Browse > Article

Discrete element simulations of continental collision in Asia  

Tanaka Atsushi (Sumiko Consultants Co., Ltd.)
Sanada Yoshinori (Department of Civil and Earth Resources Engineering, Kyoto University Faculty of Engineering)
Yamada Yasuhiro (Department of Civil and Earth Resources Engineering, Kyoto University Faculty of Engineering)
Matsuoka Toshifumi (Department of Civil and Earth Resources Engineering, Kyoto University Faculty of Engineering)
Ashida Yuzuru (Department of Civil and Earth Resources Engineering, Kyoto University Faculty of Engineering)
Publication Information
Geophysics and Geophysical Exploration / v.8, no.1, 2005 , pp. 1-6 More about this Journal
Abstract
Analogue physical modelling using granular materials (i.e., sandbox experiments) has been applied with great success to a number of geological problems at various scales. Such physical experiments can also be simulated numerically with the Discrete Element Method (DEM). In this study, we apply the DEM simulation to the collision between the Indian subcontinent and the Eurasian Plate, one of the most significant current tectonic processes in the Earth. DEM simulation has been applied to various kinds of dynamic modelling, not only in structural geology but also in soil mechanics, rock mechanics, and the like. As the target of the investigation is assumed to be an assembly of many tiny particles, DEM simulation makes it possible to treat an object with large and discontinuous deformations. However, in DEM simulations, we often encounter difficulties when we examine the validity of the input parameters, since little is known about the relationship between the input parameters for each particle and the properties of the whole assembly. Therefore, in our previous studies (Yamada et al.,2002a,2002b,2002c), we were obliged to tune the input parameters by trial and error. To overcome these difficulties, we introduce a numerical biaxial test with the DEM simulation. Using the results of this numerical test, we examine the validity of the input parameters used in the collision model. The resulting collision model is quite similar to the real deformation observed in eastern Asia, and compares well with GPS data and in-situ stress data in eastern Asia.
Keywords
tectonics; analogue experiment; numerical simulation; discrete element method;
Citations & Related Records
연도 인용수 순위
  • Reference
1 김중열, 1989, 탄성파 발생원배열에 의한 P-방사형 편극, 대한광산학회지, 26, 28-38
2 김중열, 김유성, 2004, 지면 탄성파 반사법의 효율성 향상을 위한 탄성파 발생원 에너지 방사형 변조기법, 한국지반공학회 정기학술발표회 논문집, 807-814
3 김중열, 현혜자, 김기석, 김유성, 성낙훈, 구자학, 1990, 탄층연속성 조사를 위한 채널파의 연구(III), 한국동역자원연구소, 과학기술처
4 김중열, 김유성, 안태봉, 박인준, 민동주, 김재현, 김동범, 2004, 댐체 물성 평가를 위한 비파괴 조사 학술 용역, 사단법인 한국 대댐회, 한국수자원공사 수자원연구