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Model of rock melt penetration into in radial fractures evolved under high pressure and temperature conditions
Model prodiranja rastopa stena u radijalne frakture koje se šire u uslovima visokog pritiska i temperature
aTechnical University of Košice, BERG Faculty, Košice, Slovakia bTechnical University of Košice, Faculty of Electrotechnics and Informatics, Košice, Slovakia
email: pavol.rybar@tuke.sk, lubomir.strba@tuke.sk, stefan.molokac@tuke.sk, maria.rybarova@tuke.sk, dusan.kudelas@tuke.sk, dusan.domaracky@tuke.sk, mario.molokac@tuke.sk, ladislav.hvizdak@tuke.sk
Abstract
Deep deposit extractions require research in new technologies of mineral resource search and exploitation. Thermal contact less methods give good opportunity to drill relatively great depths. According to findings of theoretical and practical studies, radial fractures evolve in thermally strained rock environ. Therefore, for the new drilling method research, it is necessary to study both drilled rock and resulting melt in detail. This paper deals with rock melt and its possible penetration into fractures formed during drilling process. Simultaneous recording of TG and DTA using thermoanalyzer SETARAM TGTDA92 was made to determine phase transitions and rock melting temperatures. Using ANSYS13 software, it was possible to create CAD model and to determine the behavior of melted rock and rock melt. The results of the study are meant for their practical use during the vertical drilling processes.
Sažetak
Ekstrakcije iz dubokih ležišta zahtevaju istraživanje u oblasti novih tehnologija potrage za mineralnim resursima i njihove eksploatacije. Termičke bezkontaktne metode pružaju priliku da se buši na relativno velikim dubinama. Prema nalazima teorijskih i praktičnih proučavanja, radijalne frakture se šire u okolini termički deformisane stene. S toga, za istraživanje novih metoda bušenja, potrebno je detaljno proučiti kako stenu koja se buši tako i nastali rastop. Ovaj rad se bavi rastopom stene i njegovim mogućim prodiranjem u frakture koje se formiraju tokom procesa bušenja. Izvršeno je istovremeno beleženje vrednosti TG i DTA pomoću termo-analizatora SETARAM TGTDA 92 kako bi se odredili fazni prelazi i temperature topljenja stene. Korišćenje softvera ANSYS 13 omogućilo je da se kreira CAD model i odredi ponašanje istopljene stene i rastopa stene. Rezultati proučavanja su namenjeni za njihovu praktičnu primenu tokom procesa vertikalnog bušenja.
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