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List of products by author: H. Copur
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A New Generation of Portable Linear Rock Cutting Machine (PLCM ) and Comparison with Full Scale Linear Rock Cutting...
Abstract: A new portable linear rock cutting (PLCM) device was developed in the Mining Engineering De-partment of Istanbul Technical University and supported by The Scientific and Technological Re-search Council of Turkey (TUBITAK-112M859). The basic disadvantage of the full-scale linear rock cutting test is that it requires large blocks of rock samples, which are usually difficult, too expen-sive, or...
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A stochastic method for predicting performance of EPB TBMs working in semi-closed / open mode
Abstract: A rock cutting/excavation phenomenon is in stochastic nature, which includes uncertainties in terms of decision makers. This study summarizes a new method for predicting performance (instantaneous penetration rate, daily advance rate, thrust, power, torque, and specific energy) of EPB TBMs by a stochastic method implemented into a deterministic prediction model requiring input from full-scale...
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Analysis of disc cutter consumption of a Double Shield TBM
Abstract: Increasing demand on energy boosted up the construction of hydro-electric power plants (HEPP) in Turkey in the last decade, especially after including the private sector into the energy market. The installed capacity of current HEPPs in Turkey is over 20,000 MW providing for more than 70 billion kWh hydropower energy (Yilmaz et al., 2014). However, after realization of around 1,500 new HEPP...
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Analysis of the Tunnel Boring Machines (TBM) Performance Parameters Using Boreability Index in Turkey
Abstract: Performance prediction and the determination of some design parameters of TBMs are becoming very crucial for tunneling industry since they are critical elements in the pre-planning of a mechanical excavation project. In this paper three case studies are analyzed with a detailed field and laboratory studies concerning in Istanbul. The performance parameters of the TBMs (Cutter forces, i.e.,...
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Cekmekoy-Sancaktepe Metro Tunnel in Istanbul
Abstract: In this study, field observations on cutter wear and breakages in between 2 stations (Carsi and Umraniye) of Uskudar-Umraniye-Cekmekoy-Sancaktepe Metro Tunnel in Istanbul are mentioned in relation to TBM operational conditions (such as instantaneous penetration rate, thrust, torque, etc.) and geological conditions (such as RQD, strength, Cerchar abrasivity), within the context of the projects...
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Cutter Forces Measurement with PLCM© Using Mini Conical Pick: Comparison with the Theoretical and Empirical Models
Abstract: A new portable linear rock cutting (PLCM©) device was developed in the Mining Engineering Department of Istanbul Technical University and supported by The Scientific and Technological Research Council of Turkey (TUBITAK-112M859). In this paper, rock cutting experiments are performed by using mini real-life conical pick with a (PLCM). The conical pick used in this study has an attack angle 45...
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Effect of Adhesion on EPB TBM Performance
Abstract: Mixture of the excavated clay consisting soils and water sometimes generates a sticky muck, which adheres to the metal parts of TBMs such as cutting tools, cutterhead and transportation system causing blockages and stoppages in the job during excavation. This problem may lead to decreasing of advance rate and increasing of the project costs, since the excavation process could only be continued...
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Effect of Conditioning on Soil Workability determined by Mini-Slump and Flow Table Tests
Abstract: Effect of conditioning parameters on workability of sands was investigated by using flow table and newly suggested mini slump tests. The soil conditioning tests were performed on standard mortar sand at two foam types and different Foam Expansion Ratio () and Foam Injection Ratio () values. The foams were characterized by measurements of stability (half-life), density and bubble size. The...
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Effect of Operational Parameters on the Performance of Raise Boring Machine During Pilot Drilling
Abstract: Raise Boring Machines (RBMs) are the fast, safe and efficient drilling / boring machines are used for different purposes in mining and tunnelling especially for excavation of vertical and/or inclined shafts and drifts. The optimum raise boring system is designed or selected based on drilling / excavation performance, which depends mainly on mechanical (machine related), geological /...
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Effect of Soil Conditioning on Performance of an EPB TBM: from Laboratory to Mahmutbey Mecidiyekoy Metro Tunnels in...
Abstract: The basic purpose of this study supported by the Scientific and Technological Research Council of Turkey (TUBITAK, Project No: 213M487) is to analyze the effects of soil conditioning on the field performance of an EPB TBM used for excavation of the Mahmutbey-Mecidiyekoy metro tunnels having a total length of around 18.5 km (double tube) in Istanbul. Soil samples were obtained during the...
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Effect of Soil Conditioning on the EPB-TBM Excavation Performance: A Case Study of Dudullu-Bostanci Metro Project,...
Abstract: The use of underground space for transportation, energy requirement, sanitation and wastewater management is continuously increasing in urban areas. Mechanical excavation of this underground space with Earth Balance Pressure Tunnel Boring Machine (EPBTBM) is one of the most preferred method beneath intensive urban areas. A good soil conditioning can reduce the surface settlement and create a...
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Effects of Cutter Types on Cutter Consumption and TBM Performance in Different and Complex Geological Conditions
Abstract: EPB TBMs are widely utilized for infrastructure and transportation constructions in urban areas as mechanized tunneling is cost effective, safe and rapid when compared to other conventional methods. Today, as a result of technical improvements and increasing demand, design of TBM and cutter head, thus cutter type, cutter size and cutter layout vary in a wide range from manufacturer to...
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How the complex geology of Turkey affected the performance of different TBMs - lessons learnt
Abstract: The use of tunnel boring machines is increasing tremendously in Turkey. However, the complexity of geology causes important failures and inefficiency in mechanical excavation process. In this paper, the problems of frequent changes in geology in Kadikoy-Kartal metro project, and closing the openings; the change of all cutters in Beykoz tunnel in zones having different geological...
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Investigation of the Vibration Patterns Generated During TBM Excavation
Abstract: TBMs are widely utilized for infrastructure projects and to reach favourable excavation rates, selected TBMs should be operated according to the geological conditions. During excavation, cutters that are in contact with excavation face create vibration patterns which then transmitted to the cutterhead and other parts of the TBM. By recording and monitoring the vibration data and analysing the...
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Performance of EPB TBM in Beylerbeyi-Kucuksu Wastewater Tunnel in Istanbul
Abstract: Utilization of TBMs is unavoidable for tunnels considered in urbanized areas to realize fast and cheaper construction and excavation performance of TBMs is very crucial for economy of these projects. Terminology on excavation performance of TBMs includes generally daily and monthly advance rates, instantaneous penetration rates, cutterhead torque requirements, TBM thrust requirements, machine...
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Performance of Raise Boring Machine (RBM) in Low to Moderately Hard Hornfels Rocks: A case Study of Efemcukuru Gold...
Abstract: Raise Boring Machine (RBM) provides a safe means of excavating a circular hole between two levels without the use of explosives. These machines were developed for the underground mining industry but nowadays is increasingly used on infrastructural projects. This paper aimed to assessment of the performance of a RBM during drilling / excavation of a ventilation shaft in the Efemcukuru Gold Mine,...
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