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Fr�C�-Pro�CRPim�rrekkit � ,��,, . W. �•caR '"��^�"`;:='r"'" "=�'� ,.. .°:� « �',�:fig <br />�sranaer Defaults <br />Panel specification - <br />Entry height [ft) F9 - <br />Depth of cover (ft) 11750 <br />Crosscut angle (deg) 90 <br />- Center -to -center entry spacing ,.F Pi <br />.FP1 P2 F <br />J 6 I i36 <br />I <br />9r Equal center -to -center spacing for all entries <br />Extraction ratio <br />Average extraction ratio (z) 23 2 <br />Entry width [ft) 120 <br />Crosscut spacing (ft) 200 <br />(center -to -center) <br />Number of entries F <br />Copy Clip $esults view Plan Help Cancel OK <br />Figure 8: The gateroad pillar configuration at panel 1 in Wolf Creek seam. <br />Reference <br />1. Gadde, M. M., Rusnak, J.A., Honse, J.A., and Peng, S.S. On rock failure criteria for coal measure <br />rocks. Paper in the proceedings of the 26tt' Intl. Conf. on Ground Control in Mining, WV Univ., <br />Morgantown, WV, 31St July - 2" d August, 2007, 361-369. <br />Page #11 <br />