Johnson Ha

Research Associate

Biography

Johnson has been a research associate with Professor Grasselli’s research group since December 2017. He finished his BASc and MASc in Civil and Mineral Engineering at the University of Toronto in 2014 and 2017, respectively. His research interests include calibrating rock mechanics testing results to numerical models, simulating hydraulic fracturing processes, and simulating tunnel behaviour in highly anisotropic rock. Aside from rock mechanics research, he enjoys cooking, playing competitive volleyball, and video games.

October 2020
October 2020

Conference Paper

Invited talk on "Hydraulic fracturing in shale - the importance of anisotropy and geological structure" given as part of Earth Seminar Invited Guest Seminar series.

December 2017
December 2017

Research Position

Started as a Research Associate with Grasselli's Geomechanics Group

April 2017
April 2017

Research Position

Started as a Casual Researcher with Grasselli's Geomechanics Group

September 2016
September 2016

Award

Received the Queen Elizabeth II/Robert M. Smith Memorial Graduate Scholarship

September 2016
September 2016

Internship

Ontario’s TalentEdge Internship Program titled in partnership with Geomechanica Inc.

September 2015
September 2015

Award

Received the Queen Elizabeth II/Robert M. Smith Memorial Graduate Scholarship

August 2015
August 2015

Internship

Mitacs Accelerate program titled "Innovative design of a sound numerical model calibration process: from lab tests to input data" in partnership with Geomechanica Inc.

September 2014
September 2014

Award

Received the Queen Elizabeth II/Robert M. Smith Memorial Graduate Scholarship

September 2014
September 2014

Joined

Joined as a MASc Candidate

Publications

Li, M., Magsipoc, E., Abdelaziz, A., Ha, J., Peterson, K., & Grasselli, G. (2021). Mapping Fracture Complexity of Fractured Shale in Laboratory: Three-dimensional Reconstruction From Serial-section Images. Rock Mechanics and Rock Engineering.
Ha, J., Tatone, B. S. A., Gaspari, G. M., & Grasselli, G. (2021). Simulating tunnel support integrity using FEM and FDEM based on laboratory test data. Tunnelling and Underground Space Technology, 111, 103848.
Magsipoc, E., Li, M., Abdelaziz, A., Ha, J., Peterson, K., & Grasselli, G. (2020). Analysis of the Fracture Morphologies from a Laboratory Hydraulic Fracture Experiment on Montney Shale (p. 6). Presented at the ARMA/DGS/SEG International Geomechanics Symposium, ARMA: American Rock Mechanics Association.
Abdelaziz, A., Ha, J., & Grasselli, G. (2020). Excavation stability in heterogeneous anisotropic shale formation. Presented at the 36th International Geological Congress, Delhi, India.
Li, M., Magsipoc, E., Abdelaziz, A., Ha, J., Guo, J., Peterson, K., & Grasselli, G. (2020). Mapping Fracture Complexity in Hydraulically Fractured Montney Shale by Serial Section Reconstruction (p. 9). Presented at the 54th U.S. Rock Mechanics/Geomechanics Symposium, ARMA: American Rock Mechanics Association.
Ha, J., & Grasselli, G. (2020). Simulating the Excavation Damaged Zone of A Supported Deep Geological Repository Using FDEM (p. 6). Presented at the 54th U.S. Rock Mechanics/Geomechanics Symposium, ARMA: American Rock Mechanics Association.
Alghalandis, Y. F., Ha, J., & Grasselli, G. (2020). Smash – Smart Meshing for Realistic Geomechanical Models of Rock Slope Failure Processes (Vol. All Days). Presented at the 54th U.S. Rock Mechanics/Geomechanics Symposium, ARMA-2020-1733.
Abdelaziz, A., Ha, J., Abul Khair, H., Adams, M., Tan, C. P., Musa, I. H., & Grasselli, G. (2019). Unconventional Shale Hydraulic Fracturing Under True Triaxial Laboratory Conditions, the Value of Understanding Your Reservoir (p. 16). Presented at the SPE Annual Technical Conference and Exhibition - ATCE 2019, SPE: Society of Petroleum Engineers.
Li, M., Magsipoc, E., Abdelaziz, A., Ha, J., & Grasselli, G. (2019). Mapping Fracture Complexity in Shale Rock.
Ha, J., & Grasselli, G. (2018). FDEM Tunnel Excavation Modelling in Layered Rock. Presented at the 10th Asian Rock Mechanics Symposium The ISRM International Symposium for 2018 (ARMS10), Singapore.
He, T.-M., Zhao, Q., Ha, J., Xia, K., & Grasselli, G. (2018). Understanding progressive rock failure and associated seismicity using ultrasonic tomography and numerical simulation. Tunnelling and Underground Space Technology, 81, 26–34.
Ha, J., Abdelaziz, A., & Grasselli, G. (2018). Hydraulic Fracturing under True Triaxial Conditions.
Zhao, Q., He, T. M., Ha, J., Xia, K., & Grasselli, G. (2018). Dataset for time-lapse ultrasonic tomography of a granite slab under uniaxial compression test. Data Brief, 20, 614–616.
Ha, J., & Grasselli, G. (2018). Three-dimensional FDEM modelling of laboratory tests and tunnels. Presented at the 52nd U.S. Rock Mechanics/Geomechanics Symposium, Seattle: American Rock Mechanics Association (ARMA).
Qiu, Y., Ha, J., Peterson, K., & Grasselli, G. (2017). Finite-Discrete Element Modeling of Time-Dependent Mechanisms in Southern Ontario Shales. Presented at the GeoOttawa 2017 - 70th Canadian Geotechnical Conference, Ottawa.
Ha, J. (2017). FDEM Tunnel Modelling in Georgian Bay Shale (MASc Thesis). University of Toronto.
Ha, J., Lisjak, A., & Grasselli, G. (2015). FDEM modelling of thermo-mechanical wellbore instabilities within shale formations. 49th U.S. Rock Mechanics / Geomechanics Symposium 2015 (Vol. 3, pp. 1762–1769). Presented at the 49th U.S. Rock Mechanics/Geomechanics Symposium, San Francisco, California: American Rock Mechanics Association (ARMA).Scopus.
Ha, J., Lisjak, A., & Grasselli, G. (2015). FDEM Modelling of Thermal Wellbore Instabilities within Shale Formations. Presented at the Geoconvention 2015, Calgary.