# Standup time estimation of undercut moist sand slope using numerical simulation

• Laddawon Dul ภาควิชาวิศวกรรมเหมืองแร่ คณะวิศวกรรมศาสตร์ มหาวิทยาลัยเชียงใหม่
• Cheowchan Leelasukseree Department of Mining Engineering, Faculty of Engineering, Chiang Mai University

### บทคัดย่อ

Undercut slope is defined as a slope, which is excavated at its toe. An undercut slope would be failed if undercut width is equal to or greater than its maximum undercut width. Sometimes, the undercut slope is temporarily stable. The undercut slope could displace slowly over a period and it finally fails. The period of undercut slope in stable is called standup time. In this paper, the standup time was estimated by using numerical simulations. A series of numerical simulations using 3DEC was performed to study of standup time of undercut slopes. The numerical models were applied the physical properties and creep parameters of moist sand, which were tested in laboratory. Mohr-Coulomb and Burgers model were assigned to the numerical simulations. The slope inclination of the numerical models was varied. The slope inclinations were 50ᵒ, 30ᵒ, 18ᵒand 15ᵒ. The undercut slope models showed a relationship between slope inclination, undercut width and standup time. When the slope inclination was shallower than the friction angle of bedding plane, its standup time and undercut width were longer and wider than the steeper. The slope inclination was inversely proportional to undercut width while the undercut width was proportion to the standup time.

### จำนวนการดาวน์โหลด

ยังไม่มีข้อมูลการดาวน์โหลด

### รายการอ้างอิง

[1] Pipatpongsa, T., Khosravi, M., Takamura, J. & Leelasukseree, C., 2016. Modelling concepts of passive arch action in undercut slopes. In Proceedings of APSSIM 2016 in Australian Center for Geomechanics, 507-520. Brisbane: Australia.

[2] Khosravi, M. et al., 2012. Performance of counterweight balance on stability of undercut slope evaluated by physical modeling. J.Geotechnical Engineering Res 6:2 193-205.

[3] Itasca Consulting Group, 2016. 3DEC 3dimensional distinct element code user’s guide. USA: Itasca Consulting Group, Inc.

[4] Dowling, N. E., 2012. Mechanical Behavior of Materials. England: Pearson Education Limited.

[5] Brady, B. H. G. & Brown, E. T., 2004. Rock Mechanics for underground mining. United States of America: Springer Science + Business Media, Inc.

[6] Altenbach, H. & Naumenko, K., 2006. Modeling of creep for structural analysis. s.l.:Springer Berlin Heidelberg New York.

[7] Goodman, R. E., 1989. Rock mechanics second Edition. Canada, 202-210.

[8] Wgllie, D. C. & Mah, C. W., 2005. Rock slope engineering civill and mining 4 th edition. New York: Taylor & Franics e-Library.

[9] Das, B.M, 1984. Fundamentals of Geotechnical Engineering. United States: Chris carson.

[10] Ukritchon, Ouch, R., B. & Pipatpongsa, T., 2017. Investigation of Stability and Failure Mechanism of Undercut Slopes by Three-Dimensional Finite Element Analysis. KSCE journal of Civil Engineering, 4 August
เผยแพร่แล้ว
2020-07-09
How to Cite
[1]
Dul, L. และ Leelasukseree , C. 2020. Standup time estimation of undercut moist sand slope using numerical simulation. การประชุมวิชาการวิศวกรรมโยธาแห่งชาติ ครั้งที่ 25. 25, (ก.ค. 2020), GTE36.
สาขาของบทความ
วิศวกรรมปฐพี