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Öğe Authors' reply to the discussion by A. Karakus on the paper "Predicting the sawability of carbonate rocks using multiple curvilinear regression analysis"(Elsevier BV, 2006) Kahraman S.; Fener M.; Gunaydin O.[No abstract available]Öğe Multifactorial fuzzy approach to the sawability classification of building stones(2007) Tutmez B.; Kahraman S.; Gunaydin O.The performances of circular sawing with diamond impregnated tools were evaluated in stone processing plants located in some areas of Turkey. Samples were collected from these factories for the laboratory tests. Uniaxial compressive strength, tensile strength, Schmidt hammer value, point load strength, impact strength, Los Angeles abrasion loss and P-wave velocity were determined in the laboratory. Performance measurements and stone properties were evaluated by using the multifactorial fuzzy approach which is a special case of multiple objective multifactorial decision making for the sawability classification of building stones. Using three different decision functions, the sawing performances of diamond saws were classified into three categories: excellent, good and poor. It is possible to evaluate the sawability and select a suitable diamond saw for a new building stone by only some stone properties testing using the developed fuzzy classification system. © 2006 Elsevier Ltd. All rights reserved.Öğe Performance prediction of a jumbo drill in ankara-pozanti motorway tunnel (Turkey)(2006) Kahraman S.; Ipek M.; Guleryuz U.; Gunaydin O.In this study, the performance prediction of a jumbo drill used in Pozanti-Ankara Motorway Tunnel (Kirkgecit-1) was investigated. The performance of the drill was observed in once every 50 meters of the tunnel route. Rock blocks were collected from each observation points for the laboratory tests. In addition, joint count was performed on the tunnel face in each observation point. Schmidt hammer, P-wave velocity, impact strength and density values of the rock samples were determined in the laboratory. For each observation point, volumetric joint count (JV), which is defined as the sum of the number of joints per meter for each joint set, was calculated from joint measurements. Penetration rates of the drill were firstly correlated with rock properties. It was found that there was no correlation between the penetration rate and intact rock properties. This is due to the fact that rock properties belonging to each observation point are approximately same. Then, penetration rates were correlated with Jv values and found strong correlation. Penetration rate linearly decreases with increasing Jv values. Concluding remark is that, if the intact rock properties are approximately same, drilling performance of jumbo drill depends largely on the discontinuities on the rock mass.Öğe Predicting the sawability of carbonate rocks using multiple curvilinear regression analysis(2004) Kahraman S.; Fener M.; Gunaydin O.Performance measurements of large-diameter circular saws were conducted on 13 different carbonate rocks in marble factories located in Turkey. Rock samples were collected from the factories for laboratory tests. Cohesion, friction angle, uniaxial compressive strength, tensile strength, Schmidt hammer value, point load strength, impact strength, Los Angeles abrasion loss and P-wave velocity values were determined in the laboratory. Slab production and rock properties were evaluated using multiple curvilinear regression analysis and estimation models were developed. Advancing rate of saw, saw diameter, depth of cut, tensile strength and impact strength were included for the best model. Alternative and more universal models were developed, including each rock property in turn together with the rotational speed of the saw. The developed models were verified by statistical tests.It was concluded that the slab production of carbonate rocks using large-diameter circular saws can reliably be estimated using one of the developed models. The models which include Schmidt hammer value, point load strength, impact strength and P -wave velocity have practical and economical advantages for the stone industry. © 2004 Elsevier Ltd. All rights reserved.Öğe Predicting the Schmidt hammer values of in-situ intact rock from core sample values(2002) Kahraman S.; Fener M.; Gunaydin O.[No abstract available]Öğe Predicting the UCS of pyroclastic rocks from the slake durability index(2010) Kahraman S.; Fener M.; Gunaydin O.The prediction of the uniaxial compressive strength (UCS) from indirect methods is widely used for the preliminary investigations. In this study, the possibility of predicting the UCS from the slake durability index (SDI) was investigated for pyroclastic rocks. For this purpose, pyroclastic rocks were collected from 32 different locations in Cappadocian Volcanic Province of Turkey. The UCS and the SDI tests were carried out on the samples in the laboratory. The dry and saturated UCS values were correlated with the SDI values and strong exponential relations were obtained. However, it was seen that there is a little change in the SDI values over the dry UCS values of 25 MPa and the saturated UCS values of 15 MPa. Concluding remark is that the developed equations are valid for the pyroclastic rocks having dry UCS values of lower than 25 MPa or having saturated UCS values of lower than 15 MPa. © 2010 Taylor & Francis Group, London.Öğe Sawability prediction of carbonate rocks from brittleness indexes(2004) Gunaydin O.; Kahraman S.; Fener M.Performance measurements of large-diameter circular saws were conducted on eight different carbonate rocks in marble factories located in some areas of Turkey. Rock samples were collected from these factories for laboratory tests. Uniaxial compressive strength, tensile strength and impact strength were determined in the laboratory. The brittleness of B3 (the ratio of compressive strength minus tensile strength to compressive strength plus tensile strength), the brittleness of B5 (the product of percentage fines in the impact strength test and compressive strength) and the brittleness of B8 (half of the product of compressive strength and tensile strength) were calculated from the test results. Hourly slab productions were correlated with brittleness indexes. It was concluded that sawability of carbonate rocks can best be predicted from the brittleness of B8.Öğe The effect of water saturation on the strength of marbles(International Society for Rock Mechanics, 2008) Kahraman S.; Gunaydin O.; Fener M.Uniaxial compressive strength (UCS), Brazilian tensile strength (BTS) and point load strength (Is) of rocks are commonly used for the rock engineering applications. These important rock properties are strongly influenced by the water saturation. In this study, to investigate the effects of water saturation on the strengths of marbles, the UCS, BTS and Is tests were carried out on eight different marble types in the laboratory. The evaluation of results showed that the strength losses due to saturation ranges from 5.0 % to 25.3 % for UCS, from 5.1 % to 20.9 % for BTS, and from 5.6 % to 14.4 % for Is, respectively. The ratios between saturated and dry strength ranges from 74.7 % to 94.9 % for UCS, from 79.1 % to 94.9 % for BTS, and from 85.6 % to 94.4 % for Is, respectively. Linear regression equations between saturated and dry-rock strength values were also derived. The saturated UCS, BTS and Is of marbles can be predicted from the dry UCS, BTS and Is using the developed equations. Keywords: Marbles; Water saturation; Uniaxial compressive strength; Tensile strength; Point load strength. © ISRM International Symposium - 5th Asian Rock Mechanics Symposium 2008, ARMS 2008. All rights reserved.
