Structural and geomorphological controls of the present-day landslide in the Moulares phosphate mines (western-central Tunisia)
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- 作者：Ferid Dhahri ; Ramdhane Benassi…
- 关键词：Landslides ; Deformation ; Seismotectonic activity ; Predisposition factors ; Triggering factors ; Phosphates mine
- 刊名：Bulletin of Engineering Geology and the Environment
- 出版年：2016
- 出版时间：November 2016
- 年：2016
- 卷：75
- 期：4
- 页码：1459-1468
- 全文大小：5,179 KB
- 刊物类别：Earth and Environmental Science
- 刊物主题：Earth sciences
Applied Geosciences
Structural Foundations and Hydraulic Engineering
Geoecology and Natural Processes
Nature Conservation - 出版者：Springer Berlin / Heidelberg
- ISSN：1435-9537
- 卷排序：75
文摘
Present-day deformations occurring within both waste dump and bedrock in the Northern Table mine of Moulares, western central Tunisia, show complex landslides of kilometric dimensions. Rock bodies in this mine slide due to the shear stress concentration along a complex sliding surface. As a result of gravity displacement, these rocks display diverse associate structures such as detachment, open fractures, folds, and striated thrust planes. Interaction between predisposition factors (inherited structures, topography, slope, gravity) and triggering factors (artificial vibrations and seismotectonic activity) provided favourable conditions for the sliding. Sloping fractured ground, marly lithology and meteoric water act further to exacerbate the instability in the ground and encourage rock failure. Additionally, the seismic hazard due to the sustained tectonic activity of the Gafsa fault and the vibrations due to explosive detonation can together trigger significant landslide movement.