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get them on the job as quickly and efficiently as possible. <br />Therefore, it is essential to develop a personnel transportation <br />system to meet this important requirement. <br />Materials transportation should also be considered a very signi- <br />ficant item in keeping operating costs low. In the case of hy- <br />draulic mining the volume of supplies moved is usually directly <br />related to the type of roof supports used. For instance, steel <br />arches are quite heavy and clumsy to transport in any numbers so <br />that where arches are used a very good supply system is required; <br />conversely, where roof bolts are used the movement of supplies is <br />minimal and therefore necessitates installation of a much simpler <br />supply system. NCIG will utilize a combined transportation system <br />utilizing battery powered monorails and diesel powered rubber tired <br />personnel and materials units. These units (monorail and rubber <br />tired) can compliment each other or operate independently. <br />9.2.1.2.5 Monitor water System <br />• The monitor water system is the key to the successful operations of <br />the mine, and must be designed, installed and maintained wit}1 great <br />care. The present 'norm' for mines working thick and steep coal <br />seams is to use appro;~imately 2000 to 3000 horsepower (HP) per <br />working monitor delivering 1500 to 2000 gallons per minute (gpm) of <br />water at between 1500 and 2000 pounds per square inch (psi) at the <br />working face. <br />Each coal seam has its own hydraulic cutting characteristics which <br />must be determined by a series of tests early in the engineering <br />study. After determining these hydraulic cutting characteristics <br />the water flow network can be designed to provide adequate water <br />pressures and quantities to each mining area to ensure that both <br />the coal cutting and transportation is carried out in an efficient <br />manner. It is essential to make sure that not only will the system <br />meet present design needs, but that it has sufficient built-in <br />. NCIG - Coal Ridge ql 4-7 ABC/1145/910509 <br />TR- 7 <br />