Comprehensive Evaluation of Ecological Environmental Quality in Small-Scale Coal Mining Subsidence Area Based on Hierarchical Structure—A Case Study of Shendong Coalfield in Western China

Abstract

Aiming at the problem that the current research is not suitable for the evaluation of the surface ecological environmental quality in a small-scale coal mining subsidence area, a model combining the hierarchical method and the weighted method was constructed to realize the comprehensive evaluation of the surface ecological environmental quality in a small-scale subsidence area. The results showed that the change in the water and soil environment caused by coal mining subsidence was the main factor affecting the quality of the ecological environment in the subsidence area; the evaluation results in the control area and uniform subsidence area were of grade III, which was at the “general” level, and the evaluation results in the non-uniform subsidence area were of grade VI, which was at the “poor” level. Coal mining subsidence has a great impact on the quality of ecological environment in a non-uniform subsidence area.