What is Sigra?
Sigra is a privately owned company founded in 1994. It is based in Brisbane, Australia, and operates globally. Sigra is involved in all matters to do with the ground.
What we do
Sigra delivers solutions to our clients in all matters related to the ground. We understand what we are dealing with, and we have the capability to examine and analyse it in detail.
Guiding principles
Sigra’s guiding principle is to provide the best solutions possible to its clients. The solution must be feasible, sustainable, appropriate and economically sound.
Industries
News
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Meeting Sigra in 2022
Sigra has a number of conference appearances scheduled for 2022, both in Australia and internationally. Date Venue Appearance 10 to 11 February Resource Operators Conference, Queensland, Australia On line 27 February to 2 March SME Annual Conference and Expo, Salt Lake City, Utah, USA. At Agapito booth 28 to 30 March Bowen Basin Symposium, Mackay,
February 17, 2022 -
Recent & Forthcoming Publications
Gray I and Gibbons T R (2020). Longwall Behaviour in Massive Strata. Proceedings of the 20th Coal Operators’ Conference, Mining Engineering, University of Wollongong. Gray I (2020). Directional Drilling for Tunnel Investigation and Associated Testing Techniques. ITA-AITES World Tunnel Congress, WTC2020 and 46th General Assembly Kuala Lumpur Convention Centre, Malaysia 15-21 May 2020. Gray I,
February 17, 2022 -
Core Ovality – A Stress Difference Indicator
Sigra have been measuring stress in rock for a long time. First by its two dimensional overcore system (IST2D) which commenced use in 1996. Sigra has also conducted hydrofracture and hydrojacking tests to measure stress. More recently it has developed a three dimensional stress measurement overcore system (IST3D) suitable for use at depth in a
February 17, 2022