Sustainable lignite resource planning at Thar coalfield, Pakistan

摘要: Thar coalfield is a new in Pakistan with estimated lignite resource of more than 175 billion tons. Resource planning an essential part the strategic plan for optimal and economical exploitation lignite. Main objective present research to assess as single deposit identify areas suitable surface mining, underground mining waste dump at coalfield. The cumulative stripping ratio distribution map has been developed coalfield, covering area 1691.04 km2 around 12 exploratory blocks. Lithological data 693 drill holes have used calculate every borehole, which varies from 3.7 m:m 88.1 average value 12.85 m:m. Cumulative divided into six ranges, viz: 4–6, 6–8, 8–10, 10–15, 15–20 >20 Contours are digitized all boreholes showing various ranges ratios. From map, it concluded that 665.72 area, constitutes 39.37% total assessed 989.82 constituting 58.53%, appropriate outside dumps. Whereas, 2.1% no coal zone, only dumping. may be guide preparation master