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the feeder-breaker. High pressure pumping stations will be located <br />as close to the monitor sections as is practical or a main pumping • <br />station may be erected on the surface. Minus 6-inch coal will be <br />directed from the breaker to tl~e flume line. <br />The roof control plan involves two areas of interest, namely the <br />geotechnical characteristics of the footwall, hanging wall, and <br />coal; and the actual plan for supporting the hanging wall, and, if <br />necessary, the coal roof (Appendix 4.3-1). <br />During an intensive drilling program, (a total of 32,000 feet was <br />drilled in 24 drill holes) twc outside consulting firms were <br />contracted to investigate the coal and rock characteristics to be <br />encountered during our mining operation. The first was Seegmiller <br />International Mining Geotechnic:al Consultants which addressed the <br />strength characteristics of the coal and rock groups present, along <br />with questions concerning ground control conditions. Their report <br />shows moderate to high rock strengths, moderate coal strengths, and <br />acceptable ground control conditions. The other consultant was <br />Core Laboratories, Inc., which examined each drill hole for the <br />chemical characteristics of the coal and rock groups present. This <br />information showed favorable chemical analysis of the coal and rock <br />strata (Appendix 3.3-1). <br />The actual roof control plan i~as been prepared for submittal to <br />MSHA. The Seegmiller report indicates that roof support will not <br />be difficult. The plan will be in accordance and comply with MSHA <br />regulations and Colorado Division of Mines standards. <br />Retreat shall be from the crown pillar or panel above, to the panel <br />below, operating in several sub-levels simultaneously and in <br />echelon, maintaining a uniform caving line. where the two Wheeler <br />seams spilt, the Upper wheeler would proceed slightly ahead of the <br />Lower Wheeler to prevent premature pressures appearing ahead of the <br />working face in the Lower Wheeler. Some hanging wall pressure on <br />• <br />NCIG - Coal Ridge #1 4-16 ABC/1145/910509 • <br />