Stability of the rock block system involved in the Jiweishan landslide in China

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

The objective of the paper is to investigate the initiation of the Jiweishan landslide by simulating the field geological conditions around and inside a selected critical rock block and then to study its stability through 3-D discontinuum stress analysis. The study led to the following main conclusions: (i) The mining excavations that occurred underneath the investigated block at the landslide site, the friction angle of T2 discontinuities and sliding plane, and the dip angle of the sliding plane seem to be the most important factors with respect to the instability of the investigated block, (ii) It seems that the inction angle of T2 discontinuities and sliding plane need to drop to a value between 5° and 10° for the investigated block to be unstable. This means that rainfall and karstification have played important roles in reducing the said friction angle and contributed to the failure of the investigated block, (iii) The northern part of the investigated block (key block) had moved out first from the top of the mountain in a direction parallel to the strike of the north boundary discontinuity plane (T2) and had undergone shear failure on the T2 surface as well as on a weak shale layer (the sliding plane) and the remaining part of the investigated block (driving block) had moved in a NNE direction and had undergone shear failure on the sliding plane and separation from southern and western boundary discontinuity planes (TO and Tl) to fill the empty space created by the key block to initiate the Jiweishan landslide.

Original languageEnglish (US)
Title of host publication49th US Rock Mechanics / Geomechanics Symposium 2015
PublisherAmerican Rock Mechanics Association (ARMA)
Pages3110-3125
Number of pages16
Volume4
ISBN (Print)9781510810518
StatePublished - 2015
Event49th US Rock Mechanics / Geomechanics Symposium - San Francisco, United States
Duration: Jun 29 2015Jul 1 2015

Other

Other49th US Rock Mechanics / Geomechanics Symposium
CountryUnited States
CitySan Francisco
Period6/29/157/1/15

Fingerprint

rock block
landslides
Landslides
sliding
landslide
China
Rocks
rocks
discontinuity
Friction
Shale
Stress analysis
Excavation
friction
Rain
shear
excavation
stress analysis
mountains
karstification

ASJC Scopus subject areas

  • Geophysics
  • Geochemistry and Petrology

Cite this

Kulatilake, P., & Ge, Y. F. (2015). Stability of the rock block system involved in the Jiweishan landslide in China. In 49th US Rock Mechanics / Geomechanics Symposium 2015 (Vol. 4, pp. 3110-3125). American Rock Mechanics Association (ARMA).

Stability of the rock block system involved in the Jiweishan landslide in China. / Kulatilake, Pinnaduwa; Ge, Y. F.

49th US Rock Mechanics / Geomechanics Symposium 2015. Vol. 4 American Rock Mechanics Association (ARMA), 2015. p. 3110-3125.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Kulatilake, P & Ge, YF 2015, Stability of the rock block system involved in the Jiweishan landslide in China. in 49th US Rock Mechanics / Geomechanics Symposium 2015. vol. 4, American Rock Mechanics Association (ARMA), pp. 3110-3125, 49th US Rock Mechanics / Geomechanics Symposium, San Francisco, United States, 6/29/15.
Kulatilake P, Ge YF. Stability of the rock block system involved in the Jiweishan landslide in China. In 49th US Rock Mechanics / Geomechanics Symposium 2015. Vol. 4. American Rock Mechanics Association (ARMA). 2015. p. 3110-3125
Kulatilake, Pinnaduwa ; Ge, Y. F. / Stability of the rock block system involved in the Jiweishan landslide in China. 49th US Rock Mechanics / Geomechanics Symposium 2015. Vol. 4 American Rock Mechanics Association (ARMA), 2015. pp. 3110-3125
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