Geophysical investigation in water rich mining area

master's thesis

• Title: Geophysical investigation in water rich mining area : master's thesis
• Title (croatian): Geofizička istraživanja u rudarskom području bogatom vodom : diplomski rad
• Author: Jelena Skenderija
• Mentor: Jasna Orešković (mentor)
• Committee member: Jasna Orešković (predsjednik povjerenstva)
• Committee member: Franjo Šumanovac (član povjerenstva)
• Committee member: Snježana Mihalić Arbanas (član povjerenstva)
• Granter: University of Zagreb; Faculty of Mining, Geology and Petroleum Engineering; (Department of Geophysical Exploration and Mine Surveying); Zagreb
• Defense date and country: 2018-01-19, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Mining, Petroleum and Geology Engineering; Geological Engineering

Abstract

Geophysical research was performed in the opencast mine, the Hinterburg quarry of the Diabaswerk Saalfelden GmbH in Austria, because it already has a long history of slope problems as a result of complex structural geological conditions and difficult water conditions. According to previous research in this area, there are Paleozoic metamorphic and sediment rocks, basaltic eruptive and overlaid Quaternary alluvium moraine material. Using electrical-resistivity tomography method and seismic-refraction method, the lithological and structural relationships in the subsurface were determined as well as presence of water and its influence. Four electrical profiles (p1, p2, p3, p4) and two seismic profiles (P1 and P4) were measured. Electrical measurements were performed by multi-electrode geoelectrics using GeoTest software and resistivity models were obtained by DC2DInvRes and Res2dinv software. Seismic refraction measurements were performed using Summit X One technology and seismic velocity models were obtained by Rayfract software. The models obtained coincide well and they indicate a big diabase unit and metamorphic rocks together with sediment rocks and clastic moraine material. Wide range of resistivities is due to fractured rocks, caused by numerous faults, which are saturated with water that contributes the resistivity reduction.

Abstract (croatian)

Geofizička istraživanja provedena su u rudarskom području Hinterburg, u kamenolomu tvrtke Diabaswerk Saalfelden GmbH u Austriji, u kojem već duže vrijeme postoji problem klizanja terena kao posljedice složenih strukturnih geoloških uvjeta i problema s procjeđivanjem vode. Prema dosadašnjim istraživanjima, na ovom području nalaze se paleozojske metamorfne i sedimentne stijene, bazaltni eruptivi te kvartarni aluvijalni morenski materijal. Metodama električne tomografije i seizmičke refrakcije utvrđeni su litološki i strukturni odnosi, kao i prisutnost vode te njezin utjecaj. Izmjerena su četiri električna profila (p1, p2, p3, p4) te dva seizmička profila (P1 i P4). Rezultati električnih mjerenja provedeni su pomoću višeelektrodnog sustava koristeći GeoTest softver, a modeli otpornosti dobiveni su pomoću softvera DC2DInvRes i Res2dinv. Rezultati refrakcijskog seizmičkog mjerenja provedeni su pomoću Summit X One tehnologije, a modeli seizmičkih brzina dobiveni su softverom Rayfract. Modeli se u velikoj mjeri podudaraju i ukazuju na veliko dijabazno tijelo te metamorfne stijene zajedno sa sedimentnim stijenama i klastičnim morenskim materijalom. Širok raspon otpornosti uzrokovan je brojnim rasjedima koji stijene čine razlomljenijima te time pogodnim za infiltraciju vode koja doprinosi smanjenju otpornosti stijena.

• Keywords: electrical resistivity tomography; seismic refraction; inversion; quarry; diabase rock; land sliding
• Keywords (croatian): električna tomografija; seizmička refrakcija; inverzno modeliranje; kamenolom; dijabazi; klizište
• Language: english
• URN:NBN: urn:nbn:hr:169:124305
• Study programme: Title: Geological engineering; specializations in: Hydrogeology and engineering geology, Environmental geology; Course: Hydrogeology and engineering geology; Study programme type: university; Study level: graduate; Academic / professional title: magistar/magistra inženjer/inženjerka geološkog inženjerstva (magistar/magistra inženjer/inženjerka geološkog inženjerstva)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Open access
• Created on: 2018-06-08 08:45:21