Análise da confiabilidade dos dados gerados em modelos geológicos da mina carvão Moatize, secção 2B

Abstract

This report was developed with the objective of evaluating the adherence of geological models applied to coal mining in the Moatize Carboniferous Basin, through a methodological approach structured in pre-field, field and post-field stages. Initially, an extensive bibliographical consultation was carried out to theoretically support the characterization of the region's coals. Next, the field work, carried out in the 875C mining concession, involved detailed geological mapping – with surveying the tops and bases of the coal layers and identification of structural features – and topographic monitoring of the blast holes, using technologies such as high- precision DGPS and geophysical profiling. In the office work phase, the collected data was integrated and analyzed using specialized software (Vulcan, QGIS and Excel), allowing the interpretation of stratigraphic profiles and the validation of existing geological models. The comparison between field measurements and model predictions revealed different levels of adherence (good, neutral and bad), showing that, although the model adequately reproduces certain characteristics, there are significant discrepancies in areas affected by faults and geological complexities. The results point to the need to improve data collection and integration methods, as well as the constant recalibration of models to mitigate uncertainties and reduce operational risks, waste of resources and excessive costs. Therefore, it is recommended to increase sampling density, incorporate data from multiple sources – such as high-resolution geophysics and remote sensing – and invest in 3D modeling technologies, aiming to increase the reliability and accuracy of geological predictions for safer and more efficient mineral exploration.