Simulating a mining-triggered rock avalanche using DDA: A case study in Nattai North, Australia

Trong Nhan Do, Jian Hong Wu

Research output: Contribution to journalArticle

Abstract

This study numerically simulated the failure process of a mining-induced landslide at Nattai North, Australia. Results obtained using Discontinuous Deformation Analysis (DDA) matched the conceptual failure process suggested by local geologists and the observed maximum run-out distance. The maximum velocity of the sliding rocks exceeded 40 m/s. Computational results showed that the slope with inward sub-horizontal bedding planes and sub-vertical discontinuities remained stable if the mining-induced high principle stresses did not fracture the rocks near the slope toe. Failure of the rocks near the toe of the slope was a key causal factor in the subsequent landslide. This paper presents the first numerical simulation of the post-failure behavior of the mining-induced landslide at the Nattai North site. It also represents the first DDA simulation to clarify the chain reaction of a mining-induced landslide and demonstrate its applicability in such investigations.

Original languageEnglish
Article number105386
JournalEngineering Geology
Volume264
DOIs
Publication statusPublished - 2020 Jan

Fingerprint

rock avalanche
Landslides
landslide
Rocks
rock
bedding plane
sliding
simulation
discontinuity
analysis
Computer simulation

All Science Journal Classification (ASJC) codes

  • Geotechnical Engineering and Engineering Geology
  • Geology

Cite this

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abstract = "This study numerically simulated the failure process of a mining-induced landslide at Nattai North, Australia. Results obtained using Discontinuous Deformation Analysis (DDA) matched the conceptual failure process suggested by local geologists and the observed maximum run-out distance. The maximum velocity of the sliding rocks exceeded 40 m/s. Computational results showed that the slope with inward sub-horizontal bedding planes and sub-vertical discontinuities remained stable if the mining-induced high principle stresses did not fracture the rocks near the slope toe. Failure of the rocks near the toe of the slope was a key causal factor in the subsequent landslide. This paper presents the first numerical simulation of the post-failure behavior of the mining-induced landslide at the Nattai North site. It also represents the first DDA simulation to clarify the chain reaction of a mining-induced landslide and demonstrate its applicability in such investigations.",
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Simulating a mining-triggered rock avalanche using DDA : A case study in Nattai North, Australia. / Do, Trong Nhan; Wu, Jian Hong.

In: Engineering Geology, Vol. 264, 105386, 01.2020.

Research output: Contribution to journalArticle

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