A OPEN PIT MINING AÇIK OCAK MADENCİLİĞİ

23 rd
3.7 Results and Discussion
The volumetric strains are higher than 10 -3
which is the field of the great deformations
what confirms than the open pit mine course
a risk of instability (Figure 9).
valuable for the insurance of the results. The
geotechnical study and the intervention of
the geotechnician are necessary and even
obligatory for the risk prevention in the
mining field.
Figure 9. Volumetric strains.
Failures appear more on the level of the
marl’s layer which proves that this layer
can’t support the weight of the overlying
strata. The maximum values are concentrated
especially on the level of the toe of slope.
Figure 11. Shear strains
REFERENCES
Bieniawski, Z. T. (1976). Engineering classification
in rock engineering. In: Proceedings of the
Symposium on Exploration for Rock
Engineering, Johannesburg, 97-106.
Bieniawski, Z. T. (1989). Engineering rock mass
classification. John Wiley & Sons, New York,
251 p.
Coates, D. F. (1981). Rock Mechanics Principles.
CANMET, Energy, Mines end Resources.
Canada, Monograph 874. pp. 6-1 – 6-70; B-1 – B-
12.
Edelbro, C. (2003). Rock mass strength, a review.
Technical report. Luleå university of technology,
160 p.
Romana, M. (1985). New adjustment ratings for
application of Bieniawski classification to slope.
In: Proceedings of the international Symposium
on the Role of Rock Mechanics, 49-53.
Romana, M. (1993). A geomechanical classification
for slopes: Slope mass rating. In: Comprehensive
Rock Engineering. Principles, Practice &
Projects, Oxford: Pergamon Press, 3 (Rock
Testing and site characterization), 575-600.
Sjöberg, J. (1996). Large scale slope stability in open
pit mining – a review. Technical report. Luleå
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Steffen, O.K.H. & al., (1970). Optimization Open Pit
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3.8 Conclusion
The alliance of several natural and human
factors led to the landslide of Kef Essenoun.
In the case of the stable slopes, it is
impossible to envisage their lifetime
quantitatively. One thus seeks to evaluate
qualitatively the probability that the slope
becomes unstable. Important progress could
be realized in this field, thanks to the
analysis of the passed landslides.
The empirical approach can only be used on
the level of predimensioning or constitute a
starting point of a mechanical study. The use
of several analysis approaches is very
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