@ARTICLE{Morga_Rafał_Structure_2007,
 author={Morga, Rafał},
 number={No 1},
 pages={26-48},
 journal={Gospodarka Surowcami Mineralnymi - Mineral Resources Management},
 howpublished={online},
 year={2007},
 publisher={Komitet Zrównoważonej Gospodarki Surowcami Mineralnymi PAN},
 publisher={Instytut Gospodarki Surowcami Mineralnymi i Energią PAN},
 abstract={Coal characterized by relatively high phosphorous content (Pa) occurs in the examined seams, which is disadvantageous during coke production. The best properties has coal in seams 357/1, 360/1 and 401/1. Phosphorous content changes in a broad range from 0.006 to 0.220%, with the mean value from 0.05 I to 0.079%. Evaluation made with the use of kriging gave results differing from these values by 0.006%, at highest (seam 403/1). Variability of phosphorous content in the examined seams was determined as high, and only in the case of the most weakly recognized seam (404/2) it was determined as average. Variability structure shows twofold character. The first group comprises seams, in the case of which semi-variograms were approximated by linear, spherical or sum of spherical and Gaussian model (seams 357/1, 360/1, 361, 401/1 and 403/1). The second group consists of seams, in the case of which semi-variograms were approximated by single nugget effect model (seams 363 and 404/2).},
 title={Structure of variability of phosphorous content in exploited seams of bituminous coal in the Pniówek Mine},
 type={Artykuł},
 URL={http://journals.pan.pl/Content/133634/PDF/4_GSM_23_1_2007_Morga_Struktura.pdf},
 keywords={bituminous coal, phosphorous recovery, geostatistics},
}