Safety Evaluation of Blasting Flyrock Risk with FTA Method

摘要

Accidents caused by flyrock are commonly faced problems of blasting. These accidents usually have detrimental effects on people and equipments in form of injury, disability or fatality, equipment breakdowns, etc. However, the evaluation of the flyrock accidents is always based on experiences, which varies from person to person. In this study, the fault tree analysis (FTA) method is proposed as a tool to analyze the risk associated with blasting flyrock. The flyrock accident is considered as a combination of events and relations components, and the fault trees are established to delineate the interrelationships of these components. Using the minimum cut set technique, the most critical and vulnerable component in the flyrock accident is identified. It is found that strengthening the operation supervision is the most effective measure to prevent the flyrock accident in blasting.