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For the determination of level of radioactive background and specific radioactivity concentrations of 238U, 232Th, 40K in soil, coal and ash samples from Baganuur district of Ulaanbaatar city in Mongolia, was used HP-Ge gamma-spectrometer. Results of measurements of natural and man-made radioactive nuclides in soil, coal and ash samples were presented. The level of radioactive background and specific...
Indonesia produces over 350Mt of clean coal in 2012 and is the second largest coal exporter to Japan, accounting for 30 Mt/y. Almost of the coal produced is from open cut mines. Mining operation of open cut mines gives serious impacts on surrounding environment. Therefore, an appropriate rehabilitation program has to be taken into consideration when the mine plan is designed. The basic concept of...
This paper presents the new theoretical method to estimate the strain and deformation through the depth of freezing depending on surface temperature and the type of the soil. Such method would be beneficial for preliminary analysis on stability of foundations and structures built in deep freezing soils.
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