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9.3.6.2 Description of Disposal System <br />In the design of an economical, functional and environmentally • <br />acceptable stowage system, site specific conditrons need to be <br />rn n.S!~-!r"-n~- pmOn~l tFl r: fnr~(-fir.^, ana~\"~r~ Ln rlnc~rif?°. ~n il~~n qr nb~j ran <br />system were: <br />1. gradient and direction of dip of the coal seam being <br />mined, <br />2. refuse circuits in the preparation plant, <br />3. location of the area to be backfilled relative Co the <br />active miring areas, <br />4. existing mine ventilation, including ventilation of the <br />abandoned areas, <br />5. distance from the preparation plant to the proposed <br />backfillirig section, <br />6. difference in elevation between the preparation plant and <br />section to be backfilled, and <br />7. installation of emergency bypass features to avoid in- • <br />terruption of the preparation plant operatrng schedule. <br />Of particular importance is the ability to reclaim t}Le water used <br />in the slurry to pump the refuse from the dewatering preparation <br />plant into the mined out area. <br />It is proposed to dispose of the refuse into a poctron of the early <br />worked out area, separate from the rest of the mine, using a direct <br />hydraulic stowage system. <br />The stowage chamber will be located in the area indicated in Figure <br />4.3-7, and comprises the first trio sublevels to be mined. They are <br />located to be physically separ<~ted from the mine, by leaving a <br />pillar of coal above them, and by leaving a 120 foot coal pillar to <br />the east of them to contain the slurried refuse material. This <br />NCIG - Coal Ridge #1 4-48 ABC/1195/910509 • <br />