Extraction Plan - Peabody Energy
Extraction Plan - Peabody Energy
Extraction Plan - Peabody Energy
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<strong>Extraction</strong> <strong>Plan</strong> – North Wambo Underground Mine Longwalls 7 and 8Table 21 (Continued)Longwalls 7 and 8 Monitoring Program SummaryManagement <strong>Plan</strong> Monitoring Component Parameter FrequencyBuilt FeaturesManagement <strong>Plan</strong> –Prescribed DamManagement <strong>Plan</strong>South Wambo Dam.Underground Workings.• Survey to mark out the point at which the SouthWambo Dam inundation area can be maintainedoutside of the Longwall 8 angle of draw. 3• Survey to identify the initial condition of SouthWambo Dam (e.g. embankment). 3• Extent of South Wambo Dam storage (e.g. areaof inundation). 3• Visual inspections of the condition of the SouthWambo Dam embankment. 3• Visual inspections of underground workings(including longwall progression and geologicalfeatures encountered). 3• Rate of water pumped from North WamboUnderground Mine roadways. 3• Prior to secondary extraction withinthe South Wambo Dam NotificationArea.• Prior to secondary extraction withinthe South Wambo Dam NotificationArea.• Weekly inspections duringextraction of Longwalls 7 and 8.• Weekly inspections commencingwhen secondary extraction is withinthe Prescribed Dam NotificationAreas and undertaken until theactive mining face is 100 m past theNotification Area.• Daily inspections during extractionof Longwalls 7 and 8.• When pumping is required.EP/SMP LW7-8 Rev B December 2012 Page 52