Suda Dağılmaya Karşı Duraylılık İndeksinden Magmatik Kayaçların Dayanım Parametrelerinin Tahmini
Bu çalışma suda dağılmaya karşı duraylılık indeksi (SDİ) kullanılarak magmatik kayaçların dayanım parametrelerini (nokta yük dayanımı, tek eksenli basma dayanımı ve Brazilian çekme dayanımı) tahmin etmek için istatistiksel modeller geliştirmek ve değerlendirmek amacıyla yapılmıştır. Orta Anadolu bölgesinden toplanan 23 farklı magmatik kaya örneği test edilerek kayaçların indeksleri, mekanik özellikleri ve suda dağılmaya karşı duraylılık indeksleri belirlenmiştir. Dayanım parametreleri ile SDİ arasında çok yüksek üssel ilişki belirlenmiş olup SDİ’nin %98’den büyük olduğu değerleri için geliştirilen denklemlerin dayanım değerlerini tahmin edemediği saptanmıştır. SDİ değerinin % 98’den büyük ve küçük olması durumları için ise dayanım parametreleri ile SDİ arasındaki ilişkiler yeniden değerlendirilmiş ve dayanım parametreleri için çok yüksek korelasyon elde edilmiştir. Geliştirilen bu deneysel eşitlikler benzer jeomekanik karakterdeki magmatik kayaçlar için de uygulanabilir özelliktedir.
Predicting Strength Parameters of Igneous Rocks from Slake Durability Index
The aim of this study is to evaluate and develop statistical models for predicting the strengthparameters (point load strength, uniaxial compressive strength and Brazilian tensile strength) ofigneous rocks, using slake durability index (SDI). In this study, the index, mechanical and slake durabilityindex parameters of the 23 rock samples collected from different locations of the Central Anatolia havebeen detected by testing. A very high exponential relation between the strength parameters and SDIwas found out. However, it has seen that the equations developed cannot estimate the strengthparameters when SDI values greater than 98%. The relationship between strength parameters and SDIwas reexamined in the case of SDI values being greater and less than 98%, and very high correlationswere developed for strength parameters. These developed empirical equations can be applicable forigneous rocks having similar geomechanical properties.
___
- Altindag, R., 2012. Correlation between P-wave
velocity and some mechanical properties for
sedimentary rocks. Journal of the Southern African
Institute of Mining and Metallurgy, 112, 229–237.
- ASTM D2938, 1995. Standard test method for
unconfined compressive strength of intact rock
core specimens. American Society for Testing and
Materials International, West Conshohocken, 11.
- ASTM D4644, 1998. Standard test method for slake
durability of shales and similar weak rocks.
American Society for Testing and Materials
International, West Conshohocken, 3.
- ASTM D5731, 2005. Standard test method for
determination of the point load strength index of
rock. American Society for Testing and Materials
International, West Conshohocken, 8.
- Bieniawski, Z.T. and Bernede, M.J., 1979. Suggested
methods for determining the uniaxial compressive
strength and deformability of rock materials: Part
1.
Suggested
method
for
determining
deformability of rock materials in uniaxial
compression. In International Journal of Rock
Mechanics and Mining Sciences & Geomechanics
Abstracts 16, 138-140.
- Bozkurtoğlu, E. and Mert, E., 2012. Kandıra taşının
dayanım-suda dağılmaya karşı duraylılık ilişkisi.
Uygulamalı Yer Bilimleri, 1, 30–50.
- Cargill, J.S. and Shakoor, A., 1990. Evaluation of
empirical methods for measuring the uniaxial
compressive strength of rock. International Journal
of Rock Mechanics and Mining Sciences &
Geomechanics Abstracts, 27, 495–503.
- Chandra, R., 1970. Slake durability test for rocks. M.Sc.
Thesis, Imperial College, London, 54.
- Dhakal, G., Yoneda, T., Kato, M. and Kaneko, K., 2002.
Slake durability and mineralogical properties of
some pyroclastic and sedimentary rocks.
Engineering Geology, 65, 31–45.
- Dinçer, İ., Acar, A. and Ural, S., 2008. Estimation of
strength and deformation properties of
Quaternary caliche deposits. Bulletin of
Engineering Geology and the Environment, 67,
353–366.
- Fener, M. and Ince, I., 2012. Influence of orthoclase
phenocrysts on point load strength of granitic
rocks. Engineering Geology, 141–142, 24–32.
- Franklin, J.A. and Chandra, R., 1972. The slake-
durability test. International Journal of Rock
Mechanics and Mining Sciences & Geomechanics
Abstracts, 9, 325–328.
- Gamble, J.C., 1971. Durability-plasticity classification
of shales and other argillaceous rocks. Ph.D. Thesis,
University of Illinois at Urbana-Champaign,
Champaign, 161.
- Gökceoğlu, C., Ulusay, R. and Sönmez, H., 2000.
Factors affecting the durability of selected weak
and clay-bearing rocks from Turkey, with particular
emphasis on the influence of the number of drying
and wetting cycles. Engineering Geology, 57, 215–
237.
- Hoek, E. and Brown, E.T., 1980. Underground
excavations in rock, Institute of Minning and
Metallurgy, London, 527.
- ISRM, 1981. The Complete International Society for
Rock Mechanics (ISRM) Suggested Methods for
Rock Characterization, Testing and Monitoring:
1981. In: Brown, E.T. (eds.), Pergamon Press,
Oxford, 211.
- ISRM, 1985. The Complete International Society for
Rock Mechanics (ISRM) Suggested Methods for
Determining Point Load Strength. International
Journal of Rock Mechanics and Mining Sciences &
Geomechanics Abstracts, 22, 51–60.
- ISRM, 2007. The Complete International Society for
Rock Mechanics (ISRM) Suggested Methods for
Rock Characterization, Testing and Monitoring: 1974-2006. In: Ulusay, R. and Hudson, J. (eds.),
International Society for Rock Mechanics (ISRM)
Turkish National Group, Ankara, Turkey, 628.
- Kahraman, S., Fener, M. and Gunaydin, O., 2017.
Estimating the uniaxial compressive strength of
pyroclastic rocks from the slake durability index.
Bulletin of Engineering Geology and the
Environment, 76, 1107–1115.
- Koncagül, E.C. and Santi, P.M., 1999. Predicting the
unconfined compressive strength of the Breathitt
shale using slake durability, Shore hardness and
rock structural properties. International Journal of
Rock Mechanics and Mining Sciences, 36, 139–153.
- Sarkar, K., Vishal, V. and Singh, T., 2012. An empirical
correlation of index geomechanical parameters
with
the
compressional
wave
velocity.
Geotechnical and Geological Engineering, 30, 469–
479.
- Sharma, P., Khandelwal, M. and Singh, T., 2011. A
correlation between Schmidt hammer rebound
numbers with impact strength index, slake
durability index and P-wave velocity. International
Journal of Earth Sciences, 100, 189–195.
- Sharma, P. and Singh, T., 2008. A correlation between
P-wave velocity, impact strength index, slake
durability index and uniaxial compressive strength.
Bulletin of Engineering Geology and the
Environment, 67, 17–22.
- Ulusay, R., Arikan, F., Yoleri, M. and Çağlan, D., 1995.
Engineering geological characterization of coal
mine waste material and an evaluation in the
context of back-analysis of spoil pile instabilities in
a strip mine, SW Turkey. Engineering Geology, 40,
77–101.
- Yagiz, S., 2011a. Correlation between slake durability
and rock properties for some carbonate rocks.
Bulletin of Engineering Geology and the
Environment, 70, 377–383.
- Yagiz, S., 2011b. P-wave velocity test for assessment of
geotechnical properties of some rock materials.
Bulletin of Materials Science, 34, 947–953.
- Yagiz, S., Sezer, E. and Gokceoglu, C., 2012. Artificial
neural networks and nonlinear regression
techniques to assess the influence of slake
durability cycles on the prediction of uniaxial
compressive strength and modulus of elasticity for
carbonate rocks. International Journal for
Numerical
and
Analytical
Methods
in
Geomechanics, 36, 1636–1650.