PLATINUM GROUP METALS LTD

26.3 Mining Methods

The current mine design is based on using diesel-powered underground mobile equipment. There have been significant advances in battery technology and the development of battery-powered mobile equipment. It is recommended to monitor the progress and application of the technology during the mine access development period and assess the opportunities this technology could present to the Waterberg Project, which may include reduced ventilation and refrigeration requirements, smaller diameter or fewer ventilation raises, and reduced electrical power consumption.

Waterberg Technical Report

It is recommended that the following geotechnical and geomechanical work is completed as part of Waterberg Project execution to validate mine design assumptions and support the detailed design for infrastructure.

• Conduct systematic geomechanical logging of future diamond drill core to further develop the database used for rock mass classification.

• Conduct additional laboratory testing of future diamond drill core for rock mass properties.

• Conduct in-situ stress measurements to confirm assumptions used in the geomechanical model.

• Drill geomechanical holes at each surface ventilation raise location to determine ground conditions and assess the stability of the 6.5 m and 6.0 m diameter raises. Investigate alternate locations to position ventilation raises to reduce the depth of overburden and/or weathered Waterberg Group sediments at the raise collar.

• Drill geotechnical holes at each box cut location to collect additional data, including the orientation of jointing and structures, for detailed engineering of the box cuts.

• Drill geotechnical holes along the path of the main declines from surface to further assess the ground conditions that will be encountered and confirm development advance rates and schedules.

• Conduct geomechanical mapping of excavations to further develop the database for rock mass classification.

It is also recommended to review the mine stope sequencing in the lower portions of the mine that are mined later in the mine life. Optimizing the mining sequence could reduce the amount of ground deformation. This should be performed as more detailed rock mechanics information is obtained through the mining process.