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Assessment of primary rock mass stress by overcoring method using CCBO probes, Mine Rožná
Staš, Lubomír ; Waclawik, Petr ; Souček, Kamil ; Vavro, Martin ; Kukutsch, Radovan ; Nohejl, Zdeněk ; Rutar, Tomáš
The measurement of the stress state of the rock mass was performed on the 20th level of the liquidated uranium mine Rožná. This site was selected as one of the possible test sites of the planned geotechnical and geophysical methods. As part of the measurements, a series of four measurements of the 3D stress tensor were carried out within the sub-horizontal (approx. + 5 °) borehole with a diameter of 76 mm. To measure the primary stress of the rock mass, the overcoring method was used using a compact conical probe, developed at the Institute of Geonics AS CR, v.v.i. in collaboration with the Japanese University of Kumamoto under the original name Compact Conical ended Borehole Overcoring method (CCBO). The research report summarizes the results of the performed measurements.
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Geological and geotechnical characterisation of the mining environment - URF Bukov II - Interim report I
Bukovská, Z. ; Rukavičková, L. ; Chabr, T. ; Morávek, R. ; Levý, O. ; Sosna, K. ; Souček, Kamil ; Vavro, Martin ; Zelinková, T. ; Dobeš, P. ; Švagera, O. ; Kryl, J. ; Soejono, I. ; Řihošek, J. ; Hanák, J. ; Čermák, F. ; Kašpar, R. ; Mareček, L. ; Nedvěd, J. ; Vavro, Leona ; Myška, O. ; Janeček, Ivan
This report describes the work carried out in the first year of the public contract Geological and geotechnical characterisation of the rock environment – PVP Bukov II. The characterisation and descriptive works are directly related to the excavation of the premises for the future underground laboratory. These include in particular: geological and geotechnical documentation of the faces and walls of the workings, petrographic, mineralogical and structural geological documentation, hydrogeological characterisation of the environment, as well as determination of the physical and mechanical properties of the rock mass in situ and in the laboratory, geophysical characterisation and monitoring of the seismic effects of blasting. An important part of this report is the research of the classification systems used to describe the rock mass and hydrogeological research. The report includes also brief overview of the work planned for the second year of the project.
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Stress state rock mass monitoring ahead of longwall No. II/501/C, Mine Staszic-Wujek, PGG, Poland -Project RFCS DD-MET
Waclawik, Petr ; Kukutsch, Radovan ; Staš, Lubomír ; Souček, Kamil ; Vavro, Leona ; Vavro, Martin ; Kubina, Lukáš ; Schuchová, Kristýna
For designing precisely the reinforcement of mine gate and reinforcing underground structures in general, knowing stress and deformation states in the rock massive in the immediate vicinity of these mine works as precisely as possible is absolutely decisive. In order to verify the rock mass stress state and its changes induced by longwall mining, the monitoring of rock mass stress changing in connection with the mine out of the coal seam No. 501, longwall face No. II/501/C in the Mine Staszic-Wujek, Poland, was suggested. The aim of the contractual research was the realisation and interpretation of the rock stress state monitoring using the CCBO (Compact Conical ended Borehole Overcoring method) and CCBM (Compact Conical ended Borehole Monitoring method) probes in the forefield of mentioned longwall face within geotechnical station. To verify stress monitoring, the survey of the state of the longwall gate was carried out using a pulse 3D scanner. The purpose was to capture deformation changes ahead of the advancing longwall face, specifically, at five stages in the ± 20 m section on each side from the installed geotechnical station.
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Structural mapping of exploration geotechnical boreholes walls within 1st phase – Ore Zone
Waclawik, Petr ; Vavro, Martin ; Schuchová, Kristýna ; Kukutsch, Radovan ; Staš, Lubomír ; Souček, Kamil ; Georgiou, Lucie
Structural-geological analysis, i.e. fracturing assessment of the walls of geotechnical boreholes (CIS12, CIS14, CIS31 and CIS37) within the Ore Zone lithium exploratory area was carried out on the basis of optical (OPTV) and acoustic televiewer (HiRAT) records evaluation. HiRAT and OPTV probes are part of the Robertson Geologging logging equipment. The apparatus has an electric winch with a four-core logging cable, which transmits the data recorded by the probes via a data logger to a computer. The spatial data obtained from interpretation of the geotechnical boreholes records were structurally analysed. The submitted research report comprehensively summarises the findings obtained from the structural mapping of geotechnical boreholes. On the basis measured data the rock mass quality evaluation of boreholes walls were additionally done. The complex data have been allowed very precise analysis of rock mass structural conditions, which are necessary for construction geomechanical model.
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High-dimensional single cell cytometry approach for immune system analysis
Koladiya, Abhishek ; Němečková, Šárka (advisor) ; Cosma, Antonio (referee) ; Souček, Karel (referee)
Technological advancement allowed for the advent of single-cell technologies capable of measuring a large number of cellular features simultaneously. These technologies have been subsequently used to shed light on the heterogeneity of cellular systems previously considered homogeneous, identifying the exclusive features of individual cells within cellular niches. Today, single-cell technologies represent an essential tool for studying the underlying immunological mechanisms correlating with disease. In this context, cytometry is one of the diverse high-throughput methods capable of examining more than 50 features per cell. However, utilising cytometry at its full potential requires the development of optimized assays. Additionally, the resulting high-dimensional data represent a challenge for existing computational techniques. This thesis attempts to address these challenges. The first part of the thesis is focused on developing a non-linear embedding algorithm for rapid analysis of cytometry datasets called EmbedSOM. The comparison of EmbedSOM with other state-of-the-art algorithms suggested the superiority of EmbedSOM with faster runtime. This is critical for the analysis of large datasets with millions of cells. Furthermore, EmbedSOM has additional functionality such as landmark guided...
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X-ray computer tomographic analysis of four concrete specimens based on steel-making slag and artificial dense aggregates
Souček, Kamil ; Georgiou, Lucie
Visualization of the internal structure, evaluation of the structure and basic analysis of porosity on four concrete test specimens were carried out. The non-destructive method of industry 3D X-ray computed tomography was used for the analysis of the test specimens. Based on the CT slices of individual the specimens of concrete, the four basic components of concrete were identified (i) cement binder, ii) fraction formed by steel-making slag, iii) fraction formed by artificial dense aggregate, iv) the last component of concrete is represented by pores). The carried out CT porosity analysis determined the average porosity of the investigated concrete at the level of 6.5 ± 1.52%.
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X-Ray CT inspection of subsurface areas of concretes exposed to fast flowing liquids
Sitek, Libor ; Hlaváček, Petr ; Souček, Kamil ; Bodnárová, L. ; Foldyna, Josef ; Zajícová, Vendula ; Berčáková, Andrea ; Foldyna, Vladimír
Concrete structures affected for a long time by flowing liquids are exposed to gradual erosion in surface layers caused by a combination of several degradation processes: abrasion, cavitation and chemical or bacterial impacts. Due to the complex phenomena and difficult-to-define initial and boundary conditions, the whole process cannot be easily simulated using the conventional computing tools. Laboratory experimental research is thus the most appropriate approach for the investigation of a suitable composition of concrete resistant to the flowing liquids. However, the methods used are often very time consuming and last even several years. High-speed water flows can be elegantly used for the acceleration of the mechanical simulation of a real situation. Several experiments on the effects of the high-speed water flows on concrete surfaces have been carried out. Using the X-Ray CT methods, subsurface structures of concretes exposed to the accelerated mechanical simulation of the erosion wear caused by fast flowing liquids were investigated and presented in the article. It has been shown that the simulation does not cause initiation of new fractures or cracks in the original concrete structure. The pure water flow mainly removes the hardened cement paste and reveals the aggregate grains. The water flow with abrasive particles disintegrates in greater depths and washes out entire aggregate grains, eventually amputates them and finally smoothens entire surface.
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Data Acquisition from the Deep Horizons of the Rožná Mine - Final Report (Technical report SÚRAO č. 464/2020)
Bukovská, Z. ; Švagera, O. ; Chabr, T. ; Leichmann, J. ; Sosna, K. ; Souček, Kamil ; Vavro, Martin ; Zuna, M. ; Navrátil, P. ; Bohdálek, P. ; Bošková, M. ; Dobeš, P. ; Filipský, D. ; Franěk, J. ; Galeková, E. ; Georgiovská, Lucie ; Hanák, J. ; Havlová, V. ; Hlisnikovský, K. ; Holéczy, D. ; Jankovský, F. ; Jaroš, M. ; Jelínek, J. ; Knésl, I. ; Koucká, L. ; Kryl, J. ; Kříbek, B. ; Kubeš, M. ; Kubina, Lukáš ; Kučera, R. ; Kukutsch, Radovan ; Laufek, F. ; Mixa, P. ; Mozola, J. ; Násir, M. M. ; Palát, J. ; Patočka, M. ; Pořádek, P. ; Rosendorf, T. ; Soejono, I. ; Staš, Lubomír ; Vavro, Leona ; Veselovský, F. ; Vorel, J. ; Waclawik, Petr ; Wertich, V. ; Zajícová, Vendula ; Zelinková, T.
Final Report of the Project „Data Acquisition from the Deep Horizons of the Rožná Mine“ presents the results of the study of rock mass properties with respect to the presence of a significant tectonic zone. The study focused on the change of properties in the vicinity of the so-called first zone of the Rožná deposit, but also on the change of these properties with a depth of 12–24. floor of the former mine, 550-1200 m below the surface. Realized works included geological, petrographic, geochemical description of the rock environment, geophysical work (esp. seismics), study of physico-mechanical properties of rocks, transport experiments and deposit revalidation of the Rožná deposit. All work was carried out for the purpose of describing the studied zone and its manifestation with an emphasis on ensuring the safety of the potential location of the deep geological repository.
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Acquisition of deep data from horizonts of Rožná mine - Technical report for 2019
Bukovská, Z. ; Bohdálek, P. ; Buda, J. ; Dobeš, P. ; Filipský, D. ; Franěk, J. ; Havlová, V. ; Holéczy, D. ; Chabr, T. ; Jelínek, J. ; Jelínek, J. ; Knésl, I. ; Kryl, J. ; Kříbek, B. ; Laufek, F. ; Leichmann, J. ; Navrátil, P. ; Pořádek, P. ; Soejono, I. ; Sosna, K. ; Souček, Kamil ; Švagera, O. ; Vavro, Leona ; Vavro, Martin ; Veselovský, F. ; Waclawik, Petr ; Zuna, M.
This report summarizes work that has been done during the second phase of the third and fourth\nwork package of the tender Acquisition of deep data from horizons of Rožná mine. It contains\ndescription of analytical work performed in laboratory and in situ, documentation in the mine and\n3D modelling.
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