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It is very important to know the degree of disintegration beforehand in open quarry bench blasting in terms of blasting efficiency. Kuznetsov (1973), Cunningham (1987), andOuchterlony (2005) have developed the Rosin-Rammler distribution function for estimating the degrees of fragmentation (Rosin & Rammler, 1933). However, models they developed do not give realistic results for blast surfaces where there are a lot of discontinuity characteristics with broken and fissured areas due to the difference in structural characteristics of the rocks. In this study, average fragmentative distribution of the heap formed as a result of several blasting tests in a quarry belonging to BATIÇİM have been separately determined by using a dimensional analysis program with Wipfrag image processing technique and Kuz-Ram estimation model. Average granular size correction has been carried out with the approach of accepting as fine-grain the areas that couldn't be determined by means of image analysis programs and that were neglected in the analysis. Subsequently, the land coefficient in Kuz-Ram model was determined to be 0.0383 rather than 0.06 for the said quarry by taking the average dimension values determined by Wipfrag method as reference point.Keywords: average muck pile fragmentation, estimation muck pile fragmentation, blasting efficiency, Image processing technique Kluczowym zagadnieniem jest znajomość stopnia rozdrobnienia materiału przed przystąpieniem do prac strzałowych w kamieniołomach, dla określenia skuteczności strzelania. Kuznetsov (1973), Cunninghma (1987 i Ouchterlony (2005) wyprowadzili dystrybuantę bazującą na równaniu Rosina--Rammlera (1933) w celu estymacji stopnia rozdrobnienia materiału. Jednakże opracowane modele nie oddają rzeczywistych wyników gdy prace strzałowe prowadzone są na powierzchniach w których znajdują się liczne strefy nieciągłości, załamań oraz spękań wskutek różnic we właściwościach struktur skalnych. W pracy tej obliczono średnią wielkość fragmentów materiałów rozdrabnianych w trakcie trwania prac strzałowych w kamieniołomie należącym do przedsiębiorstwa BATICIM. Wielkości te zostały określone oddzielnie przy użyciu programu do analiz wymiarowych wykorzystującego techniki przetwarzania

<span>The aim of this study was to design a learning environment supported by a problem-based learning method and to obtain students' views on this process. In this context, the Database Management Systems course was taught according to the problem-based learning method. The participants of the study consisted of 25 students from the 2nd-grade students studying in the Department of Computer Education and Instructional Technology in the spring semester of 2015 at Uludag University Faculty of Education. The research design of this study was the case study, which is one of the qualitative research designs. Data were obtained from the students via a semi-structured interview form. Descriptive analysis was applied to the data obtained from the interview. According to the results obtained from the analysis of the data, the students were generally satisfied with the problem-based learning practices. In addition, the students emphasized that it is important to have a sufficient level of necessary knowledge of the implementation of problem-based learning to design the classroom environment.</span>

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TKI (Turkish Coal Enterprises) has been operating an open pit lignite mine since late 1970s in a town calledÇan which is situated in the north-west of Turkey. There is a ceramic factory, which is one of the biggest in Europe as far as capacity is concerned, operating very close to the lignite open pit mine. In 1999, a catastrophic earthquake demolished not only the cities and towns located on the Northern Anatolian fault zone but also triggered a landslide on the ceramic factory site benches of the Çan lignite open pit. The susceptibility of artificial slopes to failure during earthquakes is a wellknown event. This paper summarises geological, geomorphological and hydrological surveys of the area and the work done to define the slip surface by means of inclinometer surveys. Geotechnical parameters collected from all local geological formations were used later in the slope stability analysis. Details of the studies undertaken since the beginning of the landslide are given in this paper.