Grant Agency of the Slovak Republic

01/2003-12/2005

The Branisko rock mass was classified by the systems RMR, Q and RMi, which complemented the geological information on exploratory gallery Branisko. The full-profile tunnelling data were analyzed by statistical methods providing new information on behaviour of variables scanned during the excavation, i.e. variables describing the TBM and rock mass. Based on detailed analysis of tectonic structures with various spatial orientation to the excavation line, it is possible to see their effect of energy consumption at excavation. The rock strength in the sections of high faults density exhibits lower values which also affect the energy consumption of disintegration process. An evaluation system was developed using both datasets acquired from the WORS monitoring system and the IKONA method results. Using the fuzzy logics, the system enables to approximate the uncertainty and non-linearity of the TBM excavation based on our defined rules. The final output is a variable characterizing the rock mass strength. The frequency analysis provided us for analysing the rock disintegration process in-situ at simultaneous action of disc cutters on TBM cutterhead. The data on disc cutter exchanges in the excavation progress were evaluated and formed a base for indirect determination of TBM cutterhead wear as a whole. The acquired data were processes using our designed program Frequency estimator at various stages of disc cutters wear. (5 publications in NCC journals, 5 publications in conference proceedings).

Grant Agency of the Slovak Republic

01/2003-12/2005

The co-authorship in the foreign monograph POPILKY (VSB TU Ostrava, ISBN 80-248-0327-5), there were presented results of biohydrometallurgical treating of energy fly ash.

Grant Agency of the Slovak Republic

01/2003-12/2005

The acoustic signal has been studied for identification of rock disintegration technology by diamond drilling tools. The study aims to a possibility for regime parameters differentiation at rock disintegration technology. (3 publications in proceedings

06/2003-12/2005

Stage 2, 3 and 10:
Calcite CaCO₃, mechanochemically activated in a laboratory as well as in an industrial mill was showed as a suitable sorbent for the zinc removal from wastewater. The materials prepared by the mechanochemical reduction as well as mechanochemical synthesis were characterized by the surface analysis methods (specific surface are measurements, SEM, TEM) and by the bulk analysis methods (XRD, VSM, Mössbauer spectroscopy). The obtained results were published in the scientific journals, presented in the international conferences. For the achievement of results the developed cooperation with workplaces in the USA, Germany and South Korea by application of sophistic method for determination of nanoparticle sizes was used.

Stage 7:
The modification of natural zeolite surface by nanoparticles of maghemite resulted in the improvement of its magnetite properties, which enable its application as an adsorbent and moreover its removal from water by magnetic separation. The sorption capacity for metal cations after modification was preserved (e.g. for Pb 98.17 mg/g) and contemporarily, the possibility of anions adsorption from solution was proven (e.g. for As 21 mg/g). These facts point to the enhancement of zeolite universality for its practical application as an adsorbent.

Stage 9:
The study of sulphate-reducing-bacteria (SRB) metabolism, namely the genera of Desulfovibrio and Desulfotomacullum, led to finding about possibility of their application in the remediation of strongly mineralised acid mining drainages (AMD), which results in SO₄^2-and utitilised SRB reduction, accompanying sulphane formation. The sulphane subsequently reacts with heavy metals cations (Fe, Cu, Zn,...) occurring in AMD and in such way creates their submicroscopic precipitates in the form of easily removable sulphides, which can be used as materials in sorption processes.

Stage 10-11:
The studies on biological and chemical leaching of iron from metallurgical waste coming from aluminium production in Ziar nad Hronom and also of mining waste from mineral processing plant in Roznava under metabolites application of microscope sponges and bacteria, namely Acidithiobacillus ferrooxidans brought knowledge about biological and chemical transformation of original compounds of waste as a result of total decomposition of primary sulphidic and carbonate structures and following precipitation of new industrially usable submicroscopic, above all oxygenous compounds of Fe. New original (able to patent) technologies of mineral processing and complex utilisation of examined wastes were proposed. The results of obtained submicroscopic iron dispersions (pigments) tests confirmed the possibility of their industrial application in plastic material production and building.

In the frame of project solution in the Institute of Geotechnics of the SAS the following items were totally published: 1 monograph, 4 paper in CC journal, 4 paper in NCC journals, 10 contributions in international conference proceedings, 14 contribution in domestic conference proceedings, 3 contribution in abstract proceeding.

CE SAV Nanosmart

01/2002-12/2005

Sulphidic particles on the CuS base were synthesized and characterized by unconventional mechanochemical reaction from organic and inorganic precursors in a laboratory as well as in an industrial mill. The mechanochemical reduction of antimony sulphide with elemental iron studied in a laboratory mill was also verified in an industrial mill. The products of synthesis were characterized by XRD, VSM TEM, DSC methods and Mössbauer spectroscopy (2 publications in CC journals, 2 publications in NCC journals).