Ferenc Deák

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• PhD
• Assistant Professor at Obuda University

An advantage of acoustic emission (AE) monitoring is that it can be used to capture pre-peak, peak, and post-peak stress changes in the rock mass. It provides useful information for characterizing rock mass behaviour at all stages of fracturing, even prior to measurable deformation. Based on the fact that AE activity is closely related to stress ch...

This paper on the geotechnical data integration and the results of the numerical simulations – numerical modelling of the tunnel excavation with the primary lining is based on finite element numerical simulation approach which predict stability of the future excavated tunnels in the pro-ject of LOT2 Lugoj-Deva motorway tunnels. The aim of this proj...

This paper introduces the monitoring system used on the excavation of the M85 Tunnels. The ~780 twin tubes were excavated in demanding, mixed geological conditions using sequential ex-cavation methods (SEM). Temporary support was mainly reinforced shotcrete used together with pipe umbrella, spiling, forepoling board. As there was no room for error...

For professional tunnelling engineers, particularly in the early stages of a project, this study will be useful as it provides a critical assessment of what works best in the RMR rock mass classification system and how the values derived from it can be translated into the establishment of a practical rock safety system 45 years after its developmen...

Tunnelling is an obviously three-dimensional process. Tunnelling in yielding ground also generates a 3D, bullet shaped zone of plasticity in soft rock, but also generates a bullet shaped fracture zones in the brittle rock masses. Longitudinal displacement profiles (LDP) characterize and describe the displacement history during tunnel excavation, in...

In this study, a new method was examined that used acoustic emission (AE) monitoring data, in combination with a primary Boundary Element stress analysis, to back-calculate rock mass strength. The presented AE data came from the National Radioactive Waste Repository (NRWR) for low-and intermediate-level waste (LLW/ILW). AE monitoring is able to det...

In order to understand how the in-situ primary stress state has evolved with subsidence and uplift in a granitic rock mass for anticipated of a radioactive waste repository in Hungary, the authors investigated the applicability of seismic tomography as an interpretive tool. Very high P wave velocity (V p) values were obtained during the tomographic...

After the economic boom in Iraq-Kurdistan the infrastructural reorganization began, based on the design of the highway and road network. The construction of the high number of tunnels is required because of the relief of the region thus the tracing of the roads can be better. Our Hungarian team was responsible for the verification of the Iranian-de...

Performance In this online seminar that was hosted on February 16th, 2021, Mr. Bujor Octavian (GeoSearch) and Mr. Deak Ferenc (BME - Budapest University of Technology and Economics) presented details of their experience with Rocscience products by presenting a case study to understand the risks and seismic performance while evaluating the stability...

The program for the final disposal of low and intermediate level radioactive waste has been established by the Paks Nuclear Power Plant, Hungary. The Central Nuclear Financial Fund and the Public Limited Company for Radioactive Waste Management (PURAM) has been established to coordinate organizations and activities for all tasks in connection with...

The program for the final disposal of low and intermediate level radioactive waste was established by Paks Nuclear Power Plant, Hungary. Preparation of final disposal has been done as part of a national program since 1993. The Central Nuclear Financial Fund and the Public Limited Company for Radioactive Waste Management (PURAM) have been establishe...

The program for the final disposal of low and intermediate level radioactive waste was established by Paks Nuclear Power Plant, Hungary. Preparation of final disposal has been done as part of a national program since 1993. The Central Nuclear Financial Fund and the Public Limited Company for Radioactive Waste Management (PURAM) have been establishe...

BEVEZETÉS Magyarországon a kis és közepes aktivitású radioaktív hulladékok tárolása a Bátaapáti mellett kiépített Nemzeti Radioaktívhulladék-tároló (NRHT) történik. A tároló elhelyezését megelőzően számtalan felszíni (köztük geofizikai) és fúrásos kutatás készült az NRHT optimális helyének meghatározására. A kivitelezés során azonban kiderült, hogy...

The program for the final disposal of low and intermediate level radioactive waste was established by Paks Nuclear Power Plant, Hungary. Preparation of final disposal has been done as part of a national program since 1993. The Central Nuclear Financial Fund and the Public Limited Company for Radioactive Waste Management (Puram) have been establishe...

The primary aim of this paper is to review a recently proposed shear behaviour model of infilled rock joints in which joint surface characteristics and the properties of the joint and infill materials has been taken into account. The empirical model has also finally validated based on a few experimental data from the literature. The results of that...

The program for the final disposal of low and intermediate level radioactive waste was established by Paks Nuclear Power Plant, Hungary. The Central Nuclear Financial Found and the Public Limited Company for Radioactive Waste Management (PURAM) has been established to coordinate organizations and activities for all tasks in connection with nuclear...

The PURAM (Public Limited Company for Radioactive Waste Management) is the owner and operator of the National Radioactive Waste Repository in Hungary. The facility ensuring the final deposition of the low and intermediate levele radioactive wastes and it is situated beside the Báta- apáti village, excavated in a granitic host rock. During the excav...

ABSTRACT: The program for the final disposal of low and intermediate level radioactive waste wasestablished by Paks Nuclear Power Plant, Hungary. The Central Nuclear Financial Found and the PublicLimited Company for Radioactive Waste Management (PURAM) has been established to coordinateorganizations and activities for all tasks in connection with n...

Detailed geological, geophysical, rock- and soil mechanical surveys will be carried out before starting the construction of the planned new units at Paks Nuclear Power Plant. The estimation of earthquake hazard at the Power Plant site requires very accurate geological-structural knowledge of the surrounding area. As the first step of the exploratio...

A Paksi Atomerőmű további blokkokkal történő bővítésének előkészítését egy igen intenzív, mindenre kiterjedő geológiai, geofizikai, kőzet-és talajmechanikai kutatási program végrehajtása előzi meg, mely megfelel a Nemzetközi Atomenergia Ügynökség és a Nukleáris Biztonsági Szabályzat előírásai-nak (Nagy et al. 2013). Az erőmű földrengés veszélyeztet...

Wildhorse UCG Ltd. started an investigation project preparing the construction of an underground coal gasification (UCG) plant in the East Mecsek, at Mecseknádasd (Váralja) region. The project was at the Bankable Feasibility Study phase. Since the planned UCG panels were partly locat-ed in an inhabited area, one of the key issues related to the fea...

The responsible organization for the program of the low and intermediate level radioac-tive waste repository project in Hungary is the Public Limited Company for Radioactive Waste Man-agement (PURAM). The selected potential host rock for the Bátaapáti National Radioactive Waste Repository is a granite complex in the Mórágy Granite Formation in the...

The geologic, geotechnical and rock mechanical background of the area, which includes an underground cavern system, is very complex. Initially, to describe the rock mass properties, the RMR and Q systems were used, while the rock support system was based solely on the Q system. Later, during construction of the repository chambers, the GSI system w...

The enlargement of Paks NPP requires from earth scientists fulfillment of complex investigations. As the international regulation and practice orders, the task is gradual, steady and the necessary knowledge of the geological environment. The coordinated works of experts of geology, geophysics, geotechnics, hydrogeology and seismology could create f...

After the economic boom in Iraq-Kurdistan the infrastructural reorganization began based on the design of the highway and road network. The construction of the high number of tunnels is required because of the relief of the region thus the tracing of the roads can be better. Our Hungarian team was responsible for the verification of the Iranian-des...

Jelen cikk a Bátaapáti Nemzeti Radioaktívhulladék-tárolót befogadó kőzettest monzogránit és monzonit laboratóriumi kőzetmintáin kétirányú nyúlásmérő bélyeges deformációméréssel elvégzett egytengelyű nyomószilárdság mérések új szempontú mérési módszerét és értelmezését mutatja be. A mérések során a rideg tönkremenetel jellegzetes károsodási szakasza...

The program for the final disposal of lowand intermediate level radioactive waste was established by Paks Nuclear Power Plant, Hungary. Preparation for final disposal of radioactive wastes has been done as part of a national program since 1993. The Central Nuclear Financial Fund and the Public Limited Company for Radioactive Waste Management (Puram...

The paper provides new results on the fracture surface roughness testing from the Bátaapáti National Radioactive Waste Repository project. During the calibration of modeling and design work it was necessary to develop a simple and quantitative approach to predict the Joint Roughness Coefficient (JRC) value of fracture surfaces. To reach this goal l...

NRWR at Bátaapáti is designed as the final disposal of LLW and ILW originated from Paks NPP. The development of a systematic deformation monitoring network for controlling the stability of underground openings of NRWR started in 2006. The data sets gained by that system (mainly by radial multipoint borehole extensometers and special triangular meas...

Az EDZ kifejezést először Svédországban, a Stripa Mine nukleáris hulladéktároló telephely kutatásai során használták a vágathajtás hatásaként a vágat környezetében megváltozott fizikai és kémiai adott-ságú térrész leírására (Andrássy et al. 2012). Egészen a közelmúltig ezt a megváltozott állapotú tér-részt két részre osztották (Tsang et al. 2005):-...

A kutatás során a Mórágyi Gránit Formáció gránitos származó mintadarabokat elemeztünk. Az ilyen jellegű kőzetek nyírószilárdsági vizsgálatát már korábban is ismertették (Buocz et al. 2010), a jelen cikk a felületi érdesség szerepével foglalkozik. A vizsgált minták monzogránitos kőzetekből származnak és ezen belül olyanokat is elemeztünk, me-lyek tö...

During the construction of low and intermediate level radioactive waste repository in Bátaapáti, various geotechnical data were collected. The tunnel faces were documented continuously using different rock mass classification systems for determining the excavation support system. The aim of this paper is to compare the three broadly used rock engin...

It was more than hundred years ago, when Theodore von Kármán (born as Tódor Kármán) designed and developed the first triaxial cell for investigation of brittle rocks behavior. His first research was based on Carrara marble and Mutenberg sandstone with varying confining pressures up to 600 MPa, demonstrating changes from brittle stages to ductile be...

Napjainkban a kőzetkörnyezetben való mélyépítési tervezésénél (ún. alagutak, bányák, felszín alatti tárolók, stb.), mindinkább törekednek a kvantitatív módon történő tervezésre. A bemenı kőzetfizikai paramétereket sok esetben ma már jól tesztelt empirikus módszerekkel határozzák meg, ahol a kőzettest értékét valamelyik elterjedt kőzettest-osztályoz...

A modellezés helyszínéül szolgáló tárolókamrák a Nemzeti Radioaktívhulladék-tároló felszín alatti vágatrendszerének részét alkotják, melyet a Radioaktív Hulladékokat Kezelı Kft. (RHK) megbízásá-ból a Mecsekérc Környezetvédelmi Zrt. fıvállalkozásával építettek meg. Ez Bátaapátiban a Mórágyi gránitos területen található. A lejtaknákkal együtt mintegy...

During the construction of Bátaapáti access tunnels for low- and intermediate level radioactive waste repository much geotechnical information was collected. During the excavation, the tunnel faces were documented continuously using different rock mass classification systems for determining the support system. The goal of this paper is to compare t...

Kulcsszavak: előinjektálás, Bátaapáti, mikrocement, kolloidális szilika gél 1 BEVEZETÉS A több, mint egy évtizedes felszíni kutatási tevékenységek folytatásaként az atomerőműi kis és köze-pes radioaktív hulladékok végleges elhelyezésére szolgáló felszín alatti tároló építési munkái 2005. februárjában kezdődtek el Bátaapáti külterületén. 2008. május...

A Bátaapáti (Üveghuta) telephely a Mecsek-hegység keleti részén helyezkedik el, földrajzi szempont-ból a Geresdi dombsághoz, földtani szempontból a Mórágyi röghöz (ÉK-i része) tartozik, itt találhatók a Mórágyi Gránit Formáció paleozoós gránitkőzetei. (1. ábra). Földtani szempontból a felszíni fúrásokkal megkutatott perspektívikus terület uralkodóa...

A Paksi Atomerõmû kis- és közepes aktivitású radioaktív hulla- dékainak végleges elhelyezésére irányuló kutatási program közel 14 éve kezdõdött. Bátaapátiban az 1997-1999 közötti idõszakban történt intenzív, külszínrõl indított földtani kutatás, melynek során számos geofizikai és geotechnikai vizsgálatra is sor került. Ezek eredménye- képp születet...

A Bátaapáti (Üveghutai) telephely a Mecsek-hegység keleti részén helyezkedik el, földrajzi szempontból a Geresdi dombsághoz, földtani szempontból a Mórágyi röghöz (ÉK-i része) tarto-zik, itt találhatók a Mórágyi Gránit Formáció paleozoós gránitkőzetei. E formáció gránitjába tervezték meg a falu határában mélyülő kis és közepes aktivitású radioaktív...

sszefoglalás: A kis és közepes aktivitású radioaktív hulladékok végleges elhelyezésére irányuló kutatási program több mint 13 éve kezdődött Magyarországon. A kutatás egy az egész országra kiterjedő vizsgálattal kezdődött, melynek célja egy potenciálisan alkalmasnak tekintett formáció helyének meghatározása volt. Végül a Mórágyi Gránit Formáción bel...

NASA Lunar Set basalts' a) paragenetic sequences, b) textural characteristics (model by cellular automata), c) cooling rates were studied, TTT diagram of basalts was constructed, technologies (industrial TTT diagrams) were compared.

We studied NASA Lunar Educational Thin Section Set's basalts and basaltic clast from breccias and soil samples. 1) We arranged them according to their silicate paragenetic sequences, textural characteristics, and estimated cooling rates, 2) we reconstructed a tentative TTT-diagram for a lunar basaltic lava flow, 3) we compared these textures to tho...