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A novel image-based approach for interactive characterization of rock fracture spacing in a tunnel face
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Abstract:
This paper presents a novel integrated method for interactive characterization of fracture spacing in rock tunnel sections. The main procedure includes four steps: (1) Automatic extraction of fracture traces, (2) digitization of trace maps, (3) disconnection and grouping of traces, and (4) interactive measurement of fracture set spacing, total spacing, and surface rock quality designation (S-RQD) value. To evaluate the performance of the proposed method, sample images were obtained by employing a photogrammetry-based scheme in tunnel faces. Experiments were then conducted to determine the optimal parameter values (i.e. distance threshold, angle threshold, and number of fracture trace grouping) for characterizing rock fracture spacing. By applying the identified optimal parameters involved in the model, the proposed method could lead to excellent qualitative results to a new tunnel face. To perform a quantitative analysis, three methods (i.e. field, straightening, and the proposed method) were employed in the same study and comparisons were made. The proposed method agrees well with the field measurement in terms of the maximum and average values of measured spacing distribution. Overall, the proposed method has reasonably good accuracy and interactive advantage for estimating the ultimate fracture spacing and S-RQD. It can be a possible extension of existing methods for fracture spacing characterization for two-dimensional (2D) rock tunnel faces.
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URL: https://eprints.whiterose.ac.uk/182736/ https://eprints.whiterose.ac.uk/182736/1/1-s2.0-S167477552100192X-main.pdf
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The trans-ancestral genomic architecture of glycemic traits.
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In: Nature genetics, vol. 53, no. 6, pp. 840-860 (2021)
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A Counter-Reformation Reaction to Slovenian and Croatian Protestantism: The Symbol of St. Athanasius in a Creed of 1624
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Cavallini Ivano. - : Hollitzer Verlag, 2018. : country:AT, 2018. : place:Vienna, 2018
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ASPIRE: A multi-site community-based participatory research project to increase understanding of the dynamics of violence against immigrant and refugee women in Australia
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Age of language learning shapes brain structure: A cortical thickness study of bilingual and monolingual individuals
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In: Symplectic Elements at Oxford ; Scopus (http://www.scopus.com/home.url) (2014)
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