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"D" Seam Longwall Subsidence Page 58 August 17, 1998 <br />• The minimum nearly 200 feet of interburden and the 60$ <br />sandstone in the interburden will also dissipate any stress <br />concentrations above barrier pillars in the abandoned underlying <br />high-extraction advance and retreat room and pillar mine workings <br />and prevent multiple-seam stress concentrations from adversely <br />affecting the planned "D" Seam workings. <br />The landslide located over the extreme southwest corner of <br />Panel #3 and southeast corner of Panel #9 (Junge, 1978) should not <br />be destabilized by the predicted surface subsidence. The north to <br />south mining of the longwall panels should result in a minor <br />increase the stability of the landslide mass because the <br />subsidence will tilt the south facing ground surface slope <br />containing the landslide back into the slope. <br />• <br />• <br />58 <br />