <br />of the C-Seam near the first east panel. This gob area was <br />established to dump rock and waste material cleaned up in the old <br />entries of the Edwards Mine and also for other development work, <br />gob work, etc., that may have to be accomplished during the life of <br />the mine. The location of this waste disposal area is shown on the <br />C-Seam Mine Plan Map (Map 9j. <br />Mining in the C-Seam was complete in mid 1989. Access to the B- <br />Seam was accomplished by the use of two rock slopes and a <br />ventilation opening developed from the C-Seam to the B-Seam to <br />allow men, materials, and coal to be transported underground with <br />little or no additional disturbance. <br />• <br />2.05-6 Rev. 11-30-93 <br />