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AuthorEid Hisham T.
AuthorElshafie Mohammed Z. E. B.
AuthorO'Sullivan Barry
Available date2024-06-09T07:52:58Z
Publication Date2024
Publication NameInternational Journal of Geomechanics
ResourceScopus
Identifierhttp://dx.doi.org/10.1061/IJGNAI.GMENG-8939
ISSN1532-3641
URIhttp://hdl.handle.net/10576/55906
AbstractA data-driven approach is used to show the significant discrepancy between the coefficients of permeability that are estimated through packer field tests and those back-calculated from the actual discharge pumped out of randomly fractured rock masses (i.e., masses that do not have predominate oriented fracture sets) using either dewatering or pumping well systems. The presented data, some of the richest of its kind, are used to develop a novel correlation between the estimated and back-calculated coefficients of permeability. A procedure is proposed to evaluate the permeability of the rock masses that considers two different but frequently encountered scenarios: (1) lack of any field permeability test data; or (2) only packer test results are available. Numerical examples are presented to illustrate how the suggested procedure could be used. It constitutes an advance in the state of practice because the commonly used procedures to estimate the permeability of randomly fractured rock masses employ the direct use of packer field test results, which, as the data shows, could be orders of magnitudes out. The proposed procedure could be particularly useful for practitioners when faced with cases where field pumping tests are not feasible due to budget, time constraints, or both. It gives them a simple and reliable approach (based on case histories) to produce preliminary designs of dewatering systems in randomly fractured rocks.
SponsorThe funding provided by the Qatar National Research Fund, Qatar, under Project No: NPRP 12S-0314-190366, for this research work is deeply appreciated. The authors also acknowledge Dr. Reiner Stollberg of Fugro (Qatar) for providing some field data. The help of Alhassan Mahmoud and Omar Ibrahim, research assistants at Qatar University, in organizing the data and producing some of the paper's charts is also appreciated.
Languageen
PublisherAmerican Society of Civil Engineers (ASCE)
SubjectCase history; Dewatering; Fractures; Groundwater; Permeability; Rock
TitleSimple Procedure for Preliminary Estimation of the Permeability of Randomly Fractured Rock Masses
TypeArticle
Issue Number3
Volume Number24
dc.accessType Open Access


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