Determining the dominant rock properties affecting the impact hammer performance

S. Hojjati; D. Tumac

doi:10.1201/9781315388502-157

Determining the dominant rock properties affecting the impact hammer performance

S. Hojjati, D. Tumac

Department of Mining Engineering

Istanbul Technical University

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

Abstract

Researchers have consistently made endeavors to suggest more accurate performance prediction models for mechanical excavators. Apart from machine related parameters, physical and mechanical properties of rocks have an impact on excavation performance. In this research, using the data collected from Levent- Hisarüstü metro tunnel (Istanbul), an attempt was made to find the rock properties that are more closely related to performance of impact hammers. The tunnel was divided into 60 zones. For each zone, the instantaneous breaking rate (IBR) of the hammer used to excavate the tunnel was recorded. The rock quality designation (RQD), uniaxial compressive strength (UCS), Brazilian tensile strength (BTS), density (ρ), Schmidt hammer hardness (SHH), Shore Scleroscope hardness (SSH), and Cerchar abrasivity index (CAI) were realized for each zone. Next, the correlations between each possible pair of the rock properties were investigated. The results were tested for significance at 0.99 and 0.95 confidence intervals.

Original language	English
Title of host publication	Rock Mechanics and Rock Engineering
Subtitle of host publication	From the Past to the Future
Editors	Resat Ulusay, Mehmet Ali Hindistan, Ergün Tuncay, Ömer Aydan, Hasan Gerçek
Publisher	CRC Press/Balkema
Pages	907-912
Number of pages	6
ISBN (Print)	9781138032651, 9781138032651
DOIs	https://doi.org/10.1201/9781315388502-157
Publication status	Published - 2016
Event	International Symposium on International Society for Rock Mechanics, ISRM 2016 - Cappadocia, Turkey Duration: 29 Aug 2016 → 31 Aug 2016

Publication series

Name	Rock Mechanics and Rock Engineering: From the Past to the Future
Volume	2

Conference

Conference	International Symposium on International Society for Rock Mechanics, ISRM 2016
Country/Territory	Turkey
City	Cappadocia
Period	29/08/16 → 31/08/16

Bibliographical note

Publisher Copyright:
© 2016 Taylor & Francis Group, London.

Access to Document

10.1201/9781315388502-157

Cite this

Hojjati, S., & Tumac, D. (2016). Determining the dominant rock properties affecting the impact hammer performance. In R. Ulusay, M. A. Hindistan, E. Tuncay, Ö. Aydan, & H. Gerçek (Eds.), Rock Mechanics and Rock Engineering: From the Past to the Future (pp. 907-912). (Rock Mechanics and Rock Engineering: From the Past to the Future; Vol. 2). CRC Press/Balkema. https://doi.org/10.1201/9781315388502-157

Hojjati, S. ; Tumac, D. / Determining the dominant rock properties affecting the impact hammer performance. Rock Mechanics and Rock Engineering: From the Past to the Future. editor / Resat Ulusay ; Mehmet Ali Hindistan ; Ergün Tuncay ; Ömer Aydan ; Hasan Gerçek. CRC Press/Balkema, 2016. pp. 907-912 (Rock Mechanics and Rock Engineering: From the Past to the Future).

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title = "Determining the dominant rock properties affecting the impact hammer performance",

abstract = "Researchers have consistently made endeavors to suggest more accurate performance prediction models for mechanical excavators. Apart from machine related parameters, physical and mechanical properties of rocks have an impact on excavation performance. In this research, using the data collected from Levent- Hisar{\"u}st{\"u} metro tunnel (Istanbul), an attempt was made to find the rock properties that are more closely related to performance of impact hammers. The tunnel was divided into 60 zones. For each zone, the instantaneous breaking rate (IBR) of the hammer used to excavate the tunnel was recorded. The rock quality designation (RQD), uniaxial compressive strength (UCS), Brazilian tensile strength (BTS), density (ρ), Schmidt hammer hardness (SHH), Shore Scleroscope hardness (SSH), and Cerchar abrasivity index (CAI) were realized for each zone. Next, the correlations between each possible pair of the rock properties were investigated. The results were tested for significance at 0.99 and 0.95 confidence intervals.",

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doi = "10.1201/9781315388502-157",

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Hojjati, S & Tumac, D 2016, Determining the dominant rock properties affecting the impact hammer performance. in R Ulusay, MA Hindistan, E Tuncay, Ö Aydan & H Gerçek (eds), Rock Mechanics and Rock Engineering: From the Past to the Future. Rock Mechanics and Rock Engineering: From the Past to the Future, vol. 2, CRC Press/Balkema, pp. 907-912, International Symposium on International Society for Rock Mechanics, ISRM 2016, Cappadocia, Turkey, 29/08/16. https://doi.org/10.1201/9781315388502-157

Determining the dominant rock properties affecting the impact hammer performance. / Hojjati, S.; Tumac, D.
Rock Mechanics and Rock Engineering: From the Past to the Future. ed. / Resat Ulusay; Mehmet Ali Hindistan; Ergün Tuncay; Ömer Aydan; Hasan Gerçek. CRC Press/Balkema, 2016. p. 907-912 (Rock Mechanics and Rock Engineering: From the Past to the Future; Vol. 2).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

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Hojjati S, Tumac D. Determining the dominant rock properties affecting the impact hammer performance. In Ulusay R, Hindistan MA, Tuncay E, Aydan Ö, Gerçek H, editors, Rock Mechanics and Rock Engineering: From the Past to the Future. CRC Press/Balkema. 2016. p. 907-912. (Rock Mechanics and Rock Engineering: From the Past to the Future). doi: 10.1201/9781315388502-157

Determining the dominant rock properties affecting the impact hammer performance

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Bibliographical note

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