Method for evaluating and selecting backfill material survey areas for mineral resources planning: A case study in Ba Ria - Vung Tau province

Abstract

This research focuses on developing a method to select priority survey areas to be included in the exploration, exploitation, and utilization plans for minerals used as common building materials in Ba Ria - Vung Tau province, in accordance with the Planning Law 21/2017/QH14. The main objective is to ensure efficient and sustainable exploitation, environmental protection, and compliance with the Mineral Resources Law. The research methodology uses weighted multi - criteria evaluation integrated with GIS to create a priority zoning map for surveying backfill materials - the type of common building material occupying the largest area in the province. Two sets of criteria are applied: (1) 10 exclusion criteria to identify areas where mineral activities are not permitted, and (2) 8 impact assessment criteria based on mineral quality, economic efficiency, social and environmental impacts. The research results identify 30,434 ha (16.09% of the study area) as potential areas for backfill material survey, while the remaining 83.91% is excluded. The priority zoning map is divided into 4 levels from low to high, synthesized from various database sources. This study provides a support tool for planners and managers in the initial selection of areas for exploration and exploitation of common building materials in Ba Ria - Vung Tau. However, the criteria need to be adjusted appropriately when applied in practice, based on the latest database and mineral exploitation status.