Laserfiche WebLink
Subsidence Handbook Volume III, Exhit~it 15 • <br />Mass Movement Features - LANDSLIDES <br />Introduction <br />It is not expected that subsidence will adversely effect the stability of old landslides to the <br />extent that their deformations could be renewed. Attention will have to be paid to mining <br />close to the coal outcrop. The operator will leave one row of development pillars between <br />the outcrop and extracted pillars within the panel. <br />Worst-Case Damaoe <br />Subsidence could rejuvenate or cause a new landslide that could pose a hazard to the <br />mine facilities, public health and safety, and the environment. <br />Pre-Damage Monitoring <br />The operator will visually inspect known historic and modern landslides with the monitoring <br />frequency increased during the period immediately before retreat extraction in the • <br />immediate proximity of any landslide. <br />Post-Damage Monitoring <br />Post-Damage monitoring will be conducted like pre-damage monitoring. <br />Mining Techniques <br />Longwall or conventional room-and-pillar mining with pillar extraction will be performed. <br />The operator will leave one row of development pillars between the outcrop and extracted <br />pillars within the panel to prevent the potential crushing, sliding, or other failure near the <br />outcrop which could rejuvenate or cause a landslide. <br />Repair Procedures <br />Repairs wi11 be completed by appropriate earth-moving equipment when damage occurs <br />if required. <br />-._J <br />PR-04 42 10/00 <br />