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• 4. Roof Support. Once extraction has been completed, the newly <br />exposed roof will be supported by roof bolts. As mentioned <br />earlier, roof bolts will be either conventional 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 to the <br />face will prevent large accumulations of gases such as methane. <br />6. Clean-Up. Rib Bluffing and spillage will occasionally occur at <br />the working faces. The ribs will be shoveled or cleaned up <br />before the next cutting sequence begins. <br />7. Rock Dusting.The entries will then be rock dusted by hand or <br />machine to keep coal dust accumulations to a minimum. <br />Pillar Extraction. The cycle of mining for pillar extraction is the <br />• same as development, with the sequence of cuts changed. Pillars will be <br />extracted in sequence as room development continues on retreat toward <br />the main entries. A method of planned pillar extraction is shown on the <br />Mine Plan Map (Map 8). <br />Conservation of Coal Resource <br />Sunbelt will constantly strive in its mining to recover the maximum coal <br />tonnage that can be practically removed. The overall goal of Sunbelt <br />with respect to coal recovery is to go well beyond the due diligence, <br />ordinary care, and general accepted mining practices required to <br />maximize coal production. Maximizing coal production while minimizing <br />unnecessary costs are items that both the government and Sunbelt are <br />deeply concerned with during these times of high inflation and operating <br />costs. <br /> <br />2.05-12 <br />