Abstract:
Introduction Based on the field survey data of mine geological environment in Guangzhou and the analysis of remote sensing interpretation results, taking into account the characteristics of mineral resources types and their relatively single mining methods,the evaluation system is constructed by selecting 12 indexes from five aspects, i.e. the degree of difficulty of landform and landscape destruction and control engineering, occupation and destruction of land, geological disasters, water and soil environmental impact, and geological environmental conditions.
Method We used the expert- analytic hierarchy process (AHP) method to determine the weight of the index, and the comprehensive evaluation method to establish the geological environment impact assessment model, combined with the GIS platform and spatial analysis technology to carry out the geological environment impact assessment of mines in Guangzhou.
Result The results show that the study area and its influence range are divided into 106 affected areas, of which 36 are seriously affected, involving 91 mines; 52 are relatively serious impact areas, involving 105 mines; 18 are comparatively mild impact areas, involving 121 mines. It is suggested that 36 areas with serious impact on mine geological environment shall be listed as key control areas of mine geological environment.
Conclusion The evaluation results are consistent with the field survey results, in order to provide a theoretical basis for the treatment and restoration of mine geological environment in the study area, and also provide a reference for the comprehensive evaluation of mine geological environment in similar areas.