Orbelo Gold Mine – Structure design analysis, review, modification, shop fabrication drawings and indemnification


The Gympie Gold Project is a unique brownfield project comprising extensive underground workings that give access to 500,000oz of JORC (2012) ore Resources and deep, continuous regional gold mineralization. The project hosts several near-mine prospects supported by prior exploration with the potential to support large-scale, low-impact gold developments. Development is targeted for a regional exploration strategy for the Gympie Gold Project.


RSGx’s scope of work included a comprehensive Engineering Review and Verification of steel & concrete structures. The main objective of this review was to ensure compliance with a range of Australian Standards such as AS 1657 (Design for Access and Mobility), AS 4100 (Steel Structures), AS 3600 (Concrete Structures), AS 1170.2 (Structural Design Actions – Wind Actions) and AS 1170.0 (Structural Design Actions – General Principles) for Indemnification of the structure by RPEQ to ensure that it is fit for purpose and can withstand the intended loads.

To achieve compliance with these standards, the following steps were undertaken:

  • Conduct an initial review of the existing design to identify any non-compliances with the relevant standards.
  • Propose and implement design modifications as required to bring the design into compliance with the standards.
  • Finite Element Analysis (FEA) to determine the structural capacity of the steel structures under both static and dynamic loading.
  • Software such as SpaceGass, Altair, SolidWorks, and Robot Structural Analysis was used for this analysis.
  • Analysis of vibration due to machinery(pumps & screens) to ensure compliance with relevant standards and to avoid potential fatigue issues.

Read more about the project in the project case study, which can be downloaded through the below link.