Hakan Basarir

Hakan Basarir
Norwegian University of Science and Technology | NTNU · Faculty of Engineering Science and Technology

PhD

About

64
Publications
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1,093
Citations

Publications

Publications (64)
Conference Paper
Full-text available
Due to recent technological advancements drilling operations conducted for different purposes such as exploration, blasting and even grouting are not considered as auxiliary operations any longer. On the contrary, nowadays onsite drilling operations are considered as important resources for getting more information about rock properties. Many resea...
Article
This paper presents the results of performance analysis on the support systems recommended by the RMR (rock mass rating) rock mass classification system. Rock–support interaction is analyzed by means of both numerical and multiple regression modeling. Five different rock mass conditions were assumed from very poor to very good, each representing va...
Article
The effect of opening size, rock properties and stress conditions on the radial displacements ahead and behind of the advancing face of a circular opening is one of the most important topics in civil and mining engineering. In this paper we develop a prediction system for radial displacements around the face of an opening by combining rock mass rat...
Article
The objective of this paper is to predict the stresses around the tail and main gates of Soma Eynez underground coal mine, located in Western part of Turkey. In the studied mine, the magnitude and the direction of stresses around the gateways frequently change due to a planned mining method, which is a combination of a fully mechanized traditional...
Article
Full-text available
In many mining engineering applications such as prospecting, development, production and grouting, diamond bit drilling is widely used due to high penetration rate, core recovery and its ability to drill with less deviation. It has been well known that the operational parameters of diamond bit drilling are closely related with rock mass strength pr...
Conference Paper
Full-text available
While there are already many methods for the design of tunnels, these methods are being improved with technology and experience or new ones are added to the literature. In this study; The quality of rock masses were assessed using Rock Mass Quality Rating (RMQR) along 2540 m long Honaz tunnel excavated in weak rock masses. Support systems were desi...
Article
The parameters that influence slope stability and their criteria of failure are fairly understood but over-conservative design approaches are often preferred, which can result in excessive overburden removal that may jeopardize profitability in the context of open pit mining. Numerical methods such as finite element and discrete element modelling a...
Article
Full-text available
To ensure ultra-high performance, in terms strength and durability, coarse aggregate is typically avoided in UHPC (ultra-high performance concrete). Instead, very fine quartz sand is usually used as the only aggregate. However, excessive extraction of sand from natural resources and its grinding and refining processes to prepare very fine quartz-ri...
Article
Full-text available
Ultra-high-performance concrete (UHPC) is a recent class of concrete with improved durability, rheological and mechanical and durability properties compared to traditional concrete. The production cost of UHPC is considerably high due to a large amount of cement used, and also the high price of other required constituents such as quartz powder, sil...
Article
The aim of this paper is to propose a closed-form solution to the poromechanics problem of stress and pore pressure distribution around noncircular openings at great depth subjected to hydrostatic water pressure and far-field geostresses. The problem is solved by superposing the effects of fluid and solid skeleton obtained over simple circular geom...
Article
Lining is gaining acceptance in underground excavations because of its reinforcing and protecting capacities. The purpose of this paper was to derive an analytic expression based on the complex variable method to describe the behaviour of a tunnel with a liner of finite thickness. The stress functions have been expressed as Laurent series where the...
Article
In order to achieve a successful cemented paste backfill (CPB) mixture design, multiple project requirements such as strength, flowability and cost should be met. For this achievement, the key design parameters, solid content (SD) and cement percentage (C), should be well adjusted. With increasing the amount of cement in the mixture, CPB strength a...
Chapter
Cemented hydraulic backfill (CHB) is widely used in underground mine backfilling, especially when regional stability is required. One of the critical backfill properties is uniaxial compressive strength (UCS), the maximum axial compressive stress that the sample can withstand before failing. CHB is expected to have a certain UCS in a specific time...
Article
Full-text available
Existing models on the stress distribution around deep buried tunnels pay little attention to the impact of rock-liner interaction and seepage variation. The conventional solution for deep lined tunnels has an inherent mathematical restriction since it is limited to thin liners. In this paper, we solve the poro-mechanical problem of stress and pore...
Article
Full-text available
Cement-based grouting has been widely used in underground coal mining to improve the overall quality of highly fractured rock masses. Due to the difficulties in obtaining characteristic specimens from highly fractured coal rocks, there are very limited laboratory studies investigating the effect of grout on the strength of coal. The purpose of this...
Article
High-performance concrete (HPC) is a class of concretes that may contain more cementitious materials other than portland cement, such as fly ash and blast furnace slag, in addition to chemical admixtures, e.g., plasticizers. Strength, durability, and rheological properties of the normal concrete are enhanced in HPC. The compressive strength of HPC...
Article
Full-text available
In this study, different modelling techniques such as multiple regression and adaptive neuro-fuzzy inference system (ANFIS) are used for predicting the ultimate pure bending of concrete-filled steel tubes (CFTs). The behaviour of CFT under pure bending is complex and highly nonlinear; therefore, forward modelling techniques can have considerable li...
Article
Full-text available
In this paper, we focus on the energy alteration during longwall mining in an attempt to mimic the conditions of a coal mine in Western Turkey. We verify the proposed model using existing analytical and numerical solutions in terms of stress components. Based on the verified numerical model, the energy balance during longwall retreat is studied rig...
Article
Full-text available
The purpose of this paper is to describe the nonlinear behaviour of geomaterials within the principles of thermodynamics. The main components of this contribution are (1) a new method to estimate the properties of minerals subjected to the non-hydrostatic compression in diamond anvil cell using the finite strain theory is introduced and (2) a prope...
Article
Full-text available
Continuous monitoring of mechanical parameters determining the state of natural and man-made systems is essential in a wide range of engineering disciplines from mechanical to civil and geotechnical engineering. To be effective, the monitoring response time needs to be commensurate with the characteristic time of variation of the processes being mo...
Conference Paper
This paper investigates the effect of rock mass alteration on the initiation and propagation of fractures. Mining-induced fractures influence the stability of overburden and may provide pathways for mass transfer in underground environments. However, the usefulness of existing fracture modeling techniques with discrete element methods and tradition...
Article
Due to the susceptibility of concrete structures to severe damage under earthquake loading, an increasing demand on high-strength and high performance concrete materials has been arising recently. Among several new materials, carbon nanotubes (CNTs) with their superior mechanical properties are being widely used in construction industry. In this st...
Article
A recent paper by the authors showed that the innovative technique of CFRP repair of severely corroded steel circular pipes is promising. This paper presents further experimental results for two series of CFRP strengthened and rehabilitated pipes under quasi-static large deformation 3-point bending and direct indentation. The main parameters examin...
Article
In this paper, the development of the models for the prediction of rock mass P wave velocity is presented. For model development, the database of 53 cases including widely used and recorded drilling parameters and P wave velocity was constructed from the field studies conducted in 13 open pit lignite mines. Both conventional linear, non-linear mult...
Article
The behaviour of Carbon Fibre Reinforced Polymers (CFRP) reinforced mild steel isolated plate (strut) under uniform axial compression is not well understood because there is a lack of experimental research. This paper presents experimental results for a series of struts reinforced with CFRP sheets subjected to uniform axial compression. The main pa...
Article
This paper investigates the non-linear behaviour of geo-materials both in the reversible and irreversible thermodynamic regimes. Among the common Seth-Hill measures of deformation, we verify that the logarithmic (Hencky) strain produces the closest agreement with Diamond Anvill Cell experimental data obtained for a wide range of minerals. We extend...
Article
Building sustainable green cities for the future can be difficult or highly challenging as such cities need to reduce their environmental footprint through eco-friendly materials, resource and energy conservation, as well as renewable energy generation. A recent paper by the first author has proposed sustainable concrete with 80% ground granulated...
Conference Paper
Full-text available
The Rock Mass Rating (RMR) classification system is widely used to design support systems for underground openings. For underground openings, excavated in the same quality rock mass, the system proposes the same support system independent from the depth of the opening. This study theoretically analyses the performance of RMR proposed support for op...
Conference Paper
The strength and deformability properties of rock mass are required in many mining and civil engineering projects.As rock masses have a complex and uncertain nature, to deal with such complexity the use of probabilistic approaches seems to be more appropriate than the use of conventional deterministic approaches. In this paper, a recently presented...
Article
Full-text available
RMR sınıflama sistemi yeraltı açıklıklarının tahkimat tasarımında yaygınlıkla kullanılmaktadır. Sistem aynı kalite kaya kütlesinde farklı derinliklerde oluşturulacak açıklıklar için herhangi bir fark gözetmeksizin aynı tahkimat sistemi önerisinde bulunmaktadır. Bu çalışmanın amacı varsayılan farklı gerilme koşulları altında aynı kalitede kaya kütle...
Conference Paper
Full-text available
RMR sınıflama sistemi yeraltı açıklıklarının tahkimat tasarımında yaygınlıkla kullanılmaktadır. Sistem aynı kalite kaya kütlesinde farklı derinliklerde oluşturulacak açıklıklar için herhangi bir fark gözetmeksizin aynı tahkimat sistemi önerisinde bulunmaktadır. Bu çalışmanın amacı varsayılan farklı gerilme koşullar altında aynı kalitede kaya kütles...
Conference Paper
Full-text available
Open pit slope stability is a major concern in any mine prefeasibility study. Most widely used numerical and limit equilibrium methods require two inputs: rock mass mechanical parameters and bedding geometry of lithological units. Traditionally, rough geological models prepared by time consuming explicit method of manual digitization or assumptions...
Conference Paper
Full-text available
With an increase in the overall slope height of open pit mines, stability analysis and amount of stripping waste rock becomes progressively difficult. It is necessary to optimize the overall slope angle by increasing it as much as possible with ensuring the mining safety. After comprehensive geotechnical investigation and rock mechanical laboratory...
Article
Full-text available
Numerical modeling techniques have been applied in many mining and civil engineering projects. Traditionally, deterministic methods have been used frequently for the estimation of design or input parameters for numerical modeling. Whereas, it is known that the effect of variability and uncertainty sourced from the complex and variable nature of roc...
Article
To assess the stability of slopes, mining and geotechnical engineers frequently use empirical rock mass classification and characterisation systems. These methods are practical and often very useful in the preliminary design stage. Slope mass rating (SMR) system is one of the commonly used empirical methods to assess the stability of slopes. The SM...
Article
Impact type excavators are widely used for excavations, performed in weak-laminated-foliated-anisotropic rocks. Therefore the prediction of the performance of impact hammer is very important in many mining and civil engineering projects.This paper describes the construction of adaptive neuro-fuzzy inference system model for predicting the performan...
Article
The major borax producer, Eti Mining Co. of Turkey, planned to construct an export stock site located near the Bandirma Harbor in the northwestern of Turkey. During this construction, some stability problems were encountered. To analyze the stability problems and to assess the engineering properties of soil in the stock site geotechnical investigat...
Article
The paper reports an assessment of the engineering geological characteristics of the rock mass to be encountered between Mecidiye and Gazino stations on the new extension of the Ankara metro and the determination of appropriate support and excavation methods. The rock mass quality was estimated using the rock mass rating (RMR), geological strength...
Article
Specific energy is simply defined as the work done per unit volume of rock excavated. Specific energy is an important performance parameter as it relates cutting force to the amount of rock excavated. In this paper the development of a new rippability classification system for coal measure rock based on specific energy is presented. Extensive field...
Article
Due to environmental constraints and limitations on blasting, ripping as a ground loosening and breaking method has become more popular than drilling and blasting method in both mining and civil engineering applications. The best way of estimating the rippability of rocks is to conduct direct ripping runs in the field. However, it is not possible t...
Article
Due to the environmental constraints and the limitations on blasting, ripping as a ground loosening and breaking method has become more popular in both mining and civil engineering applications. Because of the technological advances in dozer manufacturing techniques, more powerful dozer types are available today. Thus, the ground, previously classi...
Article
Full-text available
This paper discusses the engineering geological investigations, diversion tunnel support design and slope stability assessment studies carried out at the Sulakyurt dam site, northeast of Ankara, Turkey. The Sulakyurt dam will be used for flood flow control and water storage for irrigation. Engineering geological mapping, discontinuity surveys, core...
Article
This paper presents the results of engineering geological studies of the rock masses along a road tunnel. Rock mass qualities of the rock units along the tunnel were determined by means of Rock Mass Rating (RMR), Geomechanic Classification (Q) system, Geological Strength Index (GSI), Rock Mass Index (RMi) and New Australian Tunneling Method (NATM)....
Article
Full-text available
The paper presents the geotechnical properties along the route of the 9,325m twin tunnel metro route in the Greater Municipality of Ankara. Convergence measurements taken during tunnel construction are presented and discussed. In addition, the convergence of the twin metro tunnels was analysed by means of a 2D plane strain finite element (FE) analy...
Article
This paper presents the results of engineering geological investigations and tunnel support design studies, carried out at the Sulakyurt dam site, northeast of Ankara, Turkey. The Sulakyurt dam will be used for flow control and water storage for irrigation projects. Studies were carried out both in the field and the laboratory. Field studies includ...
Conference Paper
Full-text available
The purpose of this paper is to assess the engineering geological characteristics of rock mass and to recommend appropriate support for a tunnel section between Kuyubasi and Dutluk stations in the Kecioren metro line. The Kecioren metro line is part of the Ankara subway tunnel project, planned by the Greater Municipality of Ankara, Turkey. Laborato...
Article
Engineering geological properties and support design of a planned diversion tunnel at Guledar dam site, which was located at the North of Ankara, Turkey were studied in this article. The main purpose of the construction of the planned tunnel is to regulate, drainage and to provide water for irrigation purposes. The diversion tunnel runs mainly thro...
Article
Full-text available
This paper describes the development of a rippability classification system for marls in lignites mines based on direct ripping runs, specific energy concept and indirect rippability assessment methods. Extensive field and laboratory studies were undertaken in six different panels of Turkish Coal Enterprises and Sivas-Kangal Lignite mines. Rock mas...
Article
This paper presents the results of the support capacity estimation for the diversion tunnel of the Uruş dam site in highly weathered tuff and weak zone. Tunneling in weak rock requires some special considerations, since misjudgment in support design results in costly failures. There are several ways of estimating rock support pressure and selecting...

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Projects (3)
Project
Traditionally, a concrete mixture is designed in a laboratory by preparing trial batches to meet the design requirements. This method suffers from exponential increases in the required number of samples and experiments when many mixture objectives (UCS, cost, permeability, density, etc.) need to be optimized or many influencing variables, such as water-to-cement ratio, different types of fine and coarse aggregates, superplasticizer, and a variety of supplementary cementitious materials, are considered in the optimization. Furthermore, the variability of the curing environment (humidity and temperature) and constituent properties (the size and shape of aggregate and type of cementitious materials) may incur marginal differences in concrete performance even with the same mixture proportion. Concrete mixture optimization is motivated by an ever-increasing need for designers to create concrete mixtures that satisfy multiple – oftentimes competing – performance requirements, including cost, physical properties, mechanical properties, etc. Satisfying multiple competing objectives with a large number of influencing variables is time-consuming and costly, or even impossible using laboratory-based experiments. Hence, machine learning models and optimization algorithms can be applied to address this problem. The complex relationship between concrete properties and its components can be accurately constructed by machine learning models. Meanwhile, the optimization algorithms can search for optimal component combinations to achieve the best performance of concrete. The purpose of this Special Issue is to publish original research and review articles that cover various aspects of the design and optimization of concrete mixtures using machine learning approaches. Research that considers many-objective mixture optimization for multi-functional concrete is particularly welcome. Potential topics include but are not limited to the following: Modelling concrete properties as a function of its components using advanced machine learning techniques, including data pre-processing, regression, classification, clustering, dimensionality reduction, ensemble methods, and deep learning Improving the generalizability of existing machine learning models using large-scale data of construction and building materials Designing intelligent systems incorporating machine learning algorithms for automatic real-world design of concrete materials Optimizing many objectives of concrete, such as strength, cost, slump, density, etc. using machine learning and optimization algorithms (such as metaheuristic algorithm) Developing new machine learning algorithms and metaheuristic algorithms for concrete mixture design Discovering new cementitious materials using machine learning techniques
Project
Triggered by the emergence of new technologies such as automation, smart equipment and the wide application of mobile technologies, a huge amount of data is being generated in civil engineering. This brings about challenges - such as how to analyze this data - as well as opportunities for governments, organizations, communities and individuals to utilize this data. Thus, this has led to the emergence of a completely different paradigm for decision making. Data mining has been widely used in civil engineering, making it a hot research topic due to its importance. For example, data mining techniques such as regression and classification have been used to analyze landslide susceptibility, suspended sediment load modelling, accident severity prediction and concrete property estimation. Data mining can support decision-making and provide new insights for civil engineers, which inevitably involves experts from both data analytics and specialized civil engineering. The aim of this Special Issue is to collect state-of-the-art research findings on the latest developments and challenges in the field of data mining for civil engineering. High-quality original research papers that present theoretical frameworks, methodologies, and application case studies from a single- or cross-country perspective are welcome, as well as review articles. The Call for Papers for this Special Issue has now been posted on the journal's website at http://www.hindawi.com/journals/ACE/si/646837/cfp/.
Project
The overall aim of this special issue is to collect state-of-the-art research findings on the latest developments, up-to-date issues, challenges and solutions in the field of mitigating the impacts of mining. The 'Call for Papers' can be found through https://www.springer.com/materials/journal/12613, as well as from the project log.