Joint inversion of apparent resistivity and frequency domain induced polarization data due to anomalous body ahead of the tunnel face

Joint inversion of apparent resistivity and frequency domain induced polarization data due to anomalous body ahead of the tunnel face | Research Square window.SnipcartSettings = { analytics: { enabled: false } }; (function() { var accessVector = localStorage.getItem('access_vector') || ''; window.dataLayer = window.dataLayer || []; if (accessVector) { window.dataLayer.push({ user: { profile: { profileInfo: { snid: accessVector } } } }); } })(); (function(w,d,s,l,i){w[l]=w[l]||[];w[l].push({'gtm.start':new Date().getTime(),event:'gtm.js'});var f=d.getElementsByTagName(s)[0],j=d.createElement(s),dl=l!='dataLayer'?'&l='+l:'';j.async=true;j.src='https://www.googletagmanager.com/gtm.js?id='+i+dl;f.parentNode.insertBefore(j,f);})(window,document,'script','dataLayer','GTM-K279D39R'); Browse Preprints In Review Journals COVID-19 Preprints AJE Video Bytes Research Tools Research Promotion AJE Professional Editing AJE Rubriq About Preprint Platform In Review Editorial Policies Our Team Advisory Board Help Center Sign In Submit a Preprint Cite Share Download PDF Research Article Joint inversion of apparent resistivity and frequency domain induced polarization data due to anomalous body ahead of the tunnel face Un-Gyong Pak, Il-Gyong Ri, Gwang-Chol Jon, Sung-Jin Han, Song-Hyok Ri This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-5445054/v1 This work is licensed under a CC BY 4.0 License Status: Published Journal Publication published 10 Oct, 2025 Read the published version in Acta Geophysica → Version 1 posted 6 You are reading this latest preprint version Abstract It is one of the important problems to predict the geologic bodies ahead of the tunnel face not only for mining in the coal mines and the mines but also for the geotechnical tunnel construction related with infrastructure construction. We have developed a method of joint inversion of apparent resistivity and frequency domain induced polarization (IP) data using pole-diploe array to find parameters of geologic body which exists ahead of the tunnel face on the basis of plate and sphere model. Firstly, by synthetically analyzing apparent resistivity and Percent Frequency Effect (PFE) due to the plate and sphere ahead of the tunnel, we determined numbers of terms of infinite series in formulas of forward modeling to use for joint inversion of apparent resistivity and frequency domain IP data in the tunnel. And two methods are proposed to estimate existence of geologic body ahead of the tunnel face. One of them is to use the extreme of apparent resistivity curve and another one is to use inverted resistivity and PFE models. Secondly, we described the method of joint inversion of apparent resistivity and IP data which applies logarithmic barrier method to the algorithm of inversion. Through synthetic data experiments, we assessed not only the reliability and accuracy of the method but also the effects of the number of current electrodes and ratio between length of the survey line and the distance from the tunnel face to the anomalous body on accuracy of the method. Finally a field example is given. Joint inversion Resistivity method frequency domain IP tunnel Full Text Cite Share Download PDF Status: Published Journal Publication published 10 Oct, 2025 Read the published version in Acta Geophysica → Version 1 posted Editorial decision: Major revisions 31 Mar, 2025 Reviewers agreed at journal 09 Jan, 2025 Reviewers invited by journal 07 Jan, 2025 Editor invited by journal 07 Jan, 2025 Editor assigned by journal 28 Dec, 2024 First submitted to journal 23 Dec, 2024 You are reading this latest preprint version Research Square lets you share your work early, gain feedback from the community, and start making changes to your manuscript prior to peer review in a journal. As a division of Research Square Company, we’re committed to making research communication faster, fairer, and more useful. We do this by developing innovative software and high quality services for the global research community. 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Also discoverable on Platform About Our Team In Review Editorial Policies Advisory Board Help Center Resources Author Services Accessibility API Access RSS feed Manage Cookie Preferences © Research Square 2026 | ISSN 2693-5015 (online) Privacy Policy Terms of Service Do Not Sell My Personal Information {"props":{"pageProps":{"initialData":{"identity":"rs-5445054","acceptedTermsAndConditions":true,"allowDirectSubmit":false,"archivedVersions":[],"articleType":"Research Article","associatedPublications":[],"authors":[{"id":399000588,"identity":"8a852ec1-4f46-49f3-8eed-e2f1e8b1e9bf","order_by":0,"name":"Un-Gyong Pak","email":"","orcid":"","institution":"Kim Il Sung University","correspondingAuthor":false,"prefix":"","firstName":"Un-Gyong","middleName":"","lastName":"Pak","suffix":""},{"id":399000589,"identity":"cfef9540-bf82-4d7d-abb0-3862e2f651f5","order_by":1,"name":"Il-Gyong 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