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Assessment of Maximum Explosive Charge Used Per Delay in Surface ... locations in and around a major coal producing opencast coal mines in India. 100 blast vibrations records were ... This has led to the substantial increase in the consumption of explosive. When an explosive detonates in a blast hole, a tremendous amount of


industry. Locally, the overall mining cost inflation indices shows a yearly increase of 2% over the national consumer inflation. In order for coal mines to survive and mine profitably, they need to capitalize on the opportunity to improve their productivity and focus on one factor they can control: operational efficiency.


During the research on bench deep-hole blast casting, the blast-casting parameters are directly related to the blast-casting results, so it could reveal the mechanism for improving the effect thereof. Based on the principle of the plane charge method, both the stress wave and detonation gas were considered to affect rock fragmentation and casting, a model of overburden …


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Surface Mine Blasting - OSMRE

SURFACE MINE BLASTING Proceedings: Bureau of Mines Technology Transfer Seminar, Chicago, IL, April 15, 1987 Compiled by Staff, Bureau of Mines ABSTRACT The Bureau of Mines has sponsored a comprehensive research program to enhance the safe, effective, and efficient use of blasting technology by the mining industry.


Dec 22, 2009· NOTE ON ELECTRONIC DETONATORS The mining and explosive industries rapidly adopting new technology, in all forms, in order to improve overall performance, efficiency and cost effectiveness.


Such slurry explosives for use in underground coal mines have to be cap-sensitive and approved by the DGMS, The slurry explosive is highly water resistant. In the quarries holes of diameter 62 mm and above are economical for use of slurry, just as for ANPO, if it has to be poured into bolthole.


Drill-to-Mill plant optimisation projects help improve productivity and reduce total mining costs: During the past twenty years, some consultants and research centres have been involved in implementing a holistic methodology "Mine to Mill" to maximise the overall profitability of the operation rather than just optimising any individual process in a mining operation.


3. What are the KPIs on other mining processes that must be kept to ensure an Explosives Value in Use program is capable of being valued as responsible for the blasting outcomes and mine's overall improvements. 4. How has drone muck pile surveying been translated to a blasting Value in Use program? 5.


Dec 31, 1995· Field investigations into blast design parameters of highly jointed rockmass of overburden: A case study of large opencast coal mine (India)


Blasting being one of the key activities of mining, its efficiency in terms of lower explosives consumption, improved rock fragmentation, decreased fly-rock, reduced noise and vibration level is very much desired for an effective mining operation which can be achieved by maximizing the utilization of explosive energy in the blast hole. Use of 'reverse plastic funnel' into the blast …


Explosives and blasting techniques play a significant role in efficient opencast mining operations. There have been constant technological developments towards safer, faster, economical and more ...


Jan 25, 2017· Except for very deep-seated deposits, open cast mining method has been recognized as the safest and most productive mode for mining minerals. Ever growing demand in minerals and coal has compelled the mine operators to increase the size of mine, which has resulted in an increasing trend towards large capacity open cast projects. Explosives and …


Jan 01, 2013· India has emerged as the third largest coal producer in the world after China and USA with a 9% share of the total global coal production. While the coal production from underground mining in countries like China, USA and Australia are about 95, 33 and 20% respectively, India produces only about 15% of coal from underground mines (Prasad 2009).


Mar 02, 2012· Blasting Practices at Open Cast Mines. One can easily say that the most important part in extraction from an open cast mine is blasting and by following some simple standard practices, a high degree of productivity can be attained. 1. Drilling: There are two major types of drilling techniques being used.


opencast mining, efficiency growth has been the most im-portant factor in the growth of underground mine productivi-ty (Kulshreshtha, Parikh, 2002). This suggests that under-ground mining must make use of technological advancements and utilize innovative mining techniques that suit the coun-try's specific geo-mining conditions.


Coal is the primary source of energy in India. Despite being the second-largest coal-producingcountry, there exists a significant difference in demand and production in India. In this study, the relativeefficiency of twenty-eight selected opencast mines from a large public sector undertaking coal companyin India for 2018–2019 was assessed and ranked by using data …


Based on official real GDP and labour input estimates from Statistics Canada, labour productivity in mining fell by 2.21 per cent per year between the 2000 cyclical peak and 2007, with capital ...


Drilling and blasting are the major unit operations in opencast mining. Inspite of the best efforts to introduce mechanization in the opencast mines, blasting continue to dominate the production. Explosives contribute currently about 5% of the direct cost of production and if the


Blast casting is a high-efficiency technique applied in surface mines for overburden removal and results in stripping cost savings. According to ballistic theory and center-of-mass frame basic movement principles, key factors influencing blast casting effect were analyzed, which include bench height and mining panel width, inclined angle of blast holes, explosive unit …


DIGISHOT® PRECISION IMPROVES EFFICIENCY OF CASTING OPERATIONS IN LARGE COAL MINES LEADING TO BIG SAVINGS DigiShot electronic detonators were used to confirm that accurate delay timing provided by precision electronic detonators correlates to improved explosive performance and an associated increase in effective overburden cast.


Martha Gold Mine, Waihi, New Zealand. Open Cast Gold Mine • Results Oversize percentage decreased by 50% Mine production improved 8% Excavator efficiency increased by 17% • Conclusion Mine converted to electronic system. O v er s i v e P r odu c ti on (%) Oversize Comparison. April July October December. Total Mine North Wall Pyrotechnics ...


Mar 22, 2011· It causes increase in production cost also due to wastage of explosive and blasting accessories. Poor fragmentation: -Deviation in drilling parameters (spacing, burden and depth) under drilling or over drilling, improper blast design, poor quality of explosive, misfire, fault in firing sequence of detonators and in its circuit etc. are main ...


Aug 28, 2015· Australian mining technology company Emergent Mining Technologies (EMT) launched its Reduced Energy Mining System (REMS) in May to increase the energy efficiency of opencast coal mines. The ...


4 Mining for efficiency The productivity doldrums 1 Formerly GBI Mining Intelligence, which was acquired by PwC in September 2013 Understanding why productivity fell following the commodity boom is a complex issue. There are a range of impacts arising from the increasing scale of open cut mines and complexity of mining operations, which may at


Method includes installation of additional tamping from loose finely dispersed material in upper non-charged part of shot holes directly above explosive charge (EC) for the length from 6 to 12 diameters of shot hole, and then hydraulic stem bag is provided in …


Fleet replacement to improve explosives delivery. By: Dennis Ndaba 12th May 2006 Soputh African opencast mining ... 13th May 2005 Industrial polymer …


FIELD: mining shot firing operations; production of an emulsion blasting explosives. SUBSTANCE: the invention is pertaining to the field of mining shot firing operations and may be used on the earth surface and in open cast mines, ore mines and coal pits, which are not gas- or dust-hazardous, using a manual and mechanical charging of the boreholes and blast-holes …


Aug 28, 2018· The use of a surface miner also has a positive effect on water management at an opencast mine. The cut surfaces are levelled and can be cut at an angle. Drainage is further improved as a result ...


Noise, which is originated by airblast, causes discomfort and gives rise to complaints from those living close to the mines. In Indian context, as the opencast mines are closely situated near the human habitations, the 'noise' from blasting has become a social issue of greater concern. Factors resulting into an air-blast and noise are: 1.


Sep 17, 2020· This is dominated by renewable energy, e-Mobility (electric vehicles), energy efficiency, new and future fuels, such as biofuels, and demand side management. " The mining industry is a major consumer of energy and is responsible for more than 40% of the total industrial energy use. In Sub-Saharan Africa, the energy intensive users group alone ...


production" efficient, there are urgent need to revisit the blasting technology used in the mine and find out the causes of poor fragmentation. There requires to investigate the accuracy of the blast design, proper explosives selection, explosives loading method, system of initiation, delay


explosives such as TNT, RDX, PETN, and Tetrile, and industrial explosives such as nitro-glycerine, emulsion, slurries, water gels, ANFO and other powder explosives. In opencast mining both vertical and inclined holes practiced with the bench face. The holes drilled in a row may be single or multiple.