Three-dimensional discrete element method simulation of core disking

Wu, S.; Wu, H.; Kemeny, J.

doi:10.1007/s11600-018-0136-z

Artykuł - szczegóły

Tytuł artykułu

Three-dimensional discrete element method simulation of core disking

Autorzy

Wu S. , Wu H. , Kemeny J.

Wybrane pełne teksty z tego czasopisma

https://www.springer.com/journal/11600

Identyfikatory

DOI

10.1007/s11600-018-0136-z

Warianty tytułu

Języki publikacji

Abstrakty

The phenomenon of core disking is commonly seen in deep drilling of highly stressed regions in the Earth’s crust. Given its close relationship with the in situ stress state, the presence and features of core disking can be used to interpret the stresses when traditional in situ stress measuring techniques are not available. The core disking process was simulated in this paper using the three-dimensional discrete element method software PFC3D (particle flow code). In particular, PFC3D is used to examine the evolution of fracture initiation, propagation and coalescence associated with core disking under various stress states. In this paper, four unresolved problems concerning core disking are investigated with a series of numerical simulations. These simulations also provide some verification of existing results by other researchers: (1) Core disking occurs when the maximum principal stress is about 6.5 times the tensile strength. (2) For most stress situations, core disking occurs from the outer surface, except for the thrust faulting stress regime, where the fractures were found to initiate from the inner part. (3) The anisotropy of the two horizontal principal stresses has an effect on the core disking morphology. (4) The thickness of core disk has a positive relationship with radial stress and a negative relationship with axial stresses.

Słowa kluczowe

core disking discrete element method numerical simulation axial stress radial stress

dysk twardy metoda elementów dyskretnych symulacja numeryczna stres osiowy

Wydawca

Instytut Geofizyki PAN
Springer

Czasopismo

Acta Geophysica

Rocznik

2018

Tom

Vol. 66, no. 3

Strony

267--282

Opis fizyczny

Bibliogr. 41 poz.

Twórcy

autor

Wu S.

University of Science and Technology Beijing Beijing China
Key Laboratory of Ministry for Efficient Mining and Safety of Metal MinesUniversity of Science and Technology Beijing Beijing China
Kunming University of Science and Technology Kunming China

autor

Wu H.

wuhaoyan@live.cn

University of Science and Technology Beijing Beijing China
Key Laboratory of Ministry for Efficient Mining and Safety of Metal MinesUniversity of Science and Technology Beijing Beijing China

autor

Kemeny J.

University of ArizonaTucsonUSA

Bibliografia

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Typ dokumentu

Bibliografia

Identyfikator YADDA

bwmeta1.element.baztech-49517a8e-e6a2-4154-9abe-2c4c92d080fe