Viability assessment of cerchar abrasivity test for the anisotropic brisbane rocks
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Tarih
2015
Yazarlar
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
International Society for Rock Mechanics
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
With the increased use of mechanized rock excavation, there have been developed internationally a number of methods to assess the abrasivity of rock materials. These methods range from determination of abrasive and hard mineral content using petrographic thin section analysis to weight loss or rate of wear flat development on specified test pieces. The Cerchar abrasivity index (CAI) test has been widely accepted for the assessment of rock abrasiveness and is determined as the abrasion of a steel pin after scratching over the freshly-broken or saw-cut surface of a rock. Two types of testing devices are in use today: (i) the original 'Cerchar apparatus', and (ii) the 'West apparatus', which was adopted herein. The CAI is calculated from the measured diameter of the resulting wear flat on the steel pin after 10mm scratching. This test has been considered to provide a reliable indication of rock abrasiveness for isotropic rocks. However, a great amount of rocks in natureis anisotropic. Phyllite is an anisotropic and foliated metamorphic rock and various types of phyllite specimens were tested in this research. Although phyllite is a type of rock primarily composed of quartz and the expected CAI value can be high, mechanical cutting of this rock should not be very problematic compared with igneous rocks have same CAI value. As phyllite is a foliated metamorphic rock, most of the specimens split into sheets through the quartz seam by the tip during scratching normal to the axis of quartz seams. Hence, viability assessment of Cerchar abrasivity test and F-Schimazek index values for the anisotropic rocks is investigated in this research. © 2015 by the Canadian Institute of Mining, Metallurgy & Petroleum and ISRM.
Açıklama
13th ISRM International Congress of Rock Mechanics 2015 -- 10 May 2015 through 13 May 2015 -- Montreal -- 133167
Anahtar Kelimeler
Abrasiveness of anisotropic rocks, CAI, Cerchar testing, F-Schimazek index
Kaynak
13th ISRM International Congress of Rock Mechanics
WoS Q Değeri
Scopus Q Değeri
Cilt
2015- MAY
