Title Model za procjenu primjenjivosti tehnologija otkopavanja u odnosu na značajke stijenske mase : doktorski rad Title (english) Model for the assessment of the applicability of excavation technologies in relation to the rock mass characteristics : doctoral thesis Author Jasmin Jug Mentor Petar Hrženjak (mentor)Committee member Tomislav Korman (predsjednik povjerenstva)Committee member Mario Klanfar (član povjerenstva)Committee member Mario Dobrilović (član povjerenstva)Committee member Zlatko Briševac (član povjerenstva)Committee member Hrvoje Meaški (član povjerenstva)Granter University of Zagreb Defense date and country 2020-06-12, Croatia Scientific / art field, TECHNICAL SCIENCES Universal decimal classificationUDC ) 622 - Mining Abstract Odabir najprikladnije tehnologije otkopavanja jedan je od vrlo važnih zadataka prilikom projektiranja i izvođenja različitih inženjerskih objekata u stijenskim masama. Pregledom raspoložive literature o dosadašnjem razvoju, karakteristikama i korištenju pojedinih metoda za procjenu mogućnosti primjene tehnologija otkopavanja stijenske mase, zaključeno je kako navedeno prije svega ovisi o značajkama intaktne stijene, diskontinuiteta i stijenske mase. Prema tim značajkama stijenska se masa klasificira različitim empirijskim klasifikacijama za procjenu primjenjivosti i učinkovitosti tehnologija otkopavanja, ali ne postoji jedinstvena i općenito prihvatljiva metoda. Zato se pristupilo razvoju modela za procjenu primjenjivosti dostupnih površinskih tehnologija i njihovih mehanizama otkopavanja s obzirom na značajke čvrste stijenske mase. Analizom karakteristika, razlika i mogućnosti primjene postojećih metoda za procjenu mogućnosti otkopavanja, identificirani su utjecaji pojedinih značajki intaktne stijene i stijenske mase na tehnologije i mehanizme otkopavanja, na temelju kojih su utvrđene najvažnije značajke. Definiran je postupak kvalitativne karakterizacije stijenske mase za procjenu njezine podatljivosti razrušavanju i otkopavanju. Osim toga, istražena su i moguća ograničenja pojedinih tehnologija otkopavanja, a uvedena je i klasifikacija mehaničkih tehnologija otkopavanja prema osnovnom mehanizmu izdvajanja komada stijene iz stijenske mase. Na temelju analize svih prikupljenih saznanja i podataka, te dodatno provedenih istraživanja, prvo je predložena metoda za preliminarnu procjenu podatljivosti stijenske mase otkopavanju preko izmjerenih brzina posmičnih seizmičkih valova. Detaljna procjena provodi se pomoću razvijenog jedinstvenog modela za rangiranje i procjenu primjenjivosti tehnologija površinskog otkopavanja čvrstih stijenskih masa na temelju značajki intaktnog stijenskog materijala, strukturnih značajki i značajki stijenske mase, uz mogućnost korištenja dodatno postavljenih uvjeta i specifičnosti otkopavanja. Model je zasnovan na višekriterijskoj analizi za donošenje odluka i procjenu optimalne varijante rješenja, uz primjenu metode PROMETHEE. Validacija predložene metode i modela provedena je na više prikladnih lokacija koje su odabrane s ciljem obuhvaćanja što više vrsta čvrste stijenske mase tipičnih za područje Republike Hrvatske. Na odabranim lokacijama provedena su istraživanja kroz karakterizaciju i ocjenu stijenske mase, na temelju kojih su dobiveni parametri iskorišteni kao ulazni podaci za analize. Procjene predloženih metoda uspoređene su sa stvarno primijenjenim tehnologijama otkopavanja, na temelju čega je utvrđena vrlo visoka razina podudarnosti.
Abstract (english) Selection the most appropriate excavation technology is one of the most important tasks during the design and construction of various engineering objects in rock masses. A review of current literature on the development, characteristics and use of individual methods to evaluate the application of rock mass excavation technologies, it was concluded that stated first of all depends on the characteristics of intact rock, discontinuity and rock mass. According to these features, the rock mass is classified using different empirical classifications for assessing the applicability and efficiency of excavation technologies, but there is no uniform and generally acceptable method. Therefore, a model has been developed to assess the applicability of the available surface technologies and their mechanisms of excavation considering the characteristics of the solid rock mass. By analysing the characteristics, differences and possibilities of applying existing methods for assessing the possibility of excavation, the effects of certain properties of intact rock and rock mass on the technologies and mechanisms of excavation have been identified, and the most important properties were determined. A procedure for the qualitative characterization of rock mass has been defined for assessment the malleability of the same to destruction and excavation.In addition, the possible limitations of certain excavation technologies were investigated, and a classification of mechanical excavation technologies according to the basic mechanism of extracting a piece of rock from a rock mass was introduced. Based on the analysis of the collected information and data, as well as the additional investigations, the method for preliminary assessment of the rock mass excavation malleability was first proposed, over measured shear seismic waves velocities. A detailed assessment is made by developing a unique model for ranking and assessing the applicability of surface technologies for solid rock mass excavation, based on intact rock material properties, rock structure and rock mass properties, with the possibility of using additional set conditions and specificity of excavation. The model is based on multicriteria analysis for decision making and assessing of the most optimal variant of the solution, using the PROMETHEE method. The validation of the proposed method and model was carried out at several suitable locations, which were selected in order to encompass as many types of solid rock mass typical for the Croatia territory. At selected study sites investigations were carried out through the characterization and evaluation of rock mass, and the obtained parameters were used as input data for analysis. The assessments of the proposed methods were compared with actually applied excavation technologies, and a very high level of matching was found.
Keywords
značajke stijenske mase
podatljivost stijena otkopavanju
tehnologije površinskog otkopavanja
seizmičke geofizičke metode
višekriterijska analiza
Keywords (english)
rock mass properties
rock excavation malleability
surface excavation technologies
seismic geophysical methods
multicriteria analysis
Language croatian URN:NBN urn:nbn:hr:169:843105 Promotion 2020 Study programme Title: Applied Geosciences, Mining and Petroleum Engineering Type of resource Text Extent 258 str. ; 30 cm File origin Born digital Access conditions Open access Terms of use Created on 2020-07-06 12:50:29
