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DTSTART;TZID=Australia/Brisbane:20260604T180000
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SUMMARY:The ground investigation for a storage cavern in metamorphic rock at 600 m depth
DESCRIPTION:Overview\nThis presentation describes the processes used in the investigations for a deep compressed air storage cavern in a complex metamorphic environment. The exploration process involved drilling using HQ-3 coring techniques from surface and also from an adjacent underground mine. The latter were two 460 m boreholes drilled just sub horizontally across the planned cavern location. \nThe core from these holes was logged for structure and sampled for rock property testing. Because a significant portion of the rock was highly anisotropic the test methods used had to be adapted. This included alternative ways of working with point load testing\, triaxial testing for anisotropy of moduli and some special shear tests.  Because of the importance of determining potential leakage of groundwater into the cavern\, or of air out of the cavern\, the correct measurement of the ground fluid pressure and the permeability of the rock mass were extremely important. \nTesting had to be conducted in stages to cover the entire length of the holes. The method used was to fit the drill rods with a straddle packer assembly\, downhole valve system and suitable precision pressure monitoring with operator read out. First the test zone was shut in to recover pressure. This was followed by a period of injection or production which was followed by another shut in period. These tests followed oilfield practice but with tools designed to work with HRQ drill rod and used horizontally. \nThe rock stress was determined by the use of three dimensional overcore tools used up to 441 m laterally. Other techniques could have also been advantageously used to fill in the sparse overcore data in the extremely complex geological environment. The vertical and the horizontal holes were logged using both acoustic televiewer and full wave sonic sondes. \nThe conclusions of the study were that the rock mass was heterogeneous but fit for purpose provided that the correct design decisions were made. The presentation also looks at what can be achieved from open hole drilling test techniques compared to coring and the comparative costs of these. This has particular relevance to tunnel investigations. \nProgram timeline\nOnline \n6.00pm – Presentation commences \n7.00pm – Presentation concludes \nIn-Person \n5.30pm – Registration\, networking & catering \n6.00pm – Presentation commences\, networking \n7.00pm – Event concludes \nLearning outcomes\n\nYou should gain an appreciation of the importance of geology.\nYou will gain an understanding of the methods used to determine the states of stress in rock and the measurement of anisotropic rock properties.\nThe methods used and the importance of determining fluid pressures and permeability properly are extremely important and should totally replace conventional packer testing.\n\nAbout the speaker\n\n\n\nIan Gray\nManaging Director\, Sigra Pty Ltd\n\nDr Ian Gray is the managing director of Sigra Pty Ltd\, a role he has held for 32 years. In his career he has had the roles of mining\, civil\, geotechnical and reservoir engineers\, engineering geologist and hydrogeologist. He has worked in 20 countries dealing with mines\, tunnels\, slopes\, petroleum reservoirs and anything else in the ground. One of his passions is actually measuring things in the ground properly. To do this he has developed a suite of equipment and techniques. He also works with a variety of drilling systems.
URL:https://australiantunnellingsociety.com.au/ats-event/the-ground-investigation-for-a-storage-cavern-in-metamorphic-rock-at-600-m-depth/
LOCATION:Online and in person at: Level 9\, 340 Adelaide Street\, Brisbane
CATEGORIES:Online,Queensland,Webinar
ATTACH;FMTTYPE=image/png:https://australiantunnellingsociety.com.au/wp-content/uploads/2026/05/Screenshot-2026-05-05-105122.png
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DTSTART;TZID=Australia/Sydney:20260609T210000
DTEND;TZID=Australia/Sydney:20260609T223000
DTSTAMP:20260514T061338Z
CREATED:20260514T061203Z
LAST-MODIFIED:20260514T061338Z
UID:297511-1781038800-1781044200@australiantunnellingsociety.com.au
SUMMARY:Single vs Twin-Tube Tunnel Configurations in Urban Environments
DESCRIPTION:Overview\nThis instalment of the ITA lecture series will focus on ‘Single vs Twin-Tube Tunnel Configurations in Urban Environments: A Risk-Informed\, Multi-Criteria Decision Framework’. The session is in collaboration with ITA AITES WG20. \nThis episode will feature four parts: \n\nProblem statement – Wout Broere\nGeneral multi criteria method – Giuseppe Gaspari\nCase histories from Asia and Europe – Pedro Ramírez Rodríguez \nCase histories from America – pros/cons – Sotirios Vardakos\n\nFollowing the three presentations there will be time for Q&A with the presenters \nThe ITA lecture series remains free and open to all. For all those that cannot join ‘live’ online\, please register and you will receive a link to stream the episode after the event – this link will be valid for four weeks. After these four weeks\, anyone wanting to watch the episode can do so by registering for the episode on the ITA website\, but there will be a small fee to watch. \nRegister for the event here: https://www.itacet.org/session/lunchtime-lecture-series56/
URL:https://australiantunnellingsociety.com.au/ats-event/ita-lecture-single-vs-twin-tube-tunnel-configurations-in-urban-environments/
LOCATION:Online
CATEGORIES:Online
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DTSTART;TZID=Australia/Sydney:20260616T190000
DTEND;TZID=Australia/Sydney:20260616T200000
DTSTAMP:20260616T001443Z
CREATED:20260610T030903Z
LAST-MODIFIED:20260616T001443Z
UID:313317-1781636400-1781640000@australiantunnellingsociety.com.au
SUMMARY:BTS–ATS Young Members Collaboration: Sustainability and Innovation in Tunnelling
DESCRIPTION:🗓️ Tuesday 16th June 2026\n⏰ 10:00am UGT | 07:00pm AEST\n📍 Online (MS Teams) \nThe BTSYM and ATSym are exited to host a mini-conference on sustainability and innovation in tunnelling. Please join us for this roughly one hour event to bring together the tunnelling community from opposite sides of the world! \n🗣️ Speakers: \n\nWilliam Heenan\, Lead Design Manager\, Bouygues Travaux Publics UK will present “Optimising Tunnel Walkway Construction.”\nApostolos Tsoumelekas\, Materials Engineering Manager\, SCSjv will present “Excavation waste London Clay utilisation in concrete applications.”\nMichael Kemp\, CEO\, Wagner will present “Engineering Properties of EFC Geopolymer for Tunnelling Applications”\nJessica Holz\, Sustainability Expert\, Aurecon will present “Sustainable Design for Tunnels”\n\nPre-register your attendance at:\nhttps://events.teams.microsoft.com/event/e155cb66-f375-4470-bb2c-f90dc589e7a4@5e4e864c-3b82-4180-a515-5c8fb718fff8 \n 
URL:https://australiantunnellingsociety.com.au/ats-event/bts-ats-young-members-collaboration-sustainability-and-innovation-in-tunnelling/
LOCATION:Online
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DTSTART;TZID=Australia/Adelaide:20260623T170000
DTEND;TZID=Australia/Adelaide:20260623T200000
DTSTAMP:20260514T045611Z
CREATED:20260514T045247Z
LAST-MODIFIED:20260514T045611Z
UID:297459-1782234000-1782244800@australiantunnellingsociety.com.au
SUMMARY:International Women in Engineering Day 2026
DESCRIPTION:Overview\nThe Australian Geomechanics Society\, with the support of ATS South Australia\, is excited to invite you to our International Women in Engineering Day celebration on Tuesday\, 23rd June 2026\, hosted in the beautiful Gallery – Level One. \nThis year\, we’re bringing together industry professionals to honour the contributions\, leadership\, and impact of women across the ground engineering industry. \nEvent Highlights: \n\nCocktail‑themed evening with drinks and roaming canapés\nThree inspiring keynote speakers sharing insights from across engineering practice\nA panel discussion exploring challenges\, opportunities\, and the future of women in our field\nPlenty of time for networking with colleagues\, peers\, and industry leaders\n\nWe look forward to raising a glass with you as we celebrate innovation\, collaboration\, and the extraordinary women shaping our industry. \nSpeakers
URL:https://australiantunnellingsociety.com.au/ats-event/international-women-in-engineering-day/
LOCATION:The Gallery Rooftop Bar\, Level One - Gallery Room\, 30 Waymouth St\, Adelaide\, South\, Australia
CATEGORIES:South Australia
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DTSTART;TZID=Australia/Brisbane:20260625T173000
DTEND;TZID=Australia/Brisbane:20260625T193000
DTSTAMP:20260430T060853Z
CREATED:20260309T032436Z
LAST-MODIFIED:20260430T060853Z
UID:256542-1782408600-1782415800@australiantunnellingsociety.com.au
SUMMARY:David Sugden Roadshow - Brisbane - Uncovering veins: impacts on deep tunnel engineering
DESCRIPTION:Overview\nHydrothermal veins are often overlooked or misinterpreted within deep\, heterogeneous rock masses\, yet their behaviour can dramatically influence tunnelling outcomes. In his award winning 2025 David Sugden Award paper\, Yosafat Sinaga reveals how these vein systems are frequently mistaken for open joints\, leading to inaccurate geological models and flawed design assumptions. This session will explore why correct vein characterisation is essential for both safety and project efficiency. Misjudging these features can result in two costly extremes: overly conservative support designs that inflate construction budgets\, or unexpected\, hazardous rockbursts triggered by misunderstood ground conditions. By examining real case insights and engineering implications\, this event will provide tunnelling and geotechnical professionals with a deeper understanding of the subsurface complexities that lie beneath\, and how better interpretation can reduce risk and improve decision making. \nProgram timeline\n5:30pm AEST – Registration and networking \n6:00pm AEST – Presentation commences \n6:50pm AEST – Q&A \n7:00pm AEST – Presentation concludes\, networking \n7:30pm AEST – Event concludes \nLearning outcomes\n\nWalk away with practical steps to avoid design errors caused by misinterpreting veins in deep tunnel projects.\nCorrectly interpret veined rock masses in core logging and face mapping and recognise when “broken-looking” core does not mean a poor-quality\, jointed rock mass.\nHow vein intensity and in situ stress interact to drive overbreak\, damage propagation\, and reinforcement demand in high-stress excavations\n\nAbout the speaker\n\n\n\nYosafat Sinaga\nGeotechnical Engineer\, NOMA Consulting\nYosafat Sinaga is a Geotechnical Engineer at NOMA Consulting with over five years of experience delivering geotechnical design and construction support for mining and tunnelling projects in Australia\, Singapore\, Papua New Guinea\, and Indonesia. He has contributed to major infrastructure and underground mining developments\, specialising in rock mass and structural geological characterisation\, advanced 2D and 3D numerical modelling\, and primary tunnel support design optimisation. His recent project work includes optimising primary support design for road tunnels excavated using the Drill & Blast method\, developing detailed designs for temporary Earth Retaining and Stabilising Structures (ERSS) for rail and service tunnels\, and providing geotechnical input for underground copper mining projects employing sub-level and block caving methods.
URL:https://australiantunnellingsociety.com.au/ats-event/uncovering-veins-impacts-on-deep-tunnel-engineering/
LOCATION:Engineers Australia QLD\, Level 9\, 340 Adelaide St\, Brisbane\, QLD\, 4000\, Australia
CATEGORIES:Queensland
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