Banca de QUALIFICAÇÃO: JULIANA ESTER MARTINS MOURA

Uma banca de QUALIFICAÇÃO de MESTRADO foi cadastrada pelo programa.
STUDENT : JULIANA ESTER MARTINS MOURA
DATE: 26/09/2023
TIME: 09:00
LOCAL: Microsoft Teams
TITLE:

GEOTECHNICAL TECHNOLOGICAL CONTROL OF A PILE EXECUTED WITH IRON ORE TAILINGS - BEHAVIORAL FORECAST X SERVICE PERFORMANCE

KEY WORDS:

Tailings, Stacking, Operational guideline, Tests, Geotechnics.

PAGES: 50
BIG AREA: Engenharias
AREA: Engenharia de Minas
SUBÁREA: Lavra
SPECIALTY: Lavra a Céu Aberto
SUMMARY:

After the disasters involving tailings dams worldwide, tailings stacking has been increasingly implemented as a replacement for this disposal method. This is still a topic with little standardization concerning its construction (operational guidelines) and acceptable geometries. Based on this, design criteria, acceptable moisture, and compaction levels must be established according to the characteristics of each tailings, which vary based on the geological area in which the mine is located. With a view to an acceptable design of a tailings pile at an iron mine in the state of Minas Gerais, Brazil, this research will analyze the geotechnical investigations carried out in the test landfill area, which has approximately 20.00 meters of stacking height under two distinct operational guidelines in an area of approximately 180.000 m². The first guideline with a minimum compaction level of 95%, moisture deviation of ±2, and compaction equipment being a track-type tractor (D10). The second guideline with a minimum compaction level of 98%, moisture deviation of ±2, and compaction equipment being a sheep's foot roller. The analyzed data will include technological controls of compaction and moisture during the operation of the structure, 14 CPTu tests (9 executed under the first guideline and 5 under the second guideline), 10 SPT tests, 3 inspection wells for deformed (characterization) and undeformed (special tests) samples, and 2 Denison type samples. These results will enable the evaluation of the efficiency of the executed operational guidelines. In general, it is expected that the results obtained from tip resistance in the CPTu test will directly interfere with the preliminary classification of liquefaction susceptibility, and construction criteria such as compaction, moisture, and equipment are essential to ensure higher values in the coefficients obtained from these tests. With this data, the CPTu information will be processed using the methodologies of Robertson (2016) and Olson (2001), correlated with SPT tests, basic characterization, and special tests performed based on equivalent operational guidelines.

COMMITTEE MEMBERS:
Presidente - THIAGO BOMJARDIM PORTO
Interno - MARIO GUIMARAES JUNIOR
Externo à Instituição - MARCUS VINÍCIUS LIMA DIAS - Unisinos
Externo à Instituição - FELIPE DE MORAES RUSSO
Externa à Instituição - ANGELICA DOS SANTOS SILVA
Externa à Instituição - ANDRÉA MÍRIAN COSTA PORTES