A new approach to rock brittleness and its usability at prediction of drillability

Rock brittleness is one of the most important issues in rock drilling and cutting. The relations between drillability and brittleness will assist engineers in excavation works. The demand for representative rock parameters related to planning of underground excavations is increasing, as these parameters constitute fundamental input for obtaining the most reliable cost and time estimates. In rock cutting mechanics, the effects of the rock and brittleness on the efficiency of drilling and excavation are examined by many researchers. In this study, 41 different rock types were tested in laboratory to investigate the relations between the drilling rate index and different brittleness values. Firstly, the relations defined in literature are tested. Strength tests are made according to International Society for Rock Mechanics standards. In addition Norwegian University of Science and Technology standards are used to determine drilling rate index. Then, a new brittleness index is proposed which is the arithmetic average of uniaxial compressive strength and tensile strength. Considering the regression analysis carried out, it was seen that the proposed formula showed good correlation for these samples handled in this study. As a result of this study, a high correlation is obtained between the proposed index and drilling rate index values (R:0.84). The results are found to be at least reliable as well as other brittleness equations given in literature. © 2016 Elsevier Ltd.

Yazar Özfirat M.K.
Yenice H.
Şimşir F.
Yarali O.
Yayın Türü Article
Tek Biçim Adres https://hdl.handle.net/20.500.12628/3970
Tek Biçim Adres 10.1016/j.jafrearsci.2016.03.017
Konu Başlıkları Brittleness
Drillability
Drilling rate index
Rock material
Koleksiyonlar Araştırma Çıktıları | WoS | Scopus | TR-Dizin | PubMed | SOBİAD
Scopus İndeksli Yayınlar Koleksiyonu
WoS İndeksli Yayınlar Koleksiyonu
Dergi Adı Journal of African Earth Sciences
Dergi Cilt Bilgisi 119
Sayfalar 94 - 101
Yayın Yılı 2016
Eser Adı
[dc.title]
A new approach to rock brittleness and its usability at prediction of drillability
Yazar
[dc.contributor.author]
Özfirat M.K.
Yazar
[dc.contributor.author]
Yenice H.
Yazar
[dc.contributor.author]
Şimşir F.
Yazar
[dc.contributor.author]
Yarali O.
Yayın Yılı
[dc.date.issued]
2016
Yayıncı
[dc.publisher]
Elsevier Ltd
Yayın Türü
[dc.type]
article
Özet
[dc.description.abstract]
Rock brittleness is one of the most important issues in rock drilling and cutting. The relations between drillability and brittleness will assist engineers in excavation works. The demand for representative rock parameters related to planning of underground excavations is increasing, as these parameters constitute fundamental input for obtaining the most reliable cost and time estimates. In rock cutting mechanics, the effects of the rock and brittleness on the efficiency of drilling and excavation are examined by many researchers. In this study, 41 different rock types were tested in laboratory to investigate the relations between the drilling rate index and different brittleness values. Firstly, the relations defined in literature are tested. Strength tests are made according to International Society for Rock Mechanics standards. In addition Norwegian University of Science and Technology standards are used to determine drilling rate index. Then, a new brittleness index is proposed which is the arithmetic average of uniaxial compressive strength and tensile strength. Considering the regression analysis carried out, it was seen that the proposed formula showed good correlation for these samples handled in this study. As a result of this study, a high correlation is obtained between the proposed index and drilling rate index values (R:0.84). The results are found to be at least reliable as well as other brittleness equations given in literature. © 2016 Elsevier Ltd.
Kayıt Giriş Tarihi
[dc.date.accessioned]
2019-12-23
Açık Erişim Tarihi
[dc.date.available]
2019-12-23
Yayın Dili
[dc.language.iso]
eng
Konu Başlıkları
[dc.subject]
Brittleness
Konu Başlıkları
[dc.subject]
Drillability
Konu Başlıkları
[dc.subject]
Drilling rate index
Konu Başlıkları
[dc.subject]
Rock material
Haklar
[dc.rights]
info:eu-repo/semantics/closedAccess
ISSN
[dc.identifier.issn]
1464343X
Sponsor YAYINCI
[dc.description.sponsorship]
2007KBFEN53
Sponsor YAYINCI
[dc.description.sponsorship]
This study was supported by Scientific Research Coordinator of Dokuz Eylul University under the project number of 2007KBFEN53. The authors gratefully acknowledge reviewers for contribution to the study and also special thanks to Prof. Dr. Bjorn Nilsen (NTNU, Norway), Filip Dahl (SINTEF, Norway) and Prof. Dr. Amund Bruland (NTNU, Norway) for developing drilling rate index test procedures.
İlk Sayfa Sayısı
[dc.identifier.startpage]
94
Son Sayfa Sayısı
[dc.identifier.endpage]
101
Dergi Adı
[dc.relation.journal]
Journal of African Earth Sciences
Dergi Cilt Bilgisi
[dc.identifier.volume]
119
Tek Biçim Adres
[dc.identifier.uri]
https://dx.doi.org/10.1016/j.jafrearsci.2016.03.017
Tek Biçim Adres
[dc.identifier.uri]
https://hdl.handle.net/20.500.12628/3970
Görüntülenme Sayısı ( Şehir )
Görüntülenme Sayısı ( Ülke )
Görüntülenme Sayısı ( Zaman Dağılımı )
Görüntülenme
12
09.12.2022 tarihinden bu yana
İndirme
1
09.12.2022 tarihinden bu yana
Son Erişim Tarihi
29 Ocak 2024 02:51
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Tıklayınız
brittleness drilling between proposed relations reliable different tested literature standards strength correlation values excavation cutting parameters analysis showed formula carried increasing regression tensile compressive uniaxial average arithmetic important Considering Elsevier equations samples results obtained result
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