ANALYSIS OF THE DISPLACEMENT FIELD IN THE STABILITY OF HIGH-RISE MINING SLOPES / ANÁLISIS DEL CAMPO DE DESLOCAMIENTOS PARA ESTABILIDAD DE TALUD DE GRANDE ALTURA EN MINERACIÓN / ANÁLISE DO CAMPO DE DESLOCAMENTOS PARA ESTABILIDADE DE TALUDES DE GRANDE ALTURA EM MINERAÇÃO

AUTOR(ES)
DATA DE PUBLICAÇÃO

1999

RESUMO

The evaluation of the stability of the Robert Pit Mine (Canada) is made through the field of displacements of superficial and ground marks and possible rupture mechanisms obtained from the results of tension-deformation analysis by using the program computational FLAC (V. 3.30). Two constitutive models, the elastic perfectly plastic model and elastic-plastic with strain softening model, are used for the determination of safety s factor and plastification area. This work also defines the characteristics of cinematic behavior of the rock slope under gravitat ional condit ions. A sensibility study is realized considering shear stress and displacements in function of the variation of the rock parameters and of the inclination of the slope. The analysis of the factors associated to the definition of the rupture mechanisms in tension-deformation terms is also done. Finally, the comparisons are presented among safety s factors calculated in function of the results of the numerical analysis (FLAC) and safety s factors calculated by limit equilibrium methods in function of the potential rupture surfaces of the computational model.

ASSUNTO(S)

factor de seguridad mecanismo de ruptura estabilidad de taludes mecanismo de ruptura failure mechanism safety factor estabilidade de taludes rock slope stability fator de seguranca

ACESSO AO ARTIGO

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