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A.A.M. Dieudonné

24 records found

Towards Smarter Rock Breakage

A Framework for Blast Design in Sublevel Stoping Using Fuzzy Logic and Measure While Drilling Data

The depletion of shallow ore deposits is pushing the mining industry toward deeper underground operations, where efficient rock breakage remains a critical challenge. This thesis develops a mainly geotechnical, data-driven blast design framework for sublevel stoping in Boliden’s ...
This thesis investigates the effect of perforation strategies on CO2 injectivity in depleted gas fields used for Carbon Capture and Storage (CCS). Explored components of these strategies include the state of the wellbore upon perforation, the combination of shaped charge and gun ...

Modelling Backward Erosion Piping in Tidal Deposits

Including the fines fraction in the onset of motion criterion to model backward erosion piping below Groningen sea dikes

Backward erosion piping (BEP) is a common failure mechanism of dikes. Dikes are currently assessed on this mechanism with the Sellmeijer 2011 rule, a method based on experiments with homogeneous deposits. However, the presence of tidal fines positively influences the cohesive str ...
The dredging world is continuously growing, improving and adjusting to new challenges. As the demand for sustainable dredging practices grows and the availability of sand declines, the industry is increasingly exploring alternative materials, including fine-grained soils. This tr ...
Dikes are a primary defence against flooding from the rivers and sea in the Netherlands, but many no longer meet current safety standards. To ensure the dikes keep meeting the safety standards in the future, climate change will need to be taken into account. Increase in river dis ...
Unreinforced Masonry, a popular construction material with a rich historical legacy, has been resilient through centuries, despite its susceptibility to failure through various loading conditions such as seismic forces. Understanding the mechanical behaviour of masonry, particula ...
The soil-grout interface friction was measured to be in between 0.0 [kPa] and 14 [kPa]. To measure this friction, a special research method was invented that enabled a tunnel to be recreated. With this setup, any formation could be used. The formation could be created with a hole ...
High-level waste can be radiotoxic for thousands of years and should be carefully handled to prevent accidents. The research for geological disposal of radioactive waste focuses on the construction and durability of a geologic disposal facility in Dutch clays or salts. One of the ...
Eternal aftercare for landfills is the standard in Dutch waste management policy after a law came into effect in 1996, meaning eternal waste management from potentially hazardous substances. A prescription of this policy is the application of watertight barriers on top of the was ...
With changing climatic conditions, droughts are expected to increase in duration and intensity. Under drying conditions, desiccation cracks can form in clay soil, which is often used as dyke cover and in some cases also for the core of the dyke. These desiccation cracks have a po ...

Fluid Conductivity of Steady Two-Phase Flow in a 2D Micromodel

Analysis of a Representative 2D Percolation Model

Foams are used in reservoir engineering for enhanced oil recovery, CO2 sequestration and environmental remediation of aquifers and soils. One of the main mechanisms for foam generation at steady state is Roof snap-off. In some cases, mechanistic models of Roo ...

The erosion resistance of clay is an important aspect when assessing the integrity of a levee. This is because the clay layer of a dike must resist the forces that are imposed in the case of overflow or overtopping. Currently, the erosion resistance of clay in the Netherlands i ...

The unexpected softening of the undrained shear strength of organic and silty clays in Rhine delta: a conceptual study

Determining the Undrained Shear Strength of soft Dutch soils using conventional laboratory equipment

The current Dutch norms for the macro-stability of ood protection embankments and more specifically the determination of SHANSEP parameters has been subject of debate since its implementation in 2017. The main concerns arise from the apparent over-conservative nature of the guid ...
Geothermal energy reservoirs can be used as sources of renewable and sustainable energy. The concept of geothermal technology relies on the harvesting of heat from the deep rock by injecting fluid that circulates through the porous, fractured reservoir rock between the injection ...
Several waterway protection structures in the Netherlands dealt with rapid degrading armourstone after construction. This suggests that the current selection procedure of armourstones is not flawless to all degradation mechanisms, especially in dynamic environments. In this work ...

Preloading of a lumpy clay fill

A study into the closure of the interlump voids of a mechanically dredged stiff clay fill

Mechanical dredging of a stiff clay results in clay lumps. Those clay lumps can be reused for the construction of land reclamation projects, and hereby economic and environmental value is generated. Placement of the clay lumps
in water result in a matrix of clay lumps and an ...

Experimental analysis of passive acoustic emission, in particular the Kaiser Effect, under dynamic stress conditions

Exploring the implications for in-situ failure monitoring in underground mines

Irreversible damage induced by stress in brittle rock is accompanied by the formation of micro-cracks. The strain energy released during the fracturing process is released in the form of acoustic emission. This thesis applied the non-intrusive method of acoustic emission monitori ...
The heterogeneity of layered systems leads to variation in rock or soil mechanical properties, influencing the resistance to failure. A formation breaks by fracture propagation when the effective stress surpasses the formation strength. The propagation of a fracture through a mec ...
As the demand for green energy is growing, geothermal energy will play an important part in the future energy mix. Geothermal energy is widely used for both direct-use and electricity generation. A viable geothermal reservoir must have a sufficiently high temperature, a fluid pat ...