Determination of Geological-Geotechnical Parameters by Correlations in Bauxite Deposits

• DOI: https://doi.org/10.22533/at.ed.3174282419119

• Palavras-chave: Bauxite; Amazonia; Geology.

• Keywords: Bauxite; Amazonia; Geology.

• Abstract:

  Determining the strength parameters of materials in a consolidated manner can be achieved through field investigation and laboratory analysis. In mining projects, the need for a response is practically immediate, especially in tropical regions where soils of this nature are marked. In this way, the article sought to characterize the geological-geotechnical materials that make up the common plateaus in the Amazon region, which overlie the deposits and reserves of bauxite mines, providing an initial understanding (concept) of how these layers can be approached in mining activities. The aim was to correlate the geotechnical parameters of these materials, validated in the field through the authors' experience in projects of this nature. The methodology was based on understanding a stratigraphic profile typical of the Juruti (PA) region, where geological-geotechnical investigations were carried out and correlations for tropical soils were adopted for an 18 m profile, composed initially of a layer of organic soil, followed by a layer of clayey soil, with varying depths; this overlapped the bauxite deposit. In addition, based on field tests, the materials of the plateaus were parameterized for various uses such as: exploration and development of bauxite mines in the Amazon region in general, presenting cohesion and an angle of 30 kPa and 33°. The conclusion is that this parameterization could make operations more viable by defining and understanding the geotechnical behavior of these materials.