Analysis of massif fracturing during Deep-Seated Gravitational Slope Deformation by physical and numerical modeling

Bachmann, D.; Bouissou, S.; Chemenda, A.

doi:10.1016/j.geomorph.2007.09.018

Cited by 40 publications

(17 citation statements)

References 22 publications

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“…2). This hypothesis is also supported by the results of analogue modelling (Bachmann et al 2009). Lugeon & Oulianoff (1922) have described the role of gravity-induced deformations on rock outcrops ( Fig.…”

supporting

confidence: 61%

Slope tectonics: a short introduction

Jaboyedoff

Crosta

Stead

2011

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Geomorphology, structural geology and engineering geology allow description of the main characteristics of a slope in distinct ways that can be combined to provide a complementary view of the operative slope processes. The subjects presented in this Special Publication include: slope morphology and evolution; mechanical behaviour of the material; modes of failure and collapse; influence of lithology and structural features; and the role played by controlling factors. This Slope Tectonics volume comprises a series of very different contributions that attempt to underline a multidisciplinary approach that should form the framework of slope instability studies.Slope Tectonics is adopted in this volume to mean deformation that is induced or fully controlled by the slope morphology and that generates features that can be compared to tectonic features. The stress field in a slope is the result of gravity, topography and the geological setting created by an ensemble of geodynamic processes. Active tectonics (also called neotectonics) generates a stress field that can control slope processes; a strong feedback existing between geological history, tectonics, lithology, geomorphological evolution and topography.As a consequence, a list of factors and their relative influence can be presented.

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supporting

confidence: 61%

Slope tectonics: a short introduction

Jaboyedoff

Crosta

Stead

2011

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“…However we need to stress that, in the above cases, low-angle reverse faults have been consistently observed, different from what is seen in our trenches where slip planes subjected to reverse motions are steeply dipping. Low-angle reverse slip planes and other contractional structures such as folds have been recognised at the toe of DSGSDs by Mahr and Nemčok (1977), Savage and Varnes (1987), Chigira (1992), Hermann et al (2000), Baron et al (2004), and Hippolyte et al (2006).…”

Section: Inversion Kinematicsmentioning

confidence: 97%

“…These phenomena have been intensively studied by several authors in terms of their geomorphological features (Mahr, 1977;Dramis and Sorriso-Valvo, 1994;Tibaldi and Viviani, 1999;Rohn et al, 2004) and geotechnical properties (Braathen et al, 2004;Pellegrino and Prestininzi, 2007), through numerical modelling (Forlati et al, 2001;Baron et al, 2005;Hürlimann et al, 2006;Ambrosi and Crosta, 2011;Apuani et al, 2013), analogue modelling (Chemenda et al, 2005;Bachmann et al, 2009), radar interferometry (Tarchi et al, 2003;Antonello et al, 2004;Saroli et al, 2005), structural methods (review in Stead and Wolter, 2015), and geophysical methods (Ferrucci et al, 2000;Meric et al, 2005;Pánek et al, 2009). In order to improve the hazard assessment of DSGSDs, the reconstruction of their kinematics is of paramount importance to gain a better knowledge of their evolution and expected ground deformation.…”

Section: Introductionmentioning

confidence: 99%

Inversion kinematics at deep-seated gravity slope deformations revealed by trenching techniques

Mariotto

Tibaldi

2016

Nat. Hazards Earth Syst. Sci.

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Abstract. We compare data from three deep-seated gravitational slope deformations (DSGSDs) where palaeoseismological techniques were applied in artificial trenches. At all trenches, located in metamorphic rocks of the Italian Alps, there is evidence of extensional deformation given by normal movements along slip planes dipping downhill or uphill, and/or fissures, as expected in gravitational failure. However, we document and illustrate -with the aid of trenching -evidence of reverse movements. The reverse slips occurred mostly along the same planes along which normal slip occurred, and they produced drag folds in unconsolidated Holocene sediments as well as the superimposition of substrate rocks on Holocene sediments. The studied trenches indicate that reverse slip might occur not only at the toe portions of DSGSDs but also in their central-upper portions. When the age relationships between the two deformation kinematics can be determined, they clearly indicate that reverse slips postdate normal ones. Our data suggest that, during the development of long-lived DSGSDs, inversion kinematics may occur in different sectors of the unstable rock mass. The inversion is interpreted as due either to locking of the frontal blocks of a DSGSD or to the relative decrease in the rate of downward movement in the frontal blocks with respect to the rear blocks.

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“…The building of cumulative sum sequences has been expressed in detail by Wu et al 26 According to equation (4), the fractal dimension sequence can be determined as follows…”

Section: Fractal Modelmentioning

confidence: 99%

“…[1][2][3] This inevitably poses potential safety hazards from mining landslides during production. Although the monitoring of high slope mines has become an integral part of mining operations, 4 the accurate prediction of mine slope deformation is important to establish effective emergency strategies in advance to reduce economic losses and loss of human life. 5 Mathematical prediction models have been applied to forecast mine slope deformation.…”

Section: Introductionmentioning

confidence: 99%

An improved fractal prediction model for forecasting mine slope deformation using GM (1, 1)

Dong

Shi

et al. 2015

Structural Health Monitoring

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The forecasting slope deformation potential is required to evaluate slope safety during open-pit mining, allowing us to formulate and promote effective emergency strategies in advance to prevent slope failure disasters. Although fractal models have been used to predict slope deformation, such limitations as low prediction accuracy, poor stability and the requirement for large amounts of data must be overcome. This article proposes an improved fractal model to forecast mine slope deformation using the grey system theory. The GM (1, 1) model is used in the improved fractal model to optimize the fitting function of the fractal dimension because of its high computational efficiency and strong fitting ability. Data sequences spanning 13 days from 11 global positioning system monitoring stations in the Jinduicheng open-pit mine in Shaanxi Province, China, were applied to forecast the slope deformation. The results from both the traditional fractal model and the improved fractal model can accurately forecast the slope deformation value fairly close to the actual field monitoring value, but the latter can make a more accurate prediction than the former. There is a significant relationship between the prediction accuracy and the data sequence dispersion. Further analysis revealed that our improved fractal model is more capable of resisting the volatility existing in the data sequences than the traditional fractal model. These findings assist in understanding the applicability of prediction models and the deformation trends of open-pit mine slopes.

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Analysis of massif fracturing during Deep-Seated Gravitational Slope Deformation by physical and numerical modeling

Cited by 40 publications

References 22 publications

Slope tectonics: a short introduction

Slope tectonics: a short introduction

Inversion kinematics at deep-seated gravity slope deformations revealed by trenching techniques

An improved fractal prediction model for forecasting mine slope deformation using GM (1, 1)

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