DOI: 10.5593/SGEM2016/B12/S03.028


B. Borowka
Monday 12 September 2016 by Libadmin2016

References: 16th International Multidisciplinary Scientific GeoConference SGEM 2016, www.sgem.org, SGEM2016 Conference Proceedings, ISBN 978-619-7105-56-8 / ISSN 1314-2704, June 28 - July 6, 2016, Book1 Vol. 2, 213-220 pp

Dog headings are headings with a small cross-section in relation to their length. Depending on their purpose, headings may be divided into two main types – development headings (such as cross headings, drifts, inclined drifts) and preparatory headings – different types of galleries (coal gangways), cross-cuts, dip headings and rise galleries. The construction of these headings is a significant element in the investment process both in the case of newly established coal mines, as well as existing plants in which deposits at increasing depths are being developed. At average, from a few to ten-odd new headings of different type and purpose are being driven each year in a single coal mine. In estimating the costs of a given heading at the design stage, a considerable difficulty is posed by the precision of determining the characteristics of the geological and mining conditions, based on which the driving technology is developed. As the other publications of the author have exhibited, in cases where the geological and mining conditions are deteriorated, e.g. the number of tectonic displacements increases in comparison to the estimates, the driving costs may increase due to the necessity to use more densely distributed flexible lining and natural risks prophylactics. As a result, these activities lead to increased costs of materials and labour. The article presents the cost analysis of dog headings driven within the last few years in underground mining plants of the Upper Silesian Coal Basin. The structure of costs was characterized based on the so-called cost centres that allow for the analysis of the mining process in its basic cells – indirectly related to the geological and mining conditions. An attempt has been also made to link the costs of the driven headings with the intensity of the geological and mining dislocations and natural risks. The method of characterizing costs presented in the article is commonly applied in mining plants and allows to rapidly process and compare the individual cost elements of a given investment. No data processing system exists, however, that would compare the costs resulting from the variability (usually deterioration) of the geological and mining conditions. Such a system would concern e.g. the comparison of costs of support material as estimated and as borne while conducting the investment (e.g. in which the supports had to be distributed more densely).

Keywords: coal mine, dog headings, cost analysis