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• 2.05.3(2) <br />4. Roof Support. Once extraction has been completed, the <br />newly exposed roof will be supported by roof bolts. As <br />mentioned earlier, roof bolts will be either conventional <br />or resin bolts. <br />5. Ventilation. After roof support has been established, <br />ventilation will be restored to the face by rehanging and <br />extending brattice or vent tubes. Restored ventilation <br />to the face will prevent large accumulations of gases <br />such as methane. <br />6. Clean-up. Rib Bluffing and spillage will occasionally <br />occur at the working faces. The ribs will be shoveled or <br />cleaned up by a scoop before the next cutting sequence <br />begins. <br />7. Rock Dusting. The entries will then be rock dusted by <br />hand or machine to keep coal dust accumulations to a <br />• minimum. <br />Pillar Extraction. The cycle of mining for pillar extraction is <br />the same as development, with the sequence of cuts changed. <br />Pillars will be extracted in sequence as room development continues <br />on retreat toward the main entries as shown on the B-Seam Mine Plan <br />Map (Map 9A). A method of planned pillar extraction is shown on <br />the B-Seam Mine Plan Map (Map 9A). <br />Conservation of Coal Resource <br />The Operator constantly strives in its mining to recover the <br />maximum coal tonnage that can be practically removed. The overall <br />goal of the Operator with respect to coal recovery is to go well <br />beyond the due diligence, ordinary care, and general accepted <br />mining practices required to maximize coal production from its <br />Federal leases. <br />• 2.05-14 Rev. 11-30-93 <br />