Laserfiche WebLink
1 <br />1 <br /> <br /> <br /> <br />1 <br /> <br />1 <br /> <br />TABLE 2-3 <br />MINE WATER BALANCE <br />WATER IN GALLONS/YEAR GALLONS/MIN <br />Production Equipment 14,762,400 28.09 <br />Ventilation Humidify 11,216,818 21.34 <br />Seeps 18,019,635 34.28 <br />Incidental (pipe leaks, road) watering, wash down 5,063,700 9.63 <br />_.~a.-.-.. -~-,,_.~.~--- - - -- -- - -- - - <br />s.::f::. <br />TOTAL -..- _ ~, ,~._ .an 49 553H .~~ 93.95.'K n~.w <br />WATER OUT <br />Coal Surface Moisture 6,014,815 11.44 <br />Ventilation Humidity 24,736,068 47.06 <br />Pum ed Out 18,311,670 34.84 <br />-a..P~- <br />.- <br />e <br />,~- <br />- <br />~.._._._-- - - ---- - ------- --- <br />-- <br />-~-- <br />- <br />- <br />~- <br />_ <br />a <br />- <br />- t:_ g~~ <br />~ <br />- - - <br />~ <br />-- <br />t.:._:-: ~as:..-. _ <br />---- <br />- -- <br />Ippolnp Water The production equipment utilizes water for dust control and cuttings removal in <br />' roof bolting. Water used by equipment is based on 331 shifts worked by continuous miner <br />sections and 170 shifts worked by the longwall. The continuous miner sections use 80 gpm and <br />operate about 3 hours per shift (the rest of the time is spent moving, etc.). The longwall <br />' equipment uses 140 gpm of water for about 7 hours per shift. <br />The amount of water entering the mine as ventilation intake air humidity is based on monthly mean <br />temperatures from Figure 11.C-2 on page II.C-9 of the Mining Permit and the yearly mean relative <br />humidity of 569'o found on page II.E-1 of the Mining Permit. The absolute humidity, the actual <br />' amount of water in the air, is calculated from these data and an average ventilation quantity of <br />525,000 cubic feet per minute. <br />' The amount of water entering the mine from the surrounding strata is partially estimated by <br />identifying all known seep areas and estimating the flow rate from each. During January 1994, <br />a survey of the accessible areas of the mine workings was conducted to identify the location and <br />flow rates of all seeps. The locations and flow rates of the seeps are shown on Plate 1. Due to <br />the very low flow rates measured, the flow rates are shown in gallons per day. Most, rf not all, of <br />' this water leaves the mine in the form of humidity in the ventilation air flow. There are very few <br />1 <br />11 <br />1 <br />