Subrata Dutta - Academia.edu (original) (raw)
Highly experienced rock excavation designer in mining , tunelling ,stratigic caverns,mine filling, ground monitoring static
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Botswana International University of Science & Technology
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Proceedings of the International Seminar on Design Methods in Underground Mining, 2015
Ore dilution has been a major operating challenge in the underground open stoping operations at S... more Ore dilution has been a major operating challenge in the underground open stoping operations at Sindesar Khurd Mine of Hindustan Zinc Ltd, India. The impact of ore dilution, affecting both the direct and indirect cost of production, has been detrimental to the economics of the mine showing chances of exponential effect in hampering profitability. The authors provide an overview of the various issues influencing dilution in the underground operations. This paper highlights the stages of stringent orebody delineation, grade modelling/contouring, proper stope development, scientific stope design and sequencing, controlled drilling and blasting, and improving mine management. It reviews the entire system improvement that has steadily resulted in effective reduction in planned dilution (
Minerals constitute the back-bone of economic growth of any nation and India has been eminently e... more Minerals constitute the back-bone of economic growth of any nation and India has been eminently endowed with this gift of nature. Over the past 50 years, there has been a steady increase in mining activities. Today there are over 594 coal mines and more than 6,000 metaliferrous mines and 41 oil projects, excluding the offshore installations. Mining activities in the country however remained primitive in nature and modest in scale until the last decade of 19th century. With the progress in exploitation of minerals, safety of persons employed became a matter of concern. The death rate for every 1000 persons in mines in 1894 was as high as 3.04. In 1895, the Government of India initiated steps to frame legislative measures for safety of workmen. In 1897, in the first major mining disaster 52 persons were killed in a shaft accident in the Kolar Goldfields followed by the Khost Coal Mine disaster in Baluchistan (now in Pakistan) killing 47 persons. State intervention in respect of safety and health of mine workers has brought about significant fall in accidents causing fatalities and injuries. The fatality rate in respect of per thousand persons employed in coal mines fell from a high of 1.33 on a ten yearly average during 1931-40 to 0.33 during 1991-99. Unfortunately, however, there has been no appreciable reduction in fatal accident rates in coal mines during the last two decades. India's safety statistics reported more than59 deaths (18 underground) in coal mines in calendar year 2012, and 294 serious injuries. The same is true in case of non-coal mines where the fatality figure has remained static at about 0.3. Non-coal mines have fared better with 25 deaths (4 underground) and 32 serious injuries in 2012.
Proceedings of the International Seminar on Design Methods in Underground Mining, 2015
Ore dilution has been a major operating challenge in the underground open stoping operations at S... more Ore dilution has been a major operating challenge in the underground open stoping operations at Sindesar Khurd Mine of Hindustan Zinc Ltd, India. The impact of ore dilution, affecting both the direct and indirect cost of production, has been detrimental to the economics of the mine showing chances of exponential effect in hampering profitability. The authors provide an overview of the various issues influencing dilution in the underground operations. This paper highlights the stages of stringent orebody delineation, grade modelling/contouring, proper stope development, scientific stope design and sequencing, controlled drilling and blasting, and improving mine management. It reviews the entire system improvement that has steadily resulted in effective reduction in planned dilution (
Minerals constitute the back-bone of economic growth of any nation and India has been eminently e... more Minerals constitute the back-bone of economic growth of any nation and India has been eminently endowed with this gift of nature. Over the past 50 years, there has been a steady increase in mining activities. Today there are over 594 coal mines and more than 6,000 metaliferrous mines and 41 oil projects, excluding the offshore installations. Mining activities in the country however remained primitive in nature and modest in scale until the last decade of 19th century. With the progress in exploitation of minerals, safety of persons employed became a matter of concern. The death rate for every 1000 persons in mines in 1894 was as high as 3.04. In 1895, the Government of India initiated steps to frame legislative measures for safety of workmen. In 1897, in the first major mining disaster 52 persons were killed in a shaft accident in the Kolar Goldfields followed by the Khost Coal Mine disaster in Baluchistan (now in Pakistan) killing 47 persons. State intervention in respect of safety and health of mine workers has brought about significant fall in accidents causing fatalities and injuries. The fatality rate in respect of per thousand persons employed in coal mines fell from a high of 1.33 on a ten yearly average during 1931-40 to 0.33 during 1991-99. Unfortunately, however, there has been no appreciable reduction in fatal accident rates in coal mines during the last two decades. India's safety statistics reported more than59 deaths (18 underground) in coal mines in calendar year 2012, and 294 serious injuries. The same is true in case of non-coal mines where the fatality figure has remained static at about 0.3. Non-coal mines have fared better with 25 deaths (4 underground) and 32 serious injuries in 2012.