Górnictwo i Geoinżynieria
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ISSN 1732-6702
Issue Date
2007
Volume
R. 31
Number
Nr 2
Description
Journal Volume
Górnictwo i Geoinżynieria
R. 31 (2007)
Projects
Pages
Articles
Procedury badawcze maszyn górnictwa odkrywkowego wprowadzanych na rynek Unii Europejskiej
(2007) Alenowicz, Jerzy
Questions connected with location of surface mining equipment on the European Union market as well as definitions of elementary concepts and terms have been presented in the article. A complex assemblage of regulations referring to the principles of surface mining equipment location and usage on European Union market has been discussed. Primary obligations rested with a producer who locates surface mining equipment on EU market have been described. A short description of research in a range of estimation of conformity with New Approach Directives in the mechanical and electrical section has been presented. Risk assessment, as factor aiming at achievement of the highest possible safety level of the equipment, adequate for technology state and resulting restrictions, have been discussed. Rules of readjustment of machines operated currently to European Union regulations have been presented. Examples of research conducted by Poltegor Institute after European Union integration have been described.
Prognozowanie okresu bezpiecznej eksploatacji maszyn górniczych. Rozważania o degradacji obiektu
(2007) Augustynowicz, Józef; Dudek, Dionizy; Dudek, Krzysztof; Figiel, Andrzej
Selected aspects of the natural degradation process of the technical object were presented. Statistical estimation model of t he degradation parameters was proposed. This model should use diagnostic symptoms taken from the tensometry, the thermovision and the vibroacoustic testing
Ocena zaopatrzenia sosny zwyczajnej (Pinus sylvestris L.) w składniki pokarmowe w warunkach zwałowiska zewnętrznego KWB »Bełchatów«
(2007) Bajorek-Zydroń, Katarzyna; Krzaklewski, Wojciech; Pietrzykowski, Marcin
The aim of the work was to assess the Scots pine (Pinus sylvestris L.) nutrient supply in the first age group (of up to 20 years) growing on the top of the external slope in the Bełchatów lignite mine and in managed forests in the vicinity of the dump. The research was conducted on 60 experimental plots (10x10 m) in a chronosequence of 5-7, 9-11 and 12-14 years, with 10 repetitions for each age group on the slope and in managed tree stands. It was found that nitrogen was the most deficient element in the Bełchatów dump. Its average content ranged from 0.8 to 0.9%. Based on the results of pine high and needle length measurements it was established that satisfactory growth of the trees from this species took place when nitrogen content in its assimilation apparatus was at least 1.0% N. The content of other biogenes important for trees (Ca, Mg, K, P, S) was considered satisfactory in pine needles, however the phosphate content in the slope was visibly lower than in the assimilated material of pines from forests in the vicinity of the dump. The proportions of individual macroelements in pine needles were satisfactory and the mean content appeared in quantitative series characteristic for the species: N K Ca P Mg. The obtained results show that with the exception of nitrogen, the initial soils of the dump provide the majority of nutrients for the Scots pine introduced as part of the reclaim process.
Wybrane zagadnienia diagnostyki wielostopniowej przekładni zębatej ze stopniem planetarnym w układzie napędowym koparki kołowej
(2007) Bartelmus, Walter; Zimroz, Radosław; Sawicki, Wojciech; Maniak, Marek; Woźniak, Zbigniew; Furmaniak, Karol
The papers deals with selected issues of diagnostics of multistage gearbox with planetary stage used in driving system for bucket wheel excavator SRs 1200. This paper is one of results of cooperation between Wrocław University of Technology and Open Cast Mine »Konin« that is focused on diagnostic procedures for supporting maintenance of this strategic object. One of the most important issue is time varying external load that is observed during normal operation, it affects all stages of diagnostics process (measurements, signal preprocessing, feature extraction and reasoning). Diagnostics without load monitoring very often gives incorrect results (no detection of failures or false alarms). In the frame of mentioned cooperation a few experiments has been carried out, the idea of a diagnostic system with load as the criterion of adaptation of diagnostics has been proposed. In this paper the basic ideas of this system and initial results have been presented.
Rozwój technologii podziemnego zgazowania węgla i perspektywy jej przemysłowego wdrożenia
(2007) Bednarczyk, Jerzy
Underground coal gasification is a subject of intense experimental research in many countries. Published results, especially relating to pilotage plants, indicate that in the foreseeable future this technology may be employed for deposits exploitation in the area where opencast mining or underground mining is unprofitable. Low-incarbonizated brown coal occurring in Poland enables underground gasification because of high reactivity and high moisture content and because of shallow deposition of strata. Underground gasification may become competitive in relation to ground-based coal gasification installations. Elaboration of safe and effective technologies adapted for occurring geological and hydrogeological conditions as well as complicated instrumentation for installation building are conditions of its realization. Technological complexity resulting from a large dynamics of thermochemical gasification processes proceeding in unrecognized reactors of natural deposits requires precise identification measurements and optimal control of process systems with adaptation of activities to changing conditions. Underground coal gasification conducted for dozens of years in Russia and Uzbekistan, valuable and large-scale tests conducted in USA, results from experimental tests from Australia and Spain as well as planned projects in Great Britain, Republic of South Africa, India and China indicates a serious interest in this technology. This technology implementation may contribute to production of energy for local needs in areas of deposition of strata