Saikia, Kalyan (2006) Geostatistical modelling of mica peridotite intrusive affected coal in seams of putki ballihary area, jharia coalfield vis-a-vis possible resource utilization in cement industry. Journal of Mines, Metals & Fuels, 54 (1&2). pp. 16-21. ISSN 0022-2755

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Mica peridotites occurring as igneous intrusive bodies in Jharia coalfield frequent the coal seams and associated strata extensively as sills, dykes and invarious other forms of highly variable geometric shapes and dimensions. Such intrusion resulted in baking and burning of coal to a product locally called jhama. This paper provides an application of statistical and geostatistical modeling techniques to the distribution of thickness of mica peridotite intrusive affected coal (i.e. jhama) in seams of Putki Ballihary area of Jharia coalfield. The study involves generation of lithologs of various boreholes correlation of jhama thickness associated with coal seams in various borehole intersections and spatial variation modeling of jhama thickness for gaining an understanding of the distribution of its lateral continuity. Frequency distribution analyses of thickness of jhama that are associated with coal seams XIII and XIV revealed negative skewness supporting the dominance of higher value thickness. Computation of omni-directional experimental semi-variograms revealed regionalized phenomena. Modeling of omni-directional experimental semi-variograms provided a spherical function fit for thickness indicating that the thickness values are correlatable within the range of influence of semi-variograms and are independent beyond the range. Geostatistical estimation employing block kriging technique provided thickness spatial distribution maps of jhama associated with coal seams XIII and XIV in Putiki Ballihary area. Such spatial distribution maps of jhama associated with coal seams are of immense use for assessment of jhama reserves, determining conditions of jhama mining and also for providing possible alternative means to usage of jhama as fuel in cement industry.

Item Type: Article
Subjects: Geo-Mechanics and Mine Design
Depositing User: Dr. Satyendra Kumar Singh
Date Deposited: 20 Dec 2011 05:17
Last Modified: 20 Dec 2011 05:17

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