2003, iss. 1-2, pp. 83-85
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Correlation relationship between permanence of drill bit and index of rock quality (RQD) per deer
Korelacioni odnos između trajnosti bušaćeg dleta i indeksa kvaliteta stena RQD po Dir-u
aUniversity of Priština - Kosovska Mitrovica, Faculty of Technical Science, Serbia
bUniversity of Belgrade, Faculty of Mining and Geology, Serbia
Abstract
This work presents a possibility of establishment the correlation relationships between permanence of drill bits and index of rock quality (RQD) per Deer. Permanence of drill bit is followed, at broader locality of the Kopaonik massif in working media, by compressive strength of 23-160 Mpa, i.e. coefficient of rock hardness per Protogakon¨s of f=2.3-16. Drilling was carried out by the use of RK-28 hammer drill, and drill-hole diameter was d=32 mm. By analyzing the obtained results, graphical and analytical dependence were established between permanence of drill bit and the most important parameters of rock mass.
Sažetak
U ovom radu prikazana je mogućnost uspostavljanja korelacije između Trajnosti bušaćih dleta i indeksa kvaliteta stenske mase (RQD) po Dir-u (Deere). Trajnost bušaćeg dleta praćena je na širem lokalitetu kopaoničkog masiva u radnoj sredini sa pritisnom čvrstoćom od 23-160 MPa, odnosno koeficijentom čvrstoće stene po Protođakonovu od f=2,3-16. Bušeno je bušaćim čekićem RK-28, a prečnik bušotine bio je d=32 mm. Analizom rezultata uspostavljena je grafička i analitička zavisnost između trajnosti bušaćeg dleta i najvažnijih parametara stenske mase.
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