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The effect of fracture pattern on in situ rock stresses studied by the distinct element method
KTH.
2018 (English)In: ISRM International Symposium 2000, IS 2000, International Society for Rock Mechanics , 2018Conference paper, Published paper (Refereed)
Abstract [en]

By using the two-dimensional distinct element method and the code UDEC, this study numerically models the effect of fracture pattern on rock stresses. Three geological fracture pattern models are considered: (1) two parallel fractures, (2) multiple parallel fractures and (3) intersecting fractures. For each model, the mechanical properties of intact rocks, strength parameters of the fractures, boundary stress ratio K (K=σ1/σ2) and the angle α between fracture and the direction of maximum boundary stress are varied. By placing profiles or points in the models to monitor stress variation across fractures in the models, the quantitative relation between fracture pattern and the magnitude and orientation of stresses has been derived numerically. As a result, stresses in the vicinity of fractures are determined.

Place, publisher, year, edition, pages
International Society for Rock Mechanics , 2018.
Keywords [en]
Stresses, Distinct element methods, Fracture pattern, Intersecting fractures, Parallel fractures, Quantitative relations, Strength parameters, Stress variations, Two-dimensional distinct element method, Fracture
National Category
Geophysical Engineering
Identifiers
URN: urn:nbn:se:kth:diva-236364Scopus ID: 2-s2.0-85053864621OAI: oai:DiVA.org:kth-236364DiVA, id: diva2:1260990
Conference
ISRM International Symposium 2000, IS 2000, 19 November 2000 through 24 November 2000
Note

QC 20181106

Available from: 2018-11-06 Created: 2018-11-06 Last updated: 2018-11-06Bibliographically approved

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Stephansson, Ove

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