Modelling the risk factors of occupational accidents in an underground coal mine in Turkey using regression analysis

The file is a zipped PDF document.Temporal and other factors contributing to the occurrence of occupational accidents at an underground coal mine in Turkey between the years 1992 to 2000 have been analyzed. Occupational accidents in mines result in both loss of time and money, and can cause debilitating injury or death and intense hardship imposed on family, friends, and dependents, for which no amount of compensation is sufficient. Thus, occupational accidents should be analyzed carefully in order to prevent future occurrences.The purpose of the study was to determine which, if any, of the factors studied contributed to the occurrence of accidents so that the mine could take the necessary steps to reduce the risk to the workforce. Regression analysis was used to determine the strength of the relationship between each factor studied and the number of occupational accidents.Accident reports written between 1992 and 2000 were collected and classified according to the cause of the accident. The number of accidents that occurred in each category was then recorded. There are many factors that contribute to the risk of an accident in an underground mine. The present study considered the following factors: mining system; type of shift; day of week; month of year; age of employee; total yearly production; total yearly labour; and total coal production in a year in tons of coal. The qualitative variables among these factors (mining system, type of shift, day of week, month of year, and age of employee) were quantified using relative scales, starting from one. Risk can be viewed as the probability of an accident’s occurrence, whereas the number of accidents in each category was divided by the number of workers working in the corresponding range. As a result of this operation, the rate of each accident was achieved (i.e. risk of each accident). These numbers were then graphed according to the factors contributing to the occurrence of accidents in order to decide whether to use a linear or polynomial regression model; polynomial regression was used with all the variables. The effects of the day of week, age, and month of year on the rate of accdents were considerably high; however, the effects of total yearly production, type of shift, and total yearly labour were very low. Total production and total labour were expected to be very influential on the rate of accidents. This was not reflected in the regression models because they do not include the effects of the mining system. Prior to 1997, hand-worked mining methods were used. Since then, both the mechanized mining methods and hand-worked mining methods are used in production. Therefore, the type of mining system was considered along with total production and total labour. Polynomial regression was used to determine the effects of these factors. As a result, total labour was found to be a factor on the rate of accidents, whereas total production did not have considerable influence.In conclusion, day of week, age of employee, total labour, and month of the year were found to be the most influential factors. Considering these factors, some recommendations were made for the mine schedule. If precautions are taken, it is believed that risk of the occurrence of occupational accidents in the mine would decrease substantially.
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Summary: The file is a zipped PDF document.Destress blasting or preconditioning, a rockburst control measure, has been tried to control strainbursts since the beginning of the 20th century. The concept of destress blasting evolved from the observation that the zone of highly fractured rock immediately surrounding some deep underground openings seems to offer some shielding to both the occurrence of and damage from rockbursts. It was argued that extending and maintaining this zone of the fractured rock...
Publication: CIM Bulletin
Author(s): H.S. Mitri, M.R. Saharan
Issue: 1091
Volume: 1
Year: 2006
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Summary: The file is a zipped PDF document.Real options valuation is an alternative net present value framework that is able to incorporate both management flexibility and dynamic project risks. In this paper, management is considering the development of a satellite low-grade zone while operations in a developed high-grade zone continue. If the low-grade zone is developed prior to high-grade zone exhaustion, mine capacity must be expanded before additional production from the low-grade zone can be...
Publication: CIM Bulletin
Author(s): M.R. Samis, D.G. Laughton, R. Poulin
Issue: 1091
Volume: 1
Year: 2006
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Summary: The file is a zipped PDF document.The environmental management of mining operations has evolved considerably over the last two decades. Factors such as changing values of modern societies, globalization of trade, climate change, and regulations oriented towards sustainability have led to the introduction of environmental management systems (EMSs).Cambior is a medium-size gold mining company, incorporated in 1986. A rapid growth in its northwestern Quebec-based operations and its geographical...
Publication: CIM Bulletin
Author(s): S. Vézina
Issue: 1091
Volume: 1
Year: 2006
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Summary: The file is a zipped PDF document.The importance of blasting to mill operations has been discussed in a series of publications, especially in the last decade. Literature suggests that there are two types of benefits from finer blast fragmentation: productivity increases and decreased energy requirements at the mill. Productivity increases have been linked to fragmentation improvements while energy requirements in the mill can be expected if the work index changes with blasting.In the present...
Publication: CIM Bulletin
Author(s): P.D. Katsabanis, S. Gregersen, G. Kunzel, M. Pollanen, C. Pelley, S. Kelebek
Issue: 1091
Volume: 1
Year: 2006
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Summary: The file is a zipped PDF document.IntroductionThis paper describes a novel software application that has the capability to autonomously capture images of blasted rock material and analyze them to generate the particle size distribution. The system can also process a batch of rock images captured during a fixed duration of time and produce the overall particle size distribution. The new method has different layers of segmentation modules, which allows the system to respond to a wide range of...
Publication: CIM Bulletin
Author(s): G.K. Mann
Issue: 1091
Volume: 1
Year: 2006
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Summary: The file is a zipped PDF document.Extremely fine free gold was originally discovered on the surface of carbon fines within the carbon fines settling hopper at Omai Gold Mine Ltd. (OGML). This discovery prompted an intensive metallurgical investigation to determine the genesis of this gold and how to control it so as to prevent fine gold losses to carbon fines and tailings. The initial scope of work involved an extensive carbon handling circuit sampling campaign for the purpose of defining the...
Publication: CIM Bulletin
Author(s): G.A. Vickell, C. Taschereau, A.R. Laplante
Issue: 1091
Volume: 1
Year: 2006
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