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Table 4. Superior Highwall Miner parameters. <br />Parameter Value <br />O ening width 1 l.~ ft <br />Minimum minim height 50 in <br />Maximum mining height (single ass) 10.5 ft <br />Levelin° ca abilities 36-in lift c Minders, 2 on front; 2 on back <br />Lift cylinder centerline. side-to-side 22.3 ft <br />Lift cylinder centerline; front-to-back 32.3 ft <br />Maximum leveling capability; side-to-side 7.6° <br />Maximum leveling capability; front-to-back 5.3° <br />Maximum tramming incline 12° <br />Pushbeam flexibility 1.5` vertical. 0.5° lateral <br />Platform steering capability Crawlers rotate±37° <br />A ro riate Seam geometry: <br />Maximum practical sidedip 3° be pond ]evelin ca abilit (total 10.6°) <br />Maximum practical downdip 12° <br />Maximum angle off highwal] 1 18°-20° <br /> <br />The parameters that have the most immediate implications for the Seneca Mine <br />are the maximum practical side and downdips, and the capability of the machine to work • <br />at an angle off the highw~all. To estimate how much of the Seneca IIW and Yoast reserve <br />areas are minable with the Pi\9 considering the seam dips present, NSA calculated the <br />downdips and sidedips that will be encountered for each mining area planned (see <br />Figures 5 and ] 6 for area locations). The effective dips were minimized by turning the <br />machine off of perpendicular to the highwal], at an angle up to a maximum of ±20°. <br />Results are shown in Tables 5 and 6. Shaded areas in the tables appear to be unminable, <br />either because of dip (do~a~ndips in excess of 12`, or sidedips in excess of 10.6°), or <br />thinning of the seam. <br />u <br />Seneca Coal Company ~ NSA Eneinezrin¢. Inc. <br />Hi¢hwa0 Mine Des~n Report June ?003 <br />