تحلیل سلسله مراتبی

In recent decades, due to population growth and necessity of food and job production, special attention has been given to the expansion and development of agriculture and the construction of several industrial zones in the vicinity of large and populous cities. On the other hand, because of the decrease in precipitations and deficiency in surface water resources, groundwater resources have been extracted through drilling wells in order to supply agricultural and industrial water. In Isfahan-Borkhar Plain, the number of deep and semi-deep wells has increased from a few hundred to more than 6,000 wells over the past forty years. This has led to a drop in water level with an annual average of about one meter. The continuous drop in groundwater level in susceptible areas had led to land subsidence. In this research, the amount of subsidence occurred in Isfahan-Borkhar Plain during the years 2014 to 2017 was determined by using Radar images and the factors affecting subsidence and the impact of each of them on the amount of subsidence was investigated. Furthermore, a combination of Analytical Hierarchy Process (AHP) with fuzzy logic in GIS environment and Multiple Linear Regression models was used to create Land Subsidence potential map of the area. Comparison of the results obtained from the Analytical Hierarchy Process and the linear regression method shows the greater efficiency of the linear regression method in calculating the subsidence potential.

In each project, there is always a possibility of occurrence of hazards and risks. Accidents cause many damages such as financial and psychological problems, that may have a negative effect on the workers life. To prevent or reduce the occurrence of incidents, it is necessary to identify and manage the relevant affecting factors. Blasting is one of the events that has frequently led to accidents. In this paper, 13 factors affecting the occurrence of blasting related accidents in the mining and construction projects, have been selected according to the opinion of experts and ranked to identify the most important one. For this purpose, Monte Carlo simulation method and analytical hierarchy process method were implemented. The factors were ranked based on the opinion of 15 experts in this field. Finally, based on the obtained results, inappropriate blasting time, unprofessional personnel were selected as the most important factors. Also, blasting pattern specifications, type of explosive and rock mass characteristics have the least effect in this regard. Validity of the paper outcomes was checked with comparing the real recorded events.