Study on Stability Evaluation of Goaf Based on AHP and EWM—Taking the Northern New District of Liaoyuan City as an Example

Abstract

This study evaluated the stability of the goaf in the northern new district of Xi'an District, Liaoyuan City, Jilin Province. Fourteen indicators were selected from three aspects: specifications of the goaf, ecological and geological environment, and mining conditions to make the evaluation of the stability of the goaf more comprehensive. Based on improved game theory, two weighting methods of AHP-EWM (Analytic Hierarchy Process and Entropy Weight Method), were used to calculate the weights, and finally, Mapgis and Arcgis was used to intuitively understand the ground stability of the study area. According to the threshold value, the stability of the study area was divided into three types: stable, basically stable, and unstable, and the results show that the stability of the study area is generally at the lower middle level. The stability grading of the goaf in the northern new area provides a scientific basis for establishing reasonable urban planning in the future and protects people's lives and properties more effectively.