Browsing by Subject "opencast mines"

Now showing 1 - 5 of 5

Access status: Open Access ,
Czynniki wpływające na ekonomiczne warunki prowadzenia eksploatacji i racjonalne wykorzystanie zasobów złoża kruszywa naturalnego
(Wydawnictwa AGH, 2010) Król-Korczak, Jadwiga; Jeziorowski, Wojciech Zbigniew
The article presents the key factors that impact on the economic conditions under which exploitation of natural aggregate deposits. Mines extracting natural aggregate deposits account for nearly half the total number of mines, which is the reason why the reasonable small-scale deposits management plays an important role in Polish mining industry. The article drew attention to the specificities of deposits and the resulting conditions for rational management of natural aggregate deposits, which begins at the stage of exploration and continues throughout the life of the mine, up to and including its liquidation.
Access status: Open Access ,
Obciążenia ekstremalne w procesie projektowania i eksploatacji koparek kołowych przeznaczonych do pracy w gruntach trudno urabialnych kopalń odkrywkowych węgla brunatnego
(Wydawnictwa AGH, 2009) Alenowicz, Jerzy; Onichimiuk, Marek; Wygoda, Marian
Problems connected with extreme loadings modelling in the process of design and exploitation of bucket wheel excavators intended for operation in the hard diggable soils, have been presented in the article. Existing deterministic model of bucket wheel loadings has been described. New statistical approach to digging forces modelling of hard diggable soils with bucket wheel excavators has been presented on the basis of actual research on parameters of this process. Extreme values of statistical asymptotic distributions of steel structure stress and unit digging resistances are the basis for modelling. The model of component tangent digging force operating directly on the edge bucket of bucket wheel excavators was proposed. The further procedure connected with verification of proposed statistical model was discussed. The advantages resulting from use of the above model in design and exploitation of opencast mining bucket wheel excavators were given.
Access status: Open Access ,
Rekultywacja i rewitalizacja kopalń węgla brunatnego na przykładzie Kopalni »Bełchatów«
(Wydawnictwa AGH, 2009) Kasztelewicz, Zbigniew; Kaczorowski, Jacek
The examples of lignite mine revitalization which were conducted in Poland and abroad were presented in the article. The attention was paid to the difficulties of lignite mine reclamation and possibility of their attractive regeneration. Mine closure and its reclamation are presently the Bełchatów Lignite Mine challenges. Nevertheless, this process will take a few dozen years, the vision of final revitalization should already be created. It ensures proper process of closing down and reclamation of the post-mining region course. Concept for Bełchatów Lignite Mine closure and revitalization, which was worked out by AGH University of Science and Technology staff, was presented in this article.
Access status: Open Access ,
Simulation model for lignite handling at the Boxberg stockyard
(Wydawnictwa AGH, 2009) Kahnt, René; Sontag, Volker; Bauch, Thomas
The new-built unit R of the Boxberg power plant and the re-commissioning of the Reichwalde opencast mine in 2010 require the extension of the coal stockyard at Boxberg (KLP Bx), to meet the considerably higher coal handling requirements. Therefore, the plant-technical concept of the KLP Bx was extended. Aim was to proof the viability of the selected plant concept for a safe operational management, i.e. coverage of the coal handling via the coal stockyard within one reference week under consideration of the various technical and technological conditions under the given marginal conditions. A conventional verification was not possible due to the high variability of the whole system. In cooperation with GMB Senftenberg and G.E.O.S. Freiberg, a coal handling model was developed taking into consideration prioritized criteria for meeting the objective and marginal conditions. Based on the simulation tool GoldSim/RM further considerations of variants are enabled. An outlook for further fields of application was presented and the limitations were explained.
Access status: Open Access ,
The mining of igneous rocks – mining technology exemplified by the «ZALAS» Porphyry Mine
(Wydawnictwa AGH, 2022) Kurek, Jan; Wydro, Tomasz
The geological structure and rock resources of the region of Krakow are very diverse. This results from its location at the junction of three structural units as well as from the variety of geological processes that have taken place during their geological history. Devonian to Quaternary formations are visible on the surface, while the rocks found in boreholes are even older. Igneous rocks in the region of Małopolska (Lesser Poland) are concentrated in a rela- tively small area. The following rocks have been mined in the past: red porphyry in Miękinia, melaphyre in Regulice, porphyry in Orla. Currently active mines – quarries, which are engaged in continuous exploitation, include the «Zalas» Porphyry Mine in Zalas and the «Niedźwiedzia Góra» Diabase Mine in Tenczynek.