Planning the Kotre Basantpur-Pachmo Coking Coal Mine

摘要

The contiguous Kotre Basantpur and Pachmo (KBP) coal blocks in the Hazaribagh District ofrnJharkhand State in east India are being developed by Tata Steel Limited (Tata Steel) to supply cokingrncoal to a new steel mill at Kalinganagar in Orissa.rnThe planning challenges are many. The multiple coal seams range in thickness up to 6 m and extendrnto nearly 500 m depth, with dips up to 25° and highly variable quality. Several normal faults withrnthrows up to 150 m intersect the deposit. There is little room for waste dumping on the lease, severalrnlarge nalas (seasonal creeks) cross the blocks, and the KBP leases are not contiguous with Tata Steel’srnexisting mining operations at West Bokaro. Geotechnical conditions, while not well defi ned at thisrnstage, are largely unfavourable. There are several villages on the blocks, and extensive paddy fi elds.rnIn 2009, Adelaide Mining Consultants Pty Ltd (AMC) completed a Detailed Project Report (DPR)rnfor a production level of 8 Mt/a. A terrace mining system was proposed using 28 m3 hydraulicrnexcavators and 185 t trucks working horizontal up-dip slices. Subsequently the viability of in-pitrncrushing and conveying was assessed, but the full results were not available for this paper.rnIt is planned to extract a total of 147 Mt of raw coal at a strip ratio of 5.2 bank cubic metres per tonnern(bcm/t). The planned maximum pit depth is over 300 m.rnThe project includes a washery, a 2 × 25 MW fl uidised bed power station to utilise all the coarsernwashery rejects, and a railway spur line to carry the washed coal to the railhead some 7 km distant.