Journal of the Institute of Engineers (India)- Mining Engineering Division Board (Half- Yearly): Vol.92 August'2011 - National - Kolkata- India Institute of Engineers (India) August'2011 - 31PP - 92 . ISSN: 0257-442X Subjects--Topical Terms: Mining Engineering/ Civil Subjects--Facted Index Terms: JournalInstituteEngineers(India)-MiningEngineeringDivisionBoard(Half-Yearly):Vol.92August'2011Mining Engineering/ Civil