Evaluation of Open-Pit Mine Security Risk Based on FAHP-Extenics Matter-Element Model

Abstract

In order to timely find out the safety problems in the production process, in this study, we focused on the present safety situation of ChangShaoHao open-pit gold mine in Inner Mongolia and established the overall safety environment risk evaluation matter-element model based on the Fuzzy analytical hierarchy process (FAHP) and extenics theory. In addition, for the analysis, four criteria layer indexes, thirteen sub-criteria layer indexes, and thirty-one measure layer indexes were selected as the overall risk (target layer) evaluation object. The basic data were mainly acquired by the means of on-site investigation, data analysis of the engineering, expert questionnaire, etc., followed by calculating the correlation degree of the bottom indexes with respect to the four safety grades through the extenics theory, and combining with the index weight of other layers obtained by the FAHP method. Finally, the comprehensive evaluation result was worked out. The overall security level of the open-pit mine is II, indicating that the overall safety level of the open-pit mine is acceptable. Simultaneously, some serious risks on mine’s safety need to be observed. The evaluation result fitted under the practical situation of the engineering, providing a good decision-making basis for the safe production and management work of gold mine.