National Repository of Grey Literature 10 records found  Search took 0.01 seconds. 
Research of geotechnical methods – Stage research report – Stage C
Staš, Lubomír ; Waclawik, Petr ; Souček, Kamil ; Vavro, Martin ; Kukutsch, Radovan ; Schuchová, Kristýna ; Gong, Libin ; Kubina, Lukáš ; Zajícová, Vendula ; Nohejl, Zdeněk ; Rutar, Tomáš
The main goal of project No. FV20294 (GEOSTAB) was the verification of measured geophysical quantities with data obtained by various geotechnical methods. For this reason, stage C - Research of geotechnical methods was solved in parallel and in close cooperation with stage B - Research of geophysical methods. The geotechnical experiments in situ were carried out in the same localities where geophysical methods were applied. For this purpose, several underground mining workings located in different lithological and geomechanical conditions were selected. Experimental gallery Josef was selected in volcanic rocks, the metamorphic rock mass was represented by underground workings of the former deep uranium mine Rožná and the sedimentary environment was examined in the old slate mine Modrá štola. The stage research report summarizes the results of geotechnical, laboratory and numerical methods from all the mentioned localities.
Determination of rock mass stress by the method of hydrofracturing of borehole wall, Experimental gallery Josef
Staš, Lubomír ; Waclawik, Petr ; Kukutsch, Radovan ; Kubina, Lukáš ; Rutar, Tomáš
The method of hydrofracturing of borehole walls was chosen to measure the rock mass stress at the Experimental gallery Josef. This method allows direct measurement of stress in areas accessible only by the boreholes. Experimental work took place in the roadway No. SCHZ-JP9 in the down borehole No. JT1 with a diameter of 76 mm and a length of 73.1 m. The research report summarizes the results of stress measurements in the Experimental gallery Josef within the mentioned measurement campaign.
Determination of rock mass failure using acoustic and optical television - volcanic rocks, Experimental gallery Josef
Staš, Lubomír ; Waclawik, Petr ; Souček, Kamil ; Vavro, Martin ; Kubina, Lukáš ; Rutar, Tomáš
In order to evaluate the geological structures on the boreholes walls, using optical and acoustic logging methods (OBI and ABI) the boreholes were logged at the Experimental gallery Josef. Optical and acoustic recording was performed in the down borehole (JT1) using an optical (OPTV - Optical TeleViewer) and acoustic (HiRAT - High Resolution Acoustic Televiewer) televisions. Due to the inclination of the horizontal borehole (JTGeo01) -10°, oriented records by both methods (OBI and ABI) were made too. The measured oriented records by OBI and ABI methods were processed and evaluated in WellCAD software for logging data processing. Based on the evaluated structural data, a structural cross-section was constructed, which was the background material for correlation with geophysical data.
Determination of rock mass failure using acoustic and optical television - metamorphic rocks, Rožná Mine
Staš, Lubomír ; Waclawik, Petr ; Souček, Kamil ; Vavro, Martin ; Kukutsch, Radovan ; Rutar, Tomáš ; Nohejl, Zdeněk
In order to evaluate the geological structures on the core boreholes walls, using optical and acoustic logging methods (OBI and ABI) the boreholes were logged at the Rožná Mine. Oriented recording of the walls was performed using optical television (OPTV - Optical TeleViewer) in the horizontal borehole (VRT-H). The optical recording was supplemented by the acoustic television record (HiRAT - High Resolution Acoustic Televiewer) in the down borehole (VRT-U). The measured oriented records by OBI and ABI methods were processed and evaluated in WellCAD software for logging data processing. Based on the evaluated structural data, a structural cross-section was constructed, which was the background material for correlation with geophysical data.
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.
Measurements of stress changes in the rock mass around the exploratory gallery site Skalka using tenzometric bolts in 2017
Staš, Lubomír ; Zajícová, Vendula ; Nohejl, Zdeněk ; Rutar, Tomáš
The subject of the report is to continue the monitoring and measurement of stress changes in the rock mass following previous measurements from 1997-2016 in the vicinity of the reconnaissance galley using tenzometric bolts mounted in the ceiling and hips of the reconnaissance and access galleries. Measurements took place during 2017.
Měření změn napětí v horninovém masivu v okolí průzkumné štoly staveniště Skalka pomocí tenzometrických svorníků v roce 2015
Staš, Lubomír ; Zajícová, Vendula ; Georgiovská, Lucie ; Nohejl, Zdeněk ; Rutar, Tomáš
Předmětem zprávy je pokračování sledování a měření změn napětí v horninovém masivu v návaznosti na předchozí měření z let 1997-2014 v okolí průzkumné štoly pomocí tenzometrických svorníků, zabudovaných do stropu a boků průzkumné a přístupové štoly. Měření probíhalo v průběhu roku 2015.
Measurements of stress changes in the rock mass around the exploratory gallery site Skalka using strain gauge studs in 2014
Souček, Kamil ; Nohejl, Zdeněk ; Georgiovská, Lucie ; Zajícová, Vendula ; Rutar, Tomáš ; Šimkovičová, Jarmila
Předmětem zprávy je pokračování sledování a měření změn napětí v horninovém masivu v návaznosti na předchozí měření z let 1997-2013 v okolí průzkumné štoly pomocí tenzometrických svorníků, zabudovaných do stropu a boků průzkumné a přístupové štoly. Měření probíhalo v průběhu roku 2014.
Collection and analysis of data from four voltage probes, SP-47 in the gallery Josef at Mokrsko within the the project MPO FR-TI3/325
Staš, Lubomír ; Souček, Kamil ; Nohejl, Zdeněk ; Kaláb, Tomáš ; Rutar, Tomáš
Text, including tables, graphs and images is a comprehensive annual report to the Treaty on the work of 823/24/10 data collection and evaluation of 4 pieces voltage probes, SP-47 in the gallery Josef at Mokrsko. It contains the results of the evaluation of the measurements of voltage changes in test wells in the immediate vicinity of the borehole stress - thermal sources in solid exploration adit SP-47 in Josef. All measurements were obtained using a strain gauge measuring the conical heads, specially manufactured and installed here for this purpose. Measurements are carried out within the project MPO-TIP FR-TI 3/325 - The importance of the thermal load of rocks - perspectives underground storage of thermal energy.
Měření změn napětí v horninovém masivu v okolí průzkumné školy staveniště Skalka pomocí tenzometrických svorníků v roce 2012
Staš, Lubomír ; Souček, Kamil ; Nohejl, Zdeněk ; Georgiovská, Lucie ; Stašová, Vendula ; Rutar, Tomáš ; Šimkovičová, Jarmila
Předmětem zprávy je pokračování sledování a měření změn napětí v horninovém masivu v návaznosti na předchozí měření z let 1997-2011 v okolí průzkumné štoly pomocí tenzometrických svorníků, zabudovaných do stropu a boků průzkumné a přístupové štoly. Měření probíhalo v průběhu roku 2012.
Fulltext: content.csg - Download fulltextPDF
Plný tet: UGN_0385295 - Download fulltextPDF

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