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Bukov PVP underground research laboratory - geotechnical conditions of construction
Souček, Kamil ; Vavro, Martin ; Staš, Lubomír ; Koníček, Petr ; Ptáček, Jiří ; Waclawik, Petr ; Vavro, Leona ; Lednická, Markéta ; Kaláb, Zdeněk ; Šňupárek, Richard ; Vondrovic, L.
Bukov PVP Underground Research Laboratory (Bukov URL) is designed to be a test site for the evaluation of properties and behavior of the rock mass which is of similar type as selected candidate sites in the Czech Republic. It is situated at a depth corresponding to the proposed storage depth of the final locality for the national deep repository of high-level radioactive waste. The Bukov URL, the construction of which has begun in 2013, is situated in the southern part of the Rožná uranium deposit, at the northeastern periphery of the Strážek Moldanubicum close to its contact with the Svratka Unit. The rock mass is composed of relatively monotonous rock sequences primarily of a volcanosedimentary origin. They are currently represented, due to the subsequent tectonometa-morphic development, by migmatized biotite paragneisses up to stromatitic and/or oftalmitic migmatites, amphibole-biotite to biotite-amphibole gneisses, and amphibolites. The workings of the Bukov URL are situated on the level 12 of the Bukov-1 shaft, at the depth of about 600 m below the earth’s surface. The Bukov URL is still under construction and the research works by the consortium of several organizations – ÚJV Řež, a.s., Czech Geological Survey, Institute of Geonics of the CAS, v.v.i., and Arcadis CZ, a.s. - are carried out simultaneously. The research activities focus on a complex geological and geotechnical characterization of the rock mass of interest, which is vital for the realization of further research in situ. This paper briefly describes the technical solution of the Bukov URL and the process of its construction.
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Stress state rock mass monitoring ahead of longwall No. 371 202 at 2ndA block, Mine Plant 2, OKD, a.s
Waclawik, Petr ; Ptáček, Jiří ; Koníček, Petr ; Vavro, Martin ; Staš, Lubomír ; Souček, Kamil ; Kukutsch, Radovan ; Kajzar, Vlastimil
Generally, the accurate knowledge of the stress strain state of the rock mass in the neighbourhood of the mining galleries and underground openings is absolutely critical for their precise support designing, not only in the vicinity of them, but also at a greater distance from them if the phenomenon affecting the rock mass stress fields occurs. Measurement (investigation) of the rock stress is usually carried out by interpretation of the rock mass deformation processes, which can be relatively precisely observed and measured. The roadways are loaded not only by rock pressures in the front of the coalfaces but also by destress blasting realised in the overburden rock seam in the scope of the rockburst prevention. In addition, the rock stress distribution is influenced by old mining activities too, for example by abandoned coal pillars in the seams in overburden, respectively by goaf in the excavated seam. All of these factors can significantly affect the stress-strain behaviour of the rock mass around the mining works.
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Stress state rock mass monitoring ahead of longwall No. 371 202 at 2ndA block, Mine Plant 2, OKD, a.s
Waclawik, Petr ; Ptáček, Jiří ; Koníček, Petr ; Vavro, Martin ; Staš, Lubomír ; Souček, Kamil ; Kukutsch, Radovan ; Kajzar, Vlastimil
Generally, the accurate knowledge of the stress strain state of the rock mass in the neighbourhood of the mining galleries and underground openings is absolutely critical for their precise support designing, not only in the vicinity of them, but also at a greater distance from them if the phenomenon affecting the rock mass stress fields occurs. Measurement (investigation) of the rock stress is usually carried out by interpretation of the rock mass deformation processes, which can be relatively precisely observed and measured. The roadways are loaded not only by rock pressures in the front of the coalfaces but also by destress blasting realised in the overburden rock seam in the scope of the rockburst prevention. In addition, the rock stress distribution is influenced by old mining activities too, for example by abandoned coal pillars in the seams in overburden, respectively by goaf in the excavated seam. All of these factors can significantly affect the stress-strain behaviour of the rock mass around the mining works.
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Deformations and leveling in the cadastral municipality Dětmarovice 2015
Kajzar, Vlastimil ; Waclawik, Petr ; Staš, Lubomír
The contract, the height measurement stations and deformations of points and lines in the measurement stations KÚ Dětmarovice and profiles surveyed contractor, beginning in 2003. These are the following - measuring deformations of three profiles (P1, P2, P3 + P4), height measurement of the three profiles (P1 , P2, P3 + P4), evaluation of the measured data, including technical reports.
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Reinterpretation of Carboniferous strata in the borehole no Stonava SV 2. The Czech part of the Upper Silesian basin
Horak, J. ; Martinec, Petr ; Waclawik, Petr ; Málek, O.
Borehole no Stonava SV 2 was realized in 1968 - 70 yrs. for the verification of the stratigraphy of Carboniferous strata in Karviná area. This borehole was very important for regional study. The original interpretation of the stratigraphy of the Ostrava and Karviná Fms in this borehole was inaccurate, that is, without the revision, used the current publications. The borehole SV 2 was situated between the Stonava and Albrechtice tectonic fault, in block in a Karviná graben. Strong tectonic disturbances in this tectonic structure lead without revision of correlation horizons incorrect determination of litostratigraphy and the thickness of individual members of Ostrava and Karviná Fms in Carboniferous strata. Because the boundaries of individual members of the Ostrava Fm are given into the ceilings of the marine horizon, it is a mistake to disregard the new findings from the study of their association of fauna in marine horizons and geological structure in a new mine boreholes, realized later in the neighbouring of the borehole SV 2. In the case of good primary geological documentation of borehole Stonava SV 2, however, it is possible at any time proceed to reinterpretation.
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Dílčí zpráva II/2015 Hodnocení monitoringu napěťodeformačního stavu horninového masivu při dobývání sloje 30(634) v rámci zkušebního provozu dobývací metody chodba-pilíř v OPJ Dolu ČSM - Sever
Waclawik, Petr ; Ptáček, Jiří ; Kukutsch, Radovan ; Kajzar, Vlastimil ; Koníček, Petr ; Souček, Kamil ; Staš, Lubomír
Monitoring napěťodeformačního stavu horninového masivu je nezbytným předpokladem pro ověření nové neschválené dobývací metody chodba-pilíř a jejího dalšího použití v podmínkách české části hornoslezské uhelné pánve. Tato dobývací metoda je projektována pouze na základě zkušeností a postupů, které jsou ověřeny v odlišných přírodních podmínkách a hloubkách pod povrchem a proto je nezbytná její verifikace pro podmínky české části hornoslezské pánve na základě geotechnického monitoringu. Předkládaná zpráva je zpracována na základě smlouvy o dílo č. 942/50/10, kde se Ústav Geoniky AV ČR, v.v.i. zavazuje provádět pravidelné vyhodnocování dat monitoringu napěťodeformačního stavu horninového masivu. V souladu s výše uvedenou smlouvou, je zpráva zpracována v 6-ti měsíčním intervalu a navazuje tak na dílčí zprávu I/2015 (Waclawik et al. 2015) předanou odběrateli v dubnu tohoto roku. Průběžné výsledky geotechnického monitoringu, tak jak zkušenosti získané v době dobývání první dobývky V, ukazují na specifika přírodních podmínek v lokalitě zkušebního provozu nové neschválené dobývací metody chodba-pilíř.
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The introductory view on the pressure load in the underground storage in the exploration zone Milasín-Bukov
Koníček, Petr ; Ptáček, Jiří ; Souček, Kamil ; Staš, Lubomír ; Vavro, Martin ; Waclawik, Petr
The report was prepared as the preliminary opinion on the pressure load resistance of the rock mass inside the gas storage Milasín-Bukov. It comprised the data summary and analysis, which were gained by measuring in mine or by laboratory tests. Rock and rock-mass parameters were obtained by deformation and/or stress/strain monitoring in the roadways in the mine using the index RMR or Q characterized the rock quality. The mechanical and stress/strain conditions were tested in labor on selected rock samples. The rock mass resistance to gas pressure inside the gas storage was determined based on the methodology stress strain in-situ measurements in the before driven roadways in the similar rock-mass conditions. The results were compared with the results of mathematical model.
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