Utjecaj dijagenetskih i tektonskih procesa u dolomitima na njihovo sitnjenje

Scientific paper - Original scientific paper

• Title (english): The influence of diagenetic and tectonic processes in dolomites on the grinding
• Author: Ivan Tomašić
• Author: Branko Salopek
• Author: Dragan Krasić
• Author's institution: University of Zagreb; Faculty of Mining, Geology and Petroleum Engineering; (Department of Mineralogy, Petrology and Mineral Resources)
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Mining, Petroleum and Geology Engineering

Abstract (croatian)

U radu je analiziran utjecaj dijagenetskih i tektonskih procesa na sposobnost sitnjenja dolomita. Uzorci stijene uzeti su iz dva dijagenetski različita tipa ležišta i to posebno iz kompaktnog i tektoniziranog dijela stijenske mase. Testovima mljevenja u laboratorijskom mlinu s kuglama određene su vrijednosti intenziteta sitnjenja (S) i Bondovog radnog indeksa (BWI). Usporedbom ovih vrijednosti s petrografskim i strukturno-teksturnim karakteristikama analiziranih uzoraka utvrđeno je da mikropukotinski defekti utječu na sitnjenjc zrna manjih od približno 1 do 2 mm. Pri tome veći otpor sitnjenju pružaju stijene višeg stupnja uređenosti kristalne rešetke kao i stijene u kojima su rekristalizacijom nastali čisti pravilni kristali dolomita.

Abstract (english)

Origin and occurence of dolomites are important for the physical and mechanical properties, especially grinding. The influence of diagenetic and tectonic processes in dolomites on the grinding of rocks was investigated in samples from two diag-netically different deposit types, and that separately from the compact and tectonized part of the rock masses. The grinding tests were carried out in a ball mill. By petrographic and granulometric analysis as well as by determination of the grinding rate and Bond's Working Index it was found that the state of rock fissures influences the crushability down to grain sizes even of 1...2 mm, and that the grinding rate is lower for rocks of higher crystal lattice order and a higher content of small crystals. Also, samples with clean regular crystals, formed by recrystallization, manifest a stronger resistance to grinding.

• Keywords (croatian): dolomiti; dijagenetski i tektonski procesi; sitnjenje
• Keywords (english): dolomites; diagenetic and tectonic processes; grinding
• Language: croatian
• Publication type: Scientific paper - Original scientific paper
• Publication status: Published
• Peer review: Peer review - international
• Publication version: Published version
• Journal title: Rudarsko-geološko-naftni zbornik
• Numbering: vol. 2, no. 1, pp. 47-51
• p-ISSN: 0353-4529
• e-ISSN: 1849-0409
• URN:NBN: urn:nbn:hr:169:874849
• Publication: 1990
• Document URL: https://hrcak.srce.hr/24707
• Type of resource: Text
• Access conditions: Open access
• Created on: 2024-04-03 12:10:04