The Influence of Shales on Slope Instability

Stead, Doug

doi:10.1007/s00603-015-0865-0

Cited by 22 publications

(9 citation statements)

References 38 publications

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“…Additional work should be undertaken on the simulation of the clay shales behavior, reproducing more closely the erosion processes and the stresses acting on the surficial layer of this unit. The monitoring of the displacements in this unit and the use of more suitable constitutive criteria, to describe the effects of time and strain-dependent softening effects on overconsolidated clays (Yoshida et al, 1990;Stead, 2016), may help to better constrain the slope failure.…”

Section: Discussionmentioning

confidence: 99%

“…Detailed slope investigations are still lacking in the field of lateral spreads and related landslides (Pasuto and Soldati 2013) and more research is required on the stability of slopes in weak rock masses (Picarelli, 2015;Stead, 2016). In this context, our work attempts to unravel the mechanisms driving the development of secondary toppling phenomena at the edges of rocky plateaux.…”

Section: Introductionmentioning

confidence: 99%

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An investigation into the development of toppling at the edge of fractured rock plateaux using a numerical modelling approach

et al. 2017

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The version presented here may differ from the published version. If citing, you are advised to consult the published version for pagination, volume/issue and date of publication An investigation on the development of toppling phenomena at the edge of fractured rock plateaux using a numerical modelling approach Margherita Cecilia Spreafico (a) , Federico Cervi (a) , Mirko Francioni (b) , Doug Stead (c) , Lisa Borgatti (a) a.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

An investigation into the development of toppling at the edge of fractured rock plateaux using a numerical modelling approach

et al. 2017

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“…Affected by the natural environment, the slopes in the study area are deeply cut in the longitudinal direction and are prone to surface movement and deformation. For the special geological structure in the loess gullies, the slope stability G serves as an index of the terrain mining conditions [45][46][47][48]. e slope stability can be expressed in terms of the main influencing factors as follows:…”

Section: Evaluation Of Land Destruction In the Mining Areamentioning

confidence: 99%

“…e slope angle is 25°, the slope height is 30 m, the soil density is 1700 kg/m 3 , the slope cohesion is 10 kPa, and the internal friction angle is 16°. In order to fully analyze the effects of different influencing factors, five factors and three levels are selected for calculation [45][46][47][48]. e value range of each factor is divided into three levels (see Table 1).…”

Section: Evaluation Of Land Destruction In the Mining Areamentioning

confidence: 99%

The Formation Mechanism of Surface Landslide Disasters in the Mining Area under Different Slope Angles

Zhao

Zhang

et al. 2021

Advances in Civil Engineering

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Slope stability analysis is important for the safe mining of mineral resources. The collapse of goafs in loess gullies can lead to natural disasters such as surface landslides. In this context, this study analyzes monitoring data obtained from surface observation in the Shendong mining area of the Hanjiawan coal mine based on the geological conditions therein. The monitoring results show that the working face experiences a starting period, an active period, and a declining period, from the start of mining to the end of the working face. At the initial mining stage, there is no evident surface movement or deformation in the mining area. When the advance distance of the 12106 working face is between 13 m and 109 m, the surface movement and deformation vary significantly, and the maximum subsidence reaches 1963 mm, which is enough to cause landslides. We select the physical and mechanical parameters of the rock and soil in the mine and then simulate the formation mechanism of surface landslides under different slope angles of the mining area using FLAC3D software. Because of the collapse of the mined-out area, the overlying strata structure is destroyed, the subsidence basin is shifted to the center as a whole, and the slope mass is subjected to tensile and compression deformation, resulting in plastic damage, which develops downward along the crack and leads to a collapse because of the discontinuous movement and deformation of the surface; moreover, step-type ground fissures are produced. The results also show that when the slope angle is greater than 60°, the displacement of the slope mass is not uniform, and the rock stratum in a position with large displacement loses its support, leading to landslides; when the slope angle is less than 30°, the bedrock surface forms a sliding surface and develops to the surface, thus decreasing the possibility of landslides. Based on the stability analysis of the collapsed slope in the goaf of the loess gully, a scientific basis is provided for the effective prevention and control of geological disasters in the Shendong mining area.

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“…The failure at the mine was apparently triggered by a planar release along a structural bedding that dips 20˚ -30˚ northwest which is the only section of the mine with a layered (anisotropic) rock mass [11] [12]. Thus, from the initiation of the mining projects, it is crucial to undertake a robust stability evaluation and design to better understand the rock mass, and methods of analysis that can model the rock mass and take into account variability in all of the geotechnical parameters [13].…”

Section: Introductionmentioning

confidence: 99%

Rock Slope Stability Analysis by Using Integrated Approach

Moses¹,

Shimada²,

Sasaoka³

et al. 2020

WJET

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Slope stability assessment is an essential aspect of mining and civil engineering. In this study, Songwe open-pit mine in Malawi was investigated to establish possible pit slope instability. In performing the analysis, an integrated approach entailing rock mass characterisation, kinematic and numerical methods were applied. Based on rock mass classification system, Songwe Hill carbonatite rock mass is characterised as a good rock but still it possesses numerous random discontinuities that present a complex challenge in geotechnical engineering. Dip 6.0 software was used in carrying out kinematic analysis based on the attributes of discontinuities. The results show that there is a 16% likelihood of planar failure in the divided slope sections of the planned pit. Thus, slope angle optimisation to 41˚ has been proposed as a counter-measure to minimise the potential risk of planar failure. At the optimised angle, the risk of planar failure could be reduced by 44%. On the other hand, wedge failure was found to be improbable since no joint intersections were found in the critical zone of potential failure. For numerical analysis, finite element code was applied using FLAC 3D 5.0 application. The results demonstrate that overall slope angle of 41˚ would offer a favourable balance between safety and mining economics as mining operations progress to deeper horizons thereby avoiding a costly push back solution due to instability.

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The Influence of Shales on Slope Instability

Cited by 22 publications

References 38 publications

An investigation into the development of toppling at the edge of fractured rock plateaux using a numerical modelling approach

An investigation into the development of toppling at the edge of fractured rock plateaux using a numerical modelling approach

The Formation Mechanism of Surface Landslide Disasters in the Mining Area under Different Slope Angles

Rock Slope Stability Analysis by Using Integrated Approach

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