Slope stability is an important aspect of geotechnical engineering. Input
parameters for the analysis are the governing factors and they must be determined
accurately and precisely. Field investigations, laboratory testing and back analyses
are vital instruments for the input parameters.
This study presents the results of slope stability analysis for the soil slopes at
Elbistan-Ç / ö / llolar lignite mine. After executing the drilling programme, samples
taken from the drilling work, delivered to soil mechanics laboratory for testing.
The basic input parameters, namely cohesion and friction angle determined at soil
mechanics laboratory were compared to the parameters obtained from back
analysis of a large scale slope failure. Input parameters for the analysis are
determined by this way.
After determining the input parameters, slope stability analyses were carried out
both for the permanent and temporary slopes in AfSin-Elbistan lignite basin,
Ç / ö / llolar sector. The effect of ground water on the stability of slopes was
investigated in detail and maximum safe slope angles were determined for
different water levels. For limit equilibrium analysis, Rocscience SLIDE software, for finite difference analysis in 3-D, Itasca FLAC3D was used. In the limit
equilibrium analyses both circular and composite failures were considered. Shear
strength reduction method is used for the finite difference method. The results
between limit equilibrium and 3-D finite difference methods were compared.
When the failure surfaces obtained from the finite difference analyses were
imposed to limit equilibrium analysis, computations are resulted in lower factor of
safety values for limit equilibrium analysis.
| Identifer | oai:union.ndltd.org:METU/oai:etd.lib.metu.edu.tr:http://etd.lib.metu.edu.tr/upload/12609939/index.pdf |
| Date | 01 September 2008 |
| Creators | Oge, Ibrahim Ferid |
| Contributors | Karpuz, Celal |
| Publisher | METU |
| Source Sets | Middle East Technical Univ. |
| Language | English |
| Detected Language | English |
| Type | M.S. Thesis |
| Format | text/pdf |
| Rights | To liberate the content for public access |
Page generated in 0.0017 seconds