HENRY WILLIAM
CONTRERAS VASQUEZ



Strategic Mine Planning Engineer

Henry_contreras_img

Mining Engineer,Master Graduate in Rock Geomechanics, with specialization in Geostatistics. More than 12
years of work experience as a resource and reserve estimation engineer, Undreground and Open pit Planning Engineer,
Geomodeling and Geostatistics.

works carried out during the course of my experience.




Geo-Modeling and QA/QC Reports


Geological/geophysical modeling work in explicit and implicit techniques using Leapfrog software, Administration and validation of the DDH database, QA/QC analysis and reports:The image belongs to surface infill diamond drilling work towards underground operation areas, carried out before and after underground work; to recover the amount of mineral up to the surface by the sublevel stopping mining method.




Estimation and Geostatistics

Objectives achieved for short-term models: To sustain production over time, the reduction in copper quality (cutoff from 0.85% to 0.65%) and increase in production, lowering operating costs and fixed costs; A fundamental objective was to reduce the variability in the reconciliations of the Cu grades (of the concentrate with the insitu), to obtain an Optimal Insitu blending; making a recalculation of the meters/Linear of the exploratory drills, keeping the axes of the drills long.




open pit planning - Strategic Mine Planning (scoping-prefeasibility).

determination of the final Pit to different scenarios, Pit Shell to price sensitivity/fixed mining costs; determination of best and worst case, generation of pushback considering the amount of bench for each phase and mining widths, mining start zones and mining routing according to organizational strategies. (Payback/NPV), LOM at levels of amount of information (scoping-prefeasibility).





Underground Planning

Design of development work (Ramps,XC, Bypass, RB) Preparation work (VE, SN, Galleries) and stope mining; design the SLS system in Aegis software; sequencing planning , Monthly and weekly programs; Forecast and budget.