Nnnopen pit blasting pdf files

Dangers of toxic fumes from blasting centers for disease. Cast blasting involves loading a blast pattern with a larger amount of. Key quotes from appendix d9 bgc 20090430 design criteria draft. Video taken with my bb cleverly propped up under a crusher. The water desensitises a proportion of the fuel, upsetting the oxygen balance and resulting in the production of nitrous oxides. However, secondary blasting is the most expensive type of blasting. Secondary blasting can be done by pop shooting blockholing and plaster shooting mudcapping. Rock blasting and control overbreak fhwa us department of. In hard rock mining, blasting is the most productive excavation. The composition of explosives is balanced chemically to produce the desired effects in blasting. The evaluation method is generally ordinary kriging with mining block sizes ranging from 10 x 10m to 100 x 100m to 250 x 250m in the plan view. This memo describes the drilling and blasting operations at ksm for the. Optimization of blasting design parameters on open pit.

The main objectives of presplitting in open pit mining are. Confinement of the explosive not only results in reductions of air blast and seismic effects, but. By definition, bench blasting is blasting in a vertical or subvertical hole or a row of holes towar ds a free. A read is counted each time someone views a publication summary such as the title, abstract, and list of authors, clicks on a figure, or views or downloads the fulltext. Technologies for optimizing drilling and blasting in open pit mines m. Therefore to cut down the cost of production optimal fragmentation from properly designed blasting pattern has to be achieved. Optimisation of the drill and blast work in the open pit rabenwald. Presplitting is a controlled blasting technique with applications in open pit mines.

Shaped charges are sometime used in secondary blasting, but this is much more expensive. Optimization of blasting design parameters on open pit bench a case study of nchanga open pits victor mwango bowa abstract. Appropriate blast design is important in order to lessen the production of over size. Cast primers for blasting caps and detonating cord. The objectives and mechanics of control blasting are discussed. Technologies for optimizing drilling and blasting in open. Blasting pdf files you can use in your safety training programs.