جستجوی مقالات مرتبط با کلیدواژه « Open Pit Mines » در نشریات گروه « پزشکی »

The inherent and unique risks of mining projects quite often present key challenges that health and safety risks are among the most significant risks in mining projects since the mining industry is characterized by a relatively high injury and death rate compared to other industries. Various factors including human, environmental, machinery and tools affect mining safety that the role of human factor is significant at different levels and based on it, it is necessary to assess the risks associated with human factors separately. In mining project management, safety risk assessment is an important step toward identifying potential hazards and evaluating the risks associated with the hazards. Proper safety risk prioritization is very crucial during the risk assessment for planning, budgeting and managing safety-related risks. Despite the importance of the risk assessment, in many Iranian mines, some of which include large mines, there is a lack of appropriate and scientific approach to the issue.

In the present paper, we have tried to examine the application of Analytical Hierarchy Process (AHP) as a quantitative method for risk assessment with a special focus on the open pit mining industry. The identification and classification of risk assessment is based on the Human Factors Analysis and Classification System (HFACS) model. Then, the analysis is performed by collecting experts grading to determine the weights of important accident-causing factors at various levels of a working system in open pit mines.

The weight of human factor indices has been evaluated at four levels. At different levels, organizational atmosphere factors, improper performance of fault correction, resource management and decision error have been identified as the most significant factors leading to human accidents in open pit mines.

By using AHP method, the role and importance of various factors affecting safety in open pit mines at different levels of managerial and organizational factors, supervisory and leadership factors, preventive factors and executive factors have been investigated. This analysis can play a decisive role in the field of establishment and optimization of the safety management system, including formulation of policies, organization, planning, evaluation and implementation of activities in a safe manner.

Several work related accidents occur in Open pit mines annually, resulting in permanent disability and death. The present study was designed to develop a measurement tool for assessment of incidents reported in Open Pit metal mines according to rules and regulations.

In this research, we first studied 200 cases of work-related accidents in the years 2009-2016, in order to provide the basic foundations for the formulation of the necessary elements for the structures of this questionnaire. The questionnaire was first designed with four structures, 13 dimensions and 81 questions. To assess the validity of the questionnaire, the formal, content, and structure validity of the questionnaire was used to determine the reliability of the two methods of internal consistency (Crohn’s Alpha) and test-retest using the coefficient of intratrail. Provided questionnaire was distributed among 377 employees of metal open-pit mines workers of Yazd and Kerman city. Data were analyzed through SPSS and LISREL software. Ethical considerations in this study were adhered based on the Helsinki guidelines.

The content validity of 22 items was eliminated and by calculating construct validity, a questionnaire with four constraints of violation of rules and regulations, unsafe operator behaviors, unsafe conditions of equipment and environmental unsafe conditions that has a reliability equal to 0.842, and the elements of the questionnaire has content validity. The scout study Cronbach’s alpha coefficient and KMO in the main study was 0.842 and 0.708 subsequently. Questionnaire items also have content validity (CVI = 0.84). The questionnaire data will only be used for analysis and will not be used elsewhere.

This questionnaire is an appropriate native tool with the approach of local role and regulations for assessing work-related accidents in open-pit metal mines

Regarding development of several thermal indices and limitations of these indexes, in this research we were examined the applicability and validity of Modified discomfort index (MDI) in Outdoor occupational environments.
This cross-sectional study was done on 175 subjects in summer (2016) in 12 mines construction materials of Tehran Province. Environmental and Physiological parameters (oral temperature, tympanic temperature and skin temperature) were measured simultaneously at three periods; also Modified discomfort index (MDI) together with three other Direct Indices include Wet-bulb globe temperature (WBGT), Oxford index (WD) and Wet-bulb dry temperature (WBDT) were calculated. For survey of applicability and validity of Modified discomfort index, the correlation between this index and other Direct Indices at different times of day with Physiological parameters was determined through the Pearson correlation coefficient.
The results showed that MDI index had more correlation with environmental parameters (dry bulb temperature and relative humidity), also very high correlation coefficient with wet-bulb temperature and black-globe temperature. Among the thermal indices used in this study, MDI index had more correlation coefficient with three other indices. On the other hand; MDI had the highest correlation coefficient with oral temperature and the higher correlation with the tympanic and skin temperature after the WBGT index. In all cases, there was a very good correlation between MDI and other indicators at different times of day.
It can be concluded that MDI, despite being simple, lack of need for sophisticated equipment to measure, having a high correlation with physiological parameters, low cost and easy interpretation can be used as substitute for the WBGT index in the range of temperature and humidity study.