nitrogen oxides and carbon monoxide gases together with dust are known as the major pollutants arising during the blasting operations using the ammonium nitrate-fuel oil (anfo) explosive at the sungun surface mine, located in the northwest of iran. the pollutants were monitored during some blasting operations at the mine. it was concluded that the gases and dust clouds initially went up to the ...

The influences of coal-mine hollow fills and associated settling ponds in three headwater streams were assessed in southern West Virginia, USA. Fill drainage waters had elevated conductivities and metal concentrations, compared to a regional reference. Benthic macroinvertebrate richness was not affected consistently by the hollow fill drainages, relative to a regional reference, although a more...

Many uses of data mining, such as clustering, classification, the construction of decision trees, subgroup discovery and itemset mining, often fail to be able to cope with real-valued data well. In fact, it is common for data mining methods to only work well on nominal data with little different values. We build the theory to fill this gap for data from arbitrary uncountable sets and introduce ...

This article summarizes new findings of the East Kootenay project after completion of 2 months of fieldwork in the Yahk map area (82F/I) in 1994. The project was initiated in 1993 to provide 130 000-scale geological maps with improved stratigraphic correlations, and to stimulate base metal exploration southwest of the Sullivan mine. Work in 1994 focused on fill-in traverses and measured sect...

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Rib spalling of loose thick coal wall seriously restricts the high yield, efficiency mine, affecting safety production mine. Based on engineering background water injection to control rib seam in Luling Coal Mine Huaibei Mining Group, mineral composition and microscopic morphology III811 were analyzed by X-ray diffraction scanning electron microscope. Through uniaxial compressive strength tests...

Metal price is one of the most important parameters in the calculation of cut- off grade. The cut- off grade has the main role in determination of mine layout. Mine layout actuates mineable reserve, mine life and economic profitability. Not considering the uncertainty in metal prices can lead to a non-optimal layout. In this paper optimum underground mine layout is determined by expected utilit...