Man

JAVIER ANDRES VALLEJOS MASSA

academic

university of chile

las condes, Chile

Líneas de Investigación


Development of stability studies in the mining and rock engineering design. Specialist in geotechnical characterization, stability of slopes and excavations in rock and soil, monitoring instrumentation, mining sequence and mining methods.

Educación

  •  mining engineering, QUEEN'S UNIVERSITY AT KINGSTON. Canada, 2010
  •  Geotechnical Engineering , UNIVERSIDAD DE CHILE. Chile, 2005
  •  Civil Engineering,Structures and Construction , UNIVERSIDAD DE CHILE. Chile, 2003

Experiencia Académica

  •   Academic Full Time

    UNIVERSIDAD DE CHILE

    Faculty of Physical and Mathematical Sciences

    santiago, Chile

    2007 - A la fecha

Formación de Capital Humano


Have directed 22 Master thesis, 3 PhD thesis and 31 Undergraduate thesis. Have co-directed 7 Master thesis and 9 Undergraduate thesis.

Conception, creation and direction of the industry diploma Geomechanics Applied to Mining Design. wich is an intensive nine-month program offered by the Department of Mining Engineering at the University of Chile. Comprising six specialized courses, the diploma covers key areas such as rock mechanics fundamentals, rock excavation, geomechanics for both underground and open-pit mining, numerical modeling in geomechanics, and practical case study seminars. Since its inception in 2016, the program has trained 140 students, with annual participation as follows: 11 students in 2016, 17 in 2017, 22 in 2018, 25 in 2019, 14 in 2020 (online), 24 in 2021 (online), and 27 in 2022 (online), 19 in 2023 (online) and 32 in 2024 (online). This is associated with the development plan and has generated an impact on the industry, improving professional competencies of people. The people trained in this program will lead to higher levels of performance (excellence) at the industry, offering a better approach based on what they did not have the opportunity of acquire during their former studies and this is also a good way to update their knowledge of new researches.

Have led The Geosciences Training Program 2023, wich is a comprehensive initiative designed to strengthen professional skills in geomechanics and geotechnics, addressing the current and future demands of the mining industry in CODELCO. The program encompasses 100 pedagogical hours structured into five core modules and was designed for 73 students and profesionals of the Corporation.

Have led The Specific Geotechnics Training Program, wich is a 76-hour course delivered online with a final in-person workshop in Santiago. Designed for 57 participants, it focuses on developing skills in geotechnical design, monitoring, and risk management for both open-pit and underground mining. The program emphasizes practical workshops, case studies, and collaboration to standardize best practices and strengthen geotechnical expertise in mining operations.

Have led 63 projects, in the field of include rock mechanics, underground excavation stability, hydraulic fracturing effects, dynamic testing of reinforcement systems, empirical and numerical modeling for stope stability, slope stability analysis, seismic response of rock masses, and the integration of innovative technologies like the MineRoc platform for geomechanical analysis. The projects emphasize both fundamental and applied research, with a focus on enhancing safety, efficiency, and sustainability in mining operations.


Difusión y Transferencia


The software MineRoc has been demonstrated over 100 times for open stope design, benefiting the mining industry worldwide, including countries like Chile, Peru, Canada, and Kazakhstan. Additionally, significant scientific contributions include the organization of the 9th International Symposium on Rockbursts and Seismicity in Mines (RASIM 9) held in Santiago, Chile, in November 2017. During the same period, two specialized workshops were conducted: one focused on the impact of hydraulic fracturing on rock mass behavior, and the other on deformation-based support design for static and dynamic conditions in mining, both enhancing the understanding and practical applications of geomechanical principles in the industry.

Licence contract of MineRoc of the MineRoc software, granted to various mining companies and institutions. Key recipients include Newmont (Yanacocha and Argentina), Volcan Compañía Minera, Sociedad Punta del Cobre, Nexa Resources, Lundin Mining, Yamana Gold, Alamos Gold, and Grupo Minero Las Cenizas, covering projects in countries such as Chile, Peru, and Argentina. Academic licenses were also provided to Universidad Técnica Federico Santa María, Universidad Andrés Bello, Universidad de Concepción, and Universidad de Atacama. These licenses have supported empirical stability studies, mining planning, and training in geomechanics, enhancing safety and efficiency in mining operations globally.


Premios y Distinciones

  •   J.J. Denny Graduate Fellowship

    QUEEN'S UNIVERSITY AT KINGSTON

    Canada, 2005

    Established from the sale of gold nuggets donated by Mrs. J. J. Denny in memory of James Denny, M.Sc. '21 and awarded on the recommendation of the department to a graduate student in mining engineering.

  •   Queen’s Graduate Award (QGA)

    QUEEN'S UNIVERSITY AT KINGSTON

    Chile, 2006

    Registered funding eligible students who are in good academic standing may be eligible for a wide range of internal and external scholarships, bursaries and awards including: Queen's Graduate Awards (QGA)

  •   Government of Canada Award – Canadian Bureau for International Education (CBIE)

    Canadian Bureau for International Education (CBIE)

    Chile, 2006

    Government of Canada Award

  •   George C. Bateman Fellowship

    QUEEN'S UNIVERSITY AT KINGSTON

    Canada, 2007

    Value variable A bequest by the late George C. Bateman to provide graduate fellowships to students in Mining Engineering. Three awards are available annually.

  •   The Mel Williamson Fellowship

    QUEEN'S UNIVERSITY AT KINGSTON

    Canada, 2007

    Established by the Mel Williamson Foundation and awarded in alternate years to a graduate student in the Department of Mining Engineering and the Department of Geological Sciences and Geological Engineering. Awarded on the basis of academic excellence with consideration given to leadership ability, civil responsibility and/or athletic ability. Selection will be made by a committee comprised of representatives from each department.

  •   Queen’s Graduate Award (QGA)

    QUEEN'S UNIVERSITY AT KINGSTON

    Canada, 2007

    Registered funding eligible students who are in good academic standing may be eligible for a wide range of internal and external scholarships, bursaries and awards including: Queen's Graduate Awards (QGA)

  •   Queen’s Graduate Award (QGA)

    QUEEN'S UNIVERSITY AT KINGSTON

    Canada, 2008

    Registered funding eligible students who are in good academic standing may be eligible for a wide range of internal and external scholarships, bursaries and awards including: Queen's Graduate Awards (QGA)

  •   Ontario Graduate Scholarship (OGS)

    QUEEN'S UNIVERSITY AT KINGSTON

    Canada, 2008

    The Ontario Graduate Scholarships (OGS) promote excellence in graduate studies at the master's and doctoral levels. OGS awards are merit-based scholarships available to graduate students in all graduate disciplines in Ontario Universities. Eligible students apply for OGS through each university where they may be enrolled. The Queen’s University OGS competition is open to any eligible graduate student registered in or any eligible applicant to, a graduate program in the School of Graduate Studies.

  •   Best undergraduate professor

    UNIVERSIDAD DE CHILE

    Chile, 2012

    La Universidad de Chile entrega anualmente, en el marco de la conmemoración de su aniversario, una distinción a los mejores docentes de pregrado.

  •   Reconocimiento a la investigación e innovación

    UNIVERSIDAD DE CHILE

    Chile, 2021

    En el segundo día de celebración del aniversario 179, la Universidad de Chile realizó la ceremonia de Reconocimiento a la investigación, innovación y creación artística 2021. Fueron 198 académicas y académicos destacados de diversas unidades de la institución. De ellos, 55 son parte de la Facultad de Ciencias Físicas y Matemáticas.


 

Article (27)

Applying the Rock Engineering Systems Approach to the Stability of Bench Berms in Open Pit Mining
Dynamic Test Response of Ground Support Systems for Underground Excavations at the Walenstadt Testing Facility
Seismic Rock Mass Response to Tunnel Development with Destress Blasting in High-Stress Conditions
A fast method to develop an optimal operational sublevel stope design.
Evaluation of the seismic rock mass response to mining and the impact of preconditioning using an epidemic-type aftershock model.
Nonlinear criterion for strength mobilization in brittle failure of rock and its extension to the tunnel scale
A comparison of characteristic parameters of mining related and tectonic seismic aftershock sequences
Stability assessment of underground mine stopes subjected to stress relaxation
Robust estimation of the fracture diameter distribution from the true trace length distribution in the Poisson-disc discrete fracture network model
Seismic Parameters of Mining-Induced Aftershock Sequences for Re-entry Protocol Development
Geotechnical characterization of ore related to mud rushes in block caving mining.
Methodology for evaluation of mud rush risk in block caving mining.
Open pit mine planning considering geomechanical fundamentals
Spatial modeling of discontinuity intensity from borehole observations at El Teniente mine, Chile.
Three-dimensional effect of stresses in open stope mine design
Geotechnical characterization of ore related to mud rushes in block caving mining
Application of Synthetic Rock Mass modeling to veined core-size samples
Calibration and verification of two bonded-particle models for simulation of intact rock behavior
Geostatistical simulation to map the spatial heterogeneity of geomechanical parameters: A case study with rock mass rating
Statistical analysis of the stability number adjustment factors and implications for underground mine design
Truncated Gaussian Simulation to Map the Spatial Heterogeneity of Rock Mass Rating
Multifractal analysis in mining microseismicity and its application to seismic hazard in mine
Logistic regression and neural network classification of seismic records
Correlations between mining and seismicity for re-entry protocol development
A simple metric to quantify seismicity clustering
Omori´s Law Applied to Mining-Induced Seismicity and Re-entry Protocol Development
Hydrostatic compression model for sandy soils

BookWhole (1)

Rock mass response to mining and underground construction

ConferencePaper (81)

Back-Analysis of Caving Propagation in macroblocks N1S1 and S02 through numerical models in Chuquicamata underground mine project
Back-analysis of caving propagation using numerical models in Esmeralda Sur Mine’s Block 1, El Teniente
Development of Chilean open stope empirical stability database using MineRoc and their comparison with literature
Laboratory-scale dynamic test of load distribution elements: Validation at GMTC testing facility
Methodology Development to incorporate anisotropy in slope stability analysis at Los Bronces mine®
The role of surface support in controlling rockbursting conditions
Análisis de estabilidad empírico de caserones en Chile utilizando el software MineRoc®
Avances en la Actualización del Estándar de Suficiencia para el Soporte de la Información Geotécnica y Estructural para Minería de Rajos en Pórfidos Cupríferos: Aprendizajes desde las divisiones de CODELCO
Comprehensive Three-Dimensional Geological-Geostatistical-Numerical Model for open pit mining in competent rock
Ensayos dinámicos a escala de laboratorio para elementos de retención en minería subterránea
Estudio de Respuesta Peak y Post-Peak en Rocas Ígneas
INCORPORATION OF A WATER CONDITION FACTOR INTO THE STABILITY GRAPH METHOD USING SOFTWARE MINEROC
Laboratory-scale dynamic test of load distribution elements at Rancagua testing facility
'Stress shadowing effects during hydraulic fracturing in block caving operations
Double impact dynamic test of a ground support system: An analysis through numerical method.
Geotechnical Analysis for Narrow Vein Mining Using MineRoc Software
Rock Mechanics and Rock Engineering for Sustainable High Stress Underground Mining
Rock Mechanics and Rock Engineering for Sustainable High Stress Underground Mining.
Single impact dynamic test of a ground support system with a high-tensile steel wire mesh at the Walenstadt testing facility
Estimating the rock mass disturbance zone in open pit slopes related to stress relaxation
Recolección y análisis de datos para la optimización del proceso de fortificación para mina Tambo de Oro
Calibración de sistemas de fortificación para mina Tambo de Oro
Destress Blasting in The Access Tunnel Of de Andes Norte New
Metodología para la estimación de estabilidad y sobre-excavación de paredes de caserones en vetas angostas
Recolección y análisis de datos para la optimización del proceso de fortificación para mina Tambo de Oro
Assisted geotechnical design for sublevel open stoping using MineRoc® software.
Numerical modelling of dynamic testing for surface retaining elements used in underground mining.
Progress in the numerical modelling of dynamic testing for reinforcement and retaining elements used in underground excavations Proceedings s en minería por Sublevel Stoping a 38 años del método gráfico de estabilidad de Mathews
Scale effect on the post-peak behavior in uniaxial compression in dacite samples
Stability Analysis of Open Stope Mining using Support Vector Machines.
Analysis of the mobilization of strength parameters in brittle intact rock
DesafíoProgress in the numerical modelling of dynamic testing for reinforcement and retaining elements used in underground excavations Proceedings s en minería por Sublevel Stoping a 38 años del método gráfico de estabilidad de Mathews
Desafíos en minería por Sublevel Stoping a 38 años del método gráfico de estabilidad de Mathews
Evaluation of the seismic response of the rock mass using a model of seismic aftershocks of the epidemic type
Modeling the response of reinforcement elements during dynamic loading
Use of B Factor from Major Geological Faults’ Orientation on Mathews’ Stability Graph Method. A Case Study
Comportamiento frágil de túneles en roca dura ante altos esfuerzos. Aplicación a Andesita
Consideraciones para ensayos de compresión uniaxial con medición de Comportamiento post-peak y resultados preliminares
Desarrollo de Curvas de Estabilidad Local en Minería de Sublevel Stoping
Estudio de métodos de estimación de sobre-excavación para caserones abiertos
Estudio de métodos de estimación de sobre-excavación para caserones abiertos.
Evaluación del impacto de fallas en la Estabilidad de caserones
Modelamiento numérico de ensayo dinámico de refuerzo para excavaciones subterráneas
Modelamiento numérico del Comportamiento de elementos de refuerzo durante eventos dinámicos
Respuesta del macizo rocoso en minería a cielo abierto de gran profundidad
Respuesta del macizo rocoso en minería a cielo abierto de gran profundidad.
Stability Graph Comparison Between Mathews’ Method and A New Method Using B Factor from Major Geological Faults’ Orientation
Analysis of seismicity induced by undercutting and draw bell blasting at Reservas Norte, El Teniente Mine
Complex networks applied to induced seismicity: universalities
Development of new design tools for open stoping underground mines
Geotechnical Guidelines for Mine Planning in Sublevel Stoping Method
Modeling the Uncertainty in the Intensity of Geological Discontinuities in El Teniente Mine, Chile
Space or Space – time clustering? A selection criterion methodology using mining induced seismicity data
A methodology for the study of drawbell hang-up phenomena using three-dimensional discrete element
Adapting the stability graph method to specific site conditions in Mineroc
Analysis and modeling of the fragmentation process: Case studies at El Teniente Mine, Codelco- Chile
Application of Shear Strength Reduction technique for stability analysis of ground support.
Characterization and monitoring the stability state of production pillars
Estudio de métodos de estimación de subsidencia y su aplicación a casos históricos
Methodology for stability analysis of entry- type underground excavations
Progressive damaging in hard rock on underground excavations and numerical modelling with CWFS approach
'Characterization and Synthetic Simulations to Determine Rock Mass Behaviour at the El Teniente Mine, Chile. Part I
A dilution model for narrow vein mine design –A Case Study
Characterization and synthetic simulations to determine rock mass behaviour at the El Teniente mine
Development of an integrated platform for the stability analysis and design in sublevel stoping mines – MineRoc
Integración del Peligro Sísmico en Planificación Minera de Panel Caving
Mine Planning, Mathematical Optimization, Schedule, Selective Underground Methods
Multi-criteria optimization for scheduling of a bench and fill mine
Planificación minera a cielo abierto utilizando fundamentos geomecánicos
'Characterization and Synthetic Simulations to Determine Rock Mass Behaviour at the El Teniente Mine, Chile. Part II
Seismic hazard analysis at the El Teniente mine using a clustering approach
Simulating the effect of preconditioning in primary fragmentation
Towards an understanding of mud rush behaviour in block-panel caving mines
'Application of the Synthetic Rock Mass approach to characterize rock mass behavior at the El Teniente Mine, Chile'
A methodology for evaluating the performance os seismic indicators at El Teniente Mine, Codelco Chile
Temporal Evolution of Aftershock Sequences for Re-entry Protocol Development in Seismically Active Mines
Re-entry protocols for seismically active mines using statistical analysis of aftershock sequences
Scaling laws and their implications for re-entry protocol development
Guidelines for development of re-entry protocols in seismically active mines
Optimization of extraction sequence in a Bench & Fill mine considering the impact of exposure rate on dilution: a case study.
Short and Medium Term Mine Planning in Selective Underground Mining considering Equipment Performance

Proyecto (12)

Modelamiento Geoestadístico Intensidad Vetillas Blandas
Modelamiento geoestadístico de variable geotécnica
Desarrollo de herramientas de diseño para la mina subterránea-El Peñon
Desarrollo de una herramienta de planificación del comportamiento del barro en minería subterránea masiva
Estudio de macizos rocosos sintéticos mediante elementos discretos
Desarrollo de Herramientas de diseño para Minería Subterránea Selectiva
ESTUDIO DE SISMICIDAD INDUCIDA (INDICADORES – SISMICIDAD INDUCIDA/TRONADURA)
EVALUACIÓN DE FACTIBILIDAD TÉCNICA PARA UTILIZAR EL CRÁTER DE SUBSIDENCIA EN LA CONSTRUCCIÓN DE BOTADEROS
MODELAMIENTO NUMÉRICO DEL COMPORTAMIENTO DINÁMICO DEL REFUERZO DE MACIZO ROCOSO ANTE EVENTOS SÍSMICOS
Análisis y evaluación del protocolo de alerta sísmico actual
Servicios de ensayos de laboratorio especiales para rocas y estructuras geológicas y asesorías especializadas en geología y mecánica de rocas
Simulation of the Mechanical Behavior of Rock Using a Discrete Element Synthetic Rock Mass Approach
2
Xavier Emery

Full professor

Mining Engineering

UNIVERSIDAD DE CHILE

Santiago, Chile

1
Diana Comte

Full Professor

Department of Geophysics - Advanced Mining Technology Center

UNIVERSIDAD DE CHILE

Santiago, Chile

1
Denisse Pasten

Profesora Asistente

Departamento de Física

UNIVERSIDAD DE CHILE. FACULTAD DE CIENCIAS.

Santiago, Chile

104
JAVIER VALLEJOS

academic

mining enigneering

university of chile

las condes, Chile

1
Adeline Delonca

Academica

Departamento de Ingeniería Metalúrgica y de Materiales

Universidad Técnica Federico Santa María

Santiago, Chile

2
NELSON MORALES

Investigador Asociado

Universidad de Chile

Santiago, Chile

1
Andres Brzovic

Research Fellow

Engineering

UNIVERSIDAD DE O´HIGGINS

Rancagua, Chile

1
Phu Minh Vuong Nguyen

Investigador

Advanced Mining Technology Center

Santiago, Chile

3
Rodrigo Estay

Profesor asociado

Departamento de Ingeniería Civil Metalúrgica y de Materiales

Universidad Técnica Federico Santa María

Santiago, Chile

1
amin hekmatnejad

assistant professor

Universidad de Talca

curico, Chile

1
AMIN HEKMATNEJAD

assistant professor

school of mining engineering

Universidad de Talca

curico, Chile