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Introduction: Slopes either occur naturally or are engineered by humans.PowerPoint Presentation

Introduction: Slopes either occur naturally or are engineered by humans.

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- Introduction:
- Slopes either occur naturally or are engineered by humans.
- An understanding of geology, hydrology, and soil properties is central to applying slope stability principles properly.
- Analyses must be based upon a model that accurately represents site surface conditions, ground behavior, and applied loads.
- Type of Analysis

- Aim of slope
- Assess the stability of slopes under short-term
- Assess the possibility of slope failure / satbility
- Understand failure mechanisms and the influence
- Enable the redesign of failed slopes and the planning and design
- The effect of seismic loadings on slopes
- Safe and economic design of excavations, embankments, earth dams, landfills, and spoil heaps .

Geological discontinuities

Effect of Water

Geotechnical Properties of Material

Mining Methods

State of stress

Geometry slope:

Temperature

Erosion

Seismic effect

Vegetation

FACTORS AFFECTING SLOPE FAILURE

- Introduction
- Plane failure
- Wedge Failure:
- Toppling failure
- Rockfalls
- Rotational Failure

TYPES OF ROCK SLOPE FAILURE

- Planar Failure Analysis
- Sliding analysis of a block
- Plane failure analysis along a discontinuity
- Water is filled in discontinuities
- Tension crack present in the upper slope surface
- Tension crack present in the slope surface
- The tension crack is filled with water with upper slope angle
- Effect of rock bolts

- Wedge Failure Analysis
- Analysis of wedge failure considering only frictional resistance
- Analysis of wedge failure with cohesion and friction angle

- Toppling Failure Analysis
- Kinematics of block toppling failure
- Limit equilibrium analysis for toppling failure
- Stability analysis of flexural toppling

Rock Slope Stability Analysis: Limit Equilibrium Method

- Introduction
- Stability analysis of slope
- Stability analysis for Cohesionless Soil
- Total Stress Analysis (Swedish slip circle method)
- Ordinary slip circle method
- Bishop’s Simplified Method of Slices
- General Method of slices

CIRCULAR FAILURE ANALYSIS

- Introduction
- Continuum modeling
- Discontinuum Modeling
- Hybrid approach

- Important considerations
- Continuum versus discontinuum models
- Selecting appropriate zone size
- Initial conditions
- Boundary conditions
- Water pressure
- Excavation sequence

- Important failure indicators in slope analysis
- Factor of Safety
- Unbalanced Force
- Gridpoint Velocities
- Plastic Indicators
- Displacement
- Failure Surface

SLOPE STABILITY ANALYSIS BY NUMERICAL MODELLING

- Introduction
- Common terms used in simulation of water
- Important Geotechnical properties related to water
- Permeability
- Hydraulic Conductivity
- Factor affecting soil permeability and hydraulic conductivity
- Matrix suction
- Consistency of soil

- Pore Pressures
- Infiltration
- Rainfall Infiltration Model.
- Simulation of water

STABILITY ANALYSIS IN PRESENCE OF WATER

Types of seismic wave

Dynamic Soil Properties

Field Measurements of Dynamic Modulus

Ground Motion Estimates

Factors Affecting Ground Motion:

Simulation of seismic effect

Pseudo-static approach

Wedge Method

Method of Slices

Inertia Slope Stability – Newmark Method

SEISMIC ANALYSIS

- Introduction
- Removal And Repair
- Excavation & repair
- Catchment & Wire Netting
- Grading & Serrating
- Benching
- Resloping and unloading
- Lightweight Fill
- Counterberms
- Trimming
- Shear Keys
- Scaling

- Drainage and Water Control
- Surface Drainage
- Subsurface Drainage

SLOPE STABILIZATION

- Stabilization Through Support
- Steel reinforcement
- Rock anchor
- Rock Bolts
- Rock Dowels
- Soil Nailing
- Piles
- Geosynthetic Reinforcement

- Retaining Walls
- Gravity Walls
- Cantilever Retaining Walls
- Sheet Piling Retaining Walls
- Anchored retaining wall
- Gabions

- Other Methods For Stabilization
- Grouting and Shotcrete
- Vegetation

- Introduction
- Slope failure mechanism
- Types of Slope Movement
- Initial response
- Regressive and progressive movement
- Long-term creep

- Sub-Surface Monitoring Methods
- Borehole probes
- Time–domain reflectometry
- Inclinometers
- Extensometers

SLOPE MONITORING: TECHNIQUES AND INSTRUMENTS

- Measurement of water level and pressure
- Standpipe Piezometer
- Pneumatic Piezometer
- Vibrating Wire Piezometer

- Surface Monitoring Methods
- Crack Monitors
- Surveying
- Photographic Image Analysis
- Total Station
- Global positioning system (GPS)
- Acoustic emission technique
- Laser image scanning system
- Slope Stability Radar system
- Synthetic aperture radar

- Introduction
- Slope Failure
- Slumps
- Rock Falls and Debris Falls
- Rock and Debris Slides

- Sediment Flows
- Solifluction
- Debris Flows
- Mudflows
- Creeps
- Earthflows

- Debris Avalanches
- Historical landslides (wiki )
- Major factors affecting landslides

landslides

- Introduction
- Method of Construction in lift section
- Methods of Stability Calculation
- Shear Strength of dump material
- Particle shape, roundness and grain surface texture
- Effect of moisture condition on shear strength

- Factors Affecting Dump Stability
- Dump Configuration
- Foundation Conditions
- Dump Material Properties
- Dumping method
- Dumping Rate
- Seismicity and Dynamic Stability
- Topography
- Dump drainage

Mine Waste Dump

- Material properties and testing
- Bulk Gradation
- Plasticity of Fines
- Index Properties and Classification
- Hydraulic Conductivity
- Consolidation
- Strength
- Mineralogy and Soil Chemistry
- In Situ Density
- Compaction

- Failure Modes in tailing dams
- Rotational Sliding
- Foundation Failure
- Overtopping
- Erosion
- Piping
- Tailings Impoundment Design
- Mill Location
- Topography
- Geology and Ground Water
- Tailings impoundments
- Tailings storage facilities

- Methods for Tailings Disposal
- Upstream Method
- Downstream Method
- Centerline Method

Tailing Dam

Probabilistic Design Methods

Reliability Analysis

Sensitivity, probability and reliability analysis

Slope Mass Rating (SMR)

Chinese Slope Mass Rating System (CSMR)

Rock slope rating (RSR)

Slope stability rating (SSR) classification system

Dump mass rating

Classification systems in slope stability analysis

Fuzzy Inference System

Introduction of softcomputing approach in slope stability

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