Stereographic analysis of Moore phase 6 in the Pueblo Viejo deposit

Abstract

The objectives that guided this study were, as a general objective:

a) analyze the stereographic projections of phase 6 of Moore at the old town site. (b) as specific objectives: determine the characteristics of the rock mass using the mapping detailed in mining fronts. Describing the geomechanical properties of the rock mass through logging of drilling Determine the orientation of the structural pattern through stereographic projections. Systematically organized structural data base to compare the types of structural information. It was introduced a methodology for updating the structural and geotechnical assumptions used during the feasibility phase, dating back to 2008. The work consisted of three months for the formulation and implementation of this methodology. A format that allows you to collect data of the Rocky massif, structural sets, identification of mechanisms of failure and the geometry of the undermined banks was elaborated. This format is an integral part of the process of updating the structu- ral databases and geomechanical parameters of rock mass. Although limited to MO6 and VKSI, the results: They allow to establish relations between the structural sets, the bank face angle and the orientation of the banks. Establish relationships between the geomechanical score and the bank face angle. Predict the future behavior of mined banks in these materials. It was determined that the characteristics and / or properties of the rock massif in the mining and deep fronts, is a finely stratified sedimentary unit, which preserves poor geomechanical values in the upper meters due to high surface weathering; resulting in low hardness, and with improved geomechanical conditions at depth. The structural pattern that predominates in the phase follows a reference to the NO and SE, with main structural sets perpendicular to the stratification and orthogonal to each other. It is recommended to include other lithological units and other phases of Moore. With the observations collected regarding the bank"s response to mining, it is possible to establish correlations of the structural sets with blasting processes and their optimization

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