WorldCat Identities

Al-Heib, Marwan

Overview
Works: 15 works in 18 publications in 2 languages and 20 library holdings
Roles: Thesis advisor, Opponent, Author
Publication Timeline
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Most widely held works by Marwan Al-Heib
Etudes expérimentales et numériques du comportement des structures en Pisé et en maçonnerie : Apport de la MED by Julie Al-Hout( Book )

2 editions published between 2016 and 2019 in French and held by 2 WorldCat member libraries worldwide

This contribution, based on experimental work and numerical modeling using the distinct elements method, aims to study masonry structures and rammed earth structures. For the masonry part, our study first deals with reduced models tested on tilting table, then in a second time we tested brick walls on a representative scale. In the second part, we conducted tests on rammed earth walls under a shear loading, with or without axial prestressing of the containment which corresponds to a descent of load. Numerical modeling using the discrete element method has been carried out for these different case studies. The comparison between the experimental and numerical results, allowed us to evaluate the relevance and limits of modeling via the discrete element method (DEM)
Modélisation physique du renforcement par géosynthétique des remblais granulaires et cohésifs sur cavités by Mouhamad Hassoun( )

1 edition published in 2019 in French and held by 2 WorldCat member libraries worldwide

The French underground is occupied by a considerable number of natural or anthropogenic underground cavities: former mining areas, quarries, karsts, tunnels and abandoned civil structures, etc. These cavities are the source of various risks of ground movements such as sinkholes and subsidence which can have a large impact on the safety people and structures or infrastructures. In order to reduce this risk, a reinforcement of the embankments by geosynthetic in the zones of potential cavities can be implemented. In this context, the thesis has been funded and managed by INERIS (research project EREVAN - Evaluation and Reduction of the Vulnerability of the properties exposed to the natural and mining Hazards), in partnership with 3SR laboratory. One of the objectives of this research is in particular to better understand, further to the opening of an underlying cavity, the behavior and the mechanisms of collapse of reinforced embankment, especially in the case of cohesive soil, in order to optimize its design.As a part of this work, various experiments on physical models in laboratory and on site have been realized. The results obtained in laboratory allowed to determine the behavior of the geosynthetic reinforcement following the collapse of a granular or/and cohesive embankment over a cavity, an important experimental database has thus been established. Full scale experiment allowed to validate the technical, economic and environmental benefits of geosynthetic reinforcement of zones subject to sinkhole.The particular contribution of this work is in the use of original physical models and measurement techniques used to simulate the occurrence of a sinkhole and follow in an accurate quantitative way the involved mechanisms, notably in the case of a cohesive backfill. In particular, a specific evaluation of load transfer mechanisms and soil - geosynthetic reinforcement interaction due to sinkhole has been enabled by the development and the validation of an image processing technique. The intensity of the load transmitted by the ground onto the geosynthetic reinforcement, the geometry of its distribution, as well as its evolution due to possible overburden load have been specifically investigated.Experimental results have been compared with analytical formulations resulting from existing design methods in the literature. This comparison allowed us to better define the domains of validity of the current analytical methods for design of geosynthetic reinforcement whether for granular or cohesive backfill, and in certain cases to formulate some recommendations
Les nouvelles méthodes de modélisations numériques et le volume d'influence des exploitations minières en conditions complexes by Marwan Al-Heib( Book )

2 editions published in 1993 in French and held by 2 WorldCat member libraries worldwide

Sous la terminologie pressions de terrains se regroupent les principaux soucis des exploitants. Les mines de plus en plus profondes et les conditions d'exploitation de plus en plus difficiles. De plus, afin d'améliorer la productivité imposée par les contraintes économiques, la largeur des tailles est augmentée. Pour pouvoir agir et prévoir le comportement des terrains dans de telles conditions, les aspects pratique et méthodologique de la question sont abordés. Un panorama complet a été présenté en rappelant les résultats des études et les règles précédentes. Deux approches de modélisation sont employées: la modélisation classique et une modélisation évolutive. La modélisation porte sur le mode de traitement taille remblayée ou foudroyée, largeur importante, tenseur des contraintes initiales et stratification. Une modélisation par phases a été développée pour tenir compte de l'évolution de chantier, et a été appliquée pour connaitre le comportement d'un pilier. La méthode des éléments distincts est employée pour modéliser le comportement du foudroyage, une validation du modèle est établie entre l'affaissement calculé par le modèle et les mesures d'affaissement réalisées in situ. Enfin, des études de cas réels des houillères du bassin de lorraine et des houillères de Provence ont été réalisées. La modélisation numérique s'avère être un outil indispensable pour la planification des chantiers et pour l'établissement des règles de pressions de terrains adaptées
Étude de stabilité de fontis au toit des carrières souterraines et traitements apportés aux conséquences induites en surface by Atallah Abbass Fayad( Book )

2 editions published in 2004 in French and held by 2 WorldCat member libraries worldwide

The objective of the thesis is to improve the methods used to forecast of the sinkhole risk We studied the mechanisms as well as the evolution of the collapse processes the covering. Work based on the analysis of the well documented cases. A pragmatic and operational methodology was developed, to predict the risk of subsidence. It includes: 1. a numerical approach reserved for complex or exposed cases (including presence of major works, faults, water, seismity or dynamic heads). It is also recommended to improve the analytical method; 2. an analytical approach improved based on the theory of beams, able to take into account the elastoplastic behaviour of the recovery, the faults propgations, stifness and the bedding plane opening A parametric studies were led to analyse the failure according to the density of beds at the roof, the mechanical properties, the state of stress and the rigidity of the worked seam, etc
Evaluation des dommages induits par des mouvements de terrain sur des structures en maçonnerie à l'aide de la modélisation physique by Huu-Luyen Nghiem( )

1 edition published in 2015 in French and held by 2 WorldCat member libraries worldwide

Masonry structures present a significant proportion of individual houses and are especially more vulnerable when subjected to ground movements. To deal with consequences of this problem, a test-platform has been developed in order to simulate ground movements and their effect on structure models on the surface. This thesis is based on a reduced physical model and develops damage assessment methods for masonry structures using physical modelling. Firstly, a small-scaled physical model under Earth's gravity (1g) has been developed to reproduce this phenomenon. This model of soil-foundation-masonry interaction has a scale factor of 1/40. The analogue soil consists of the Fontainebleau sand. The foundation part of the structure is made of liquid silicon and masonry walls are made from small wooden blocks. To measure displacements fields of the soil and the structure, a digital image correlation (DIC) technique is used. Discussions about the use of this technique when performing a test, especially the consideration of measurement errors, are also addressed. Secondly, we first assess the damage through conventional methods based on damage indicators and graphs. Then, new easy to use tools based on the DIC technique are proposed to carry out a more effective damage assessment. The first tool helps identify failure modes in the structure, based on the Winkler soil-structure interaction model. To do this, the inverse problem of soil-structure interaction is resolved, and the failure modes, based on internal forces, are identified. Then, a DIC-M model is proposed to reproduce the crack propagation in the masonry wall. The key point of this model consists in the simulation of the block movements in a discrete element system (DES). Consequently, cracks can appear easily, and then the crack identification and quantification become easier. More precisely, a new damage indicator related to the cumulated length of cracks allows to better quantify the damage and the cartography the cracks. The measurement uncertainty is determined by Monte-Carlo simulation. Thirdly, the performance of proposed tools is discussed through an example of assessing potential damages. An individual house in masonry subjected to ground movements was studied using physical experimentation. A test campaign related to the most sensitive positions of the structure with respect to the subsidence centre is performed. Damage assessment is conducted using deformation measurement and crack characteristics. The comparison between conventional and developed methods shows the relevance of the damage indicator related to the cumulated length of cracks, and this indicator can be considered as a new tool for damage assessment in practice. Finally, operational recommendations are suggested in order to obtain a better estimation of the damage level of the structure
Étude de la vulnérabilité des bâtiments en maçonnerie soumis à des mouvements de terrains et élaboration de critères d'évolution de leur rigidité by Jamil Serhal( )

1 edition published in 2016 in French and held by 1 WorldCat member library worldwide

The main purpose of this research is the assessment of the damage of masonry buildings undergoing differential settlements. This contribution, which is based on numerical modeling, analytical methods and experimentation, aims for a better understanding of the behavior of masonry structures. The treated issue may be applied in different engineering fields, as for example the case of buildings located in tunneling areas or in areas suffering land subsidence. The bibliography survey presents a diversity of methods to categorize the damage of buildings undergoing settlement. This variety of methods, parameters and thresholds used to qualify the severity of the damage, prompted us to study the consistency of these methods, and the effect of the properties of masonry buildings - undergoing ground movements - on proposed threshold values. A sensitivity analysis on building properties is implemented in order to propose thresholds values intervals that depend on buildings properties. This uncertainty is then taken into account with the development of fragility curves that aim quantifying the damage in terms of probability according to a typology of buildings. In addition, the stiffness of buildings undergoing ground movements plays a very important role in studying the phenomenon of soil-structure interaction. However, the evolution of the stiffness of the damaged building due to settlements is not investigated in the literature. Numerical modeling (UDEC) is used to develop a methodology for the study of the stiffness variation of masonry buildings in relation to he settlement suffered by the structure. Analytical formulations are proposed to relate the reduction of the stiffness of the buildings with regard to the suffered settlement, and depending on the buildings properties. Some experimental tests are performed to validate the numerical methodology. Finally, the two mains results are 1) improvement in the assessment of buildings damage with the drawn of fragility curves and 2) the numerical methodology to formulate the changes in the stiffness of masonry buildings according to the suffered settlement, and according to their properties
Modélisation explicite de l'initiation et la propagation de fractures by Jabrane Khalil Hamdi( )

1 edition published in 2017 in French and held by 1 WorldCat member library worldwide

The study of rock mass behavior requires the understanding of their response under various loadings. The study of rock damage from an energetic point of view is essential in order to predict dynamic phenomena. These phenomena are due to the development of cracks in rocks subjected to strong initial and induced stresses. Fracturing is a form of energy dissipation that restores the balance of the involved medium. The aim of the thesis is to model rock cracks and study the behavior of underground structures at great depths. The development of models able to simulate the fracturing, the coalescence of cracks and their interaction with pre-existing fractures is essential. In the literature, there are two main theoretical and numerical approaches for crack modeling: continuous and discrete. A detailed analysis of these approaches has led us to choose the discrete approach and more particularly the code Yade. This code enables to simulate explicitly cracks propagation with or without pre-existing fractures. Developments have been made to evaluate the different forms of energy involved in rock behavior. In particular, a correlation between the cracks energy determined numerically and the microseismic activity observed in laboratory samples has been performed. The various energy components developed and then implemented in Yade are: external work, potential energy, elastic energy, friction energy, cracks energy, kinetic energy and damping energy. Validation of the energy approach was carried out by simulating laboratory tests. The evolution of the various energy components permits to verify that the energy balance is correctly evaluated. The energy balance was also verified at a structure scale by simulating the underground excavation of a Mine-by Experiment (URL Manitoba). The extension of the damaged zone induced by excavation and predicted by numerical simulations was compared with that observed in-situ around the Mine-by Experiment. It has been found that the predicted and the observed damage are similar in the directions of initial minor and major initial stresses. In addition, the energy formulation enables to study numerically the fracturing process of rocks. Wassermann (2006) performed uniaxial and triaxial compression tests on samples of iron ore from Lorraine. We have modeled these tests. The qualitative comparison of acoustic events and cracks energies determined from tests and numerical simulations showed similar trends. On the other hand, the quantitative comparison showed that the number of numerical acoustic events is greater than the number of experimental acoustic events. Also, the energy dissipated by cracks determined numerically is greater than the energy measured in the tests. This difference is explained by sensors accuracy of the experimental device, which are not able to detect all the generated acoustic events. The results obtained will allow us to better understand the dynamic phenomena in the deep underground structures. Another application consisted in modeling an iron ore pillar of Joeuf (Lorraine). The numerical model shows two modes of cracking in the pillar: (a) flaking of pillar wall, (b) two breaking bands initiating from the wall and the roof of the pillar to propagate towards his core. This provides good perspectives for better understanding cracks propagation at a larger scale, also to progress in the understanding of the correlation between geomechanics and geophysics
Développement d'un modèle analytique d'interaction sol-structure pour l'étude du comportement mécanique des structures soumises à un mouvement de terrain : influence des déformations de cisaillement et de la plasticité by Bakri Basmaji( )

1 edition published in 2016 in French and held by 1 WorldCat member library worldwide

This work is a continuation of the research work conducted in the Géoressources Laboratory and INERIS since several years. It concerns the assessment of the vulnerability of masonry structures influenced by natural or induced ground movements. The origins of the movement are may be, mining subsidence, tunneling, and shrinkage-swelling of clayed ground. The objective of the thesis is to develop an analytical model to evaluate the differential settlement of a structure in relation to the free field ground movement and given a set of phenomena: soil-structure interaction, influence of shear deformations in the structure and the ground, influence of non- linearities induced by the ground yielding. The soil was modeled by Pasternak elements to take into account the influence of shear deformations in the soil, while the building is modeled by the Euler-Bernoulli beam and by the beam of Timoshenko. The possibility of having a gap under the building was also taken into account. The deflection transmission ratio is then calculated and plotted according to are lative stiffness ratio which depend on both the structure and the soil stiffness A numerical model is also developed and results are compared with those of the analytical model. Other results of several numerical and experimental models principally developed at the University of Cambridge are also used for this comparison. Results show significant consistence between all these results. This demonstrates the significance of the analytical soil-structure model developed in this thesis
Simulation des affaissements miniers et de leurs conséquences sur le bâti by Yinfei Cai( )

1 edition published in 2015 in English and held by 1 WorldCat member library worldwide

The objective of this thesis is to improve the methods of subsidence computation and building damage evaluation, and to develop some tools based on these methods to study the mining subsidence and building damage cases in Lorraine. By investigating the topography influence on subsidence under simplified mining conditions, and using numerical models with varying mining depths and ground surface angles, a new influence function method, which is based on a probability density function of a skew normal distribution, to simulate the element subsidence, was firstly developed and can be used to compute the mining subsidence caused by the excavation under non-flat surface. Then, plane framed structural models were chosen to study the mechanical behavior of 3D buildings. For each building, two plane models located in the vertical sections passing through the principle inertia axes of the building's projective polygon were considered. Their geometry and mechanical characteristics were chosen according to the construction type and used materials of the building under consideration. Then, by using the matrix displacement method with some modifications, the internal forces and displacements for the entire structure could be computed. The achieved internal forces could then be compared to damage grade criteria to determine the extent of building damage.Finally, by using the improved methods of subsidence computation and building damage evaluation, a real case application was performed in Joeuf city (France). The subsidence was computed and applied to the defined structural models as support displacements, and then the damage extents of the buildings in Joeuf were predicted
Méthodologie d'aide à la décision pour une gestion durable des risques d'origine naturelle en contexte incertain by Abla Mimi Edjossan-Sossou( )

1 edition published in 2015 in French and held by 1 WorldCat member library worldwide

Natural hazard risk management is a major strategic challenge for territorial authorities because of the potential adverse effects on their development that arise from the occurrence of such a kind of risks. With a view to sustainably managing these risks, the development of multicriteria decision-support methods and tools to evaluate the sustainability of risk management strategies is an interesting and topical research subject. The main underlying challenges of sustainability assessment are to define a theoretical framework that will enable assessing the sustainability, and to take into account inherent uncertainties that could derive from various sources (input data, methodological choices, dynamics of the context, etc.), and that could potentially influence the relevance of assessment results. Hence, there is a need to develop a methodology for handling uncertainties in the decision-making process in order to provide decision-makers with the most relevant results. The present research introduces an overall decision-support methodology for assessing the sustainability of risk management strategies that relies on the concept of sustainable development and includes a set of criteria and indicators for reporting on the technical, economic, societal, environmental as well as institutional outcomes of the strategies. Data uncertainties are quantified using probabilistic (Monte Carlo simulations) or possibilistic (possibility theory) approach, and are propagated along the evaluation process through interval arithmetic operations. Beyond that, a computational tool was designed to simulate, in a deterministic or uncertain way, various types of flood damages at a municipality scale. These contributions were applied to a case study regarding flood risk management in Dieulouard, which consists of comparing three management strategies (respecting constructive constraints for new buildings in hazard prone areas fixed by the flood risks prevention plan, constructing a dyke as a collective defence infrastructure, implementing individual protective measures for all buildings in hazard prone areas). This application demonstrates the practicality of the methodology, and highlights prospects for future works
Evaluation of the impact of a cavity upon an earth dike (analytical and numerical approaches) : Application to the Val d'Orléans area (France) by Rafid Alboresha( )

1 edition published in 2016 in English and held by 1 WorldCat member library worldwide

The objective of this thesis is to study the interaction mechanisms between a cavity resulting from a karst collapse and a fluvial dike. The question that arises here is to evaluate the potential role of cavities beneath the dikes and their impact on the dike stability in normal and extreme flood conditions. Therefore, the first main point of the present work is to create a method to assess the influence of a dike on the stability of a cavity beneath it. Thereafter the second main point is to evaluate the stability of the dike slope when a cavity appears underneath without taking into account the collapse of the cavity. To achieve the objectives of the thesis, the dike effect on the cavity stability was investigated by studying the influence of the cavity location relatively to the dike and the interaction mechanisms, in the way to prioritize the geometric and geotechnical parameters for a better evaluation of the risk of dike failure. Numerical and analytical approaches were used. An application is described based on the in situ observations and data for the Val d'Orléans area (France). This area is protected against the Loire's floods by 52 km of earth dikes (levees), in this area, more than 600 karstic sinkholes from 0.5 to 20 m diameter have been identified. The first results of the analytical method show that the cavity instability can significantly increase when the cavity is located under the centre of the dike, and this can affect the stability of the dike when the cavity is sufficiently close to it. We also show that there is a significant effect of the cavity on the dike slope stability, especially in the saturation state (i.e. during extreme floods): cavity collapse can then contribute to dike collapse. A nonlinear numerical modeling (2D and 3D) was used to validate the analytical approach, and to highlight the influence of the different geometrical and geotechnical parameters of the dike and the cavity. The results of the numerical modeling confirmed those of the analytical method. As operational conclusion, the results of the analytical model can be used to help assessing hazard due to the dike collapse taking into account the likelihood of an existing cavity, its position and diameter, and the thickness of the alluvium layer, regarding the data from the Val d'Orléans area
Étude des mouvements de surface en environnement minier à partir d'interférométrie radar et identification des origines des déformations : l'exemple du bassin Nord/Pas-de-Calais by Yann Gueguen( Book )

1 edition published in 2007 in French and held by 1 WorldCat member library worldwide

Les besoins en énergie fossile durant l'ère industrielle ont conduit à l'exploitation intensive des ressources houillères du bassin carbonifère Nord/Pas-de-Calais (France). L'extraction de ces matériaux entraîne un déséquilibre des structures géologiques se traduisant en surface par des affaissements. Si la plus grande partie des affaissements se produit lors de l'extraction, une subsidence résiduelle peut perdurer durant une période plus ou moins longue après l'arrêt des exploitations. Charbonnages de France est en charge de la surveillance de ce phénomène dans le Nord/Pas-de-Calais depuis le 21 décembre 1990, date de fin des travaux miniers. En utilisant les nivellements de haute précision, CdF se heurte aux limitations de cette méthode (coût, durée...). Dans ce contexte, nous avons utilisé les méthodes interférométriques radar afin d'apporter un outil de qualité pour caractériser et quantifier les mouvements de surface et de déterminer la part de l'affaissement résiduel face aux autres phénomènes. Les résultats fournis par ces méthodes concordent avec les ordres de grandeurs des déplacements connus et apportent des informations nouvelles sur la forme et l'étendue des cuvettes d'affaissements d'origines minières. La mise en évidence d'autres phénomènes pouvant entraîner des mouvements du même ordre de grandeur a également été menée et en a permis une meilleure prise en compte dans l'étude des mouvements de surface dans le bassin Nord/Pas-de-Calais
Complex mining exploitation optimising mine design and reducing the impact on human environment (COMEX)( Book )

1 edition published in 2017 in English and held by 1 WorldCat member library worldwide

COMEX intends to improve the understanding of impacts of mining activity on structures and infrastructures. It started on 1st July 2012 and finished on 30th June 2015. The works realised in the WP1 concerns the analysis and the interpretation of in-situ observations to understand the origin of the disorders of underground mine (Poland) and open pit mine (Greece). A seismic damage scale was developed and validated for different European countries. Within WP2 the guidelines for the layout and support of longwall panels in subsidence damaged ground above previous workings were updated. This was based on detailed deformation monitoring and large and small-scale numerical modelling at a case study site where 5 longwalls over-worked previous longwalls of varying age and geometries. In addition, a numerical model was developed to improve prediction of surface subsidence over underground coal mines. The prediction of the subsidence consequences was studied using physical and numerical modelling. Two physical models were developed (1g and ng). Different technical approaches were used to simulate the masonry structure and to identify the damages. The results were validated using 3D numerical models. The results allowed identifying the damage level due to ground movement that transferred to a masonry structure. Different designs of underground mine and open pit mine were discussed in WP4. The main results concern the application of the mitigation recommendations to design the open pit mine and underground mine. For building, three mitigation techniques were tested using physical modelling and in-situ experimentation (periphery trench, geotextile and grout columns)
Numerical modeling of stress redistribution to assess pillar rockburst proneness around longwall panels : Case study of the Provence coal mine, France by Samar Ahmed( )

1 edition published in 2016 in English and held by 1 WorldCat member library worldwide

Le phénomène de coup de terrain est une explosion violente de roche qui peut se produire dans les mines souterraines. Dans la présente recherche, nous avons essayé de démontrer les causes qui peuvent influer sur la prédisposition aux coups de terrain en utilisant la modélisation numérique. Cependant, avant tout, l'état de contrainte avant l'exploitation minière et les contraintes induites par les excavations environnantes doivent être étudiés avec précision. La mine de charbon de Provence, qui a subi un phénomène de coup de terrain au niveau de son puits vertical entouré de nombreux panneaux de longue taille, a été choisie comme cas d'étude. Un modèle numérique 3D à grande échelle a été construit pour inclure la zone du puits vertical avec ses piliers et galeries à petite échelle et les panneaux de longue taille à grande échelle avec leurs zones de foudroyage associées. Plusieurs problèmes ont été rencontrés lors du développement de ce modèle numérique à grande échelle. Le premier porte sur l'initialisation de l'état de contrainte à grande échelle, où les contraintes verticales mesurées divergent avec le poids des déblais et les contraintes in situ sont très anisotropes. Le deuxième porte sur la simulation de la zone de foudroyage associée aux panneaux de longue taille. Le troisième concerne l'évaluation de l'instabilité du pilier en fonction de son ratio résistance/contrainte moyenne et de son volume. Le quatrième concerne l'évaluation de la prédisposition aux coups de terrain au niveau du puits vertical en fonction de différents critères. Cinq méthodes ont été développées pour initialiser l'état de contrainte hétérogène dans le modèle numérique à grande échelle avant l'exploitation minière. Elles sont basées sur la méthode de corrélation Simplex, qui consiste à optimiser la différence entre les valeurs de contrainte mesurées in-situ et les valeurs numériques. Le but est de développer des gradients qui soient capables d'exprimer l'hétérogénéité de la contrainte et qui soient compatibles avec les mesures in-situ. La méthode basée sur l'initialisation de l'état de contrainte avec des gradients 3D s'est avérée plus efficace que celle traditionnelle basée sur les ratios de contrainte horizontale à verticale. Concernant la simulation du foudroyage, trois modèles ont été développés et intégrés dans le modèle numérique pour exprimer le comportement mécanique dans la zone de foudroyage au-dessus des panneaux de longue taille. Deux d'entre eux sont basés sur un comportement élastique alors que le troisième est basé sur un comportement elasto-plastique avec écrouissage un phénomène de consolidation. Il a été constaté que la zone de foudroyage au-dessus des panneaux de longue taille peut atteindre 32 fois l'épaisseur de la couche exploitée et que le module d'élasticité de la partie la plus endommagée de la zone foudroyée ne doit pas excéder 220 MPa pour satisfaire la convergence toit-mur. Mais, avec l'avancée de l'exploitation, ce matériau souple se compacte sous la pression des couches supérieures. Dans le cas d'une largeur critique et super-critique, la contrainte verticale dans la zone de foudroyage pourrait dépasser le poids des déblais et pourrait augmenter jusqu'à 4 fois ce poids sur les bords. La contrainte verticale a augmenté dans les piliers au niveau du puit vertical suite à l'exploitation des panneaux de longue taille à proximité. Il a été constaté que le volume du pilier joue un rôle important dans sa stabilité. Le rapport contrainte/résistance a été jugé insuffisant pour expliquer un coup de terrain. Plusieurs critères ont été intégrés au modèle numérique pour évaluer la prédisposition aux coups de terrain. Il a été constaté que les critères basés sur les contraintes et les déformations sont capables d'évaluer la prédisposition aux coups de terrain
Smarter lignite open pit engineering solutions (SLOPES) : final report( )

1 edition published in 2020 in English and held by 1 WorldCat member library worldwide

The SLOPES project brought together experts from across Europe to advance the current technology and methodologies applied to understanding, analysing, and monitoring slopes within open pit lignite mines. The project targeted three main areas. Firstly, the research evaluated how modern monitoring techniques can be applied and integrated within automated systems that provide 'real-time' assessments of risk. A particular focus was the potential use of unmanned aerial vehicles because of their versatility and that they reduce the need to have people and equipment in hard to access and potentially dangerous areas. Secondly, the project conducted a variety of stability analyses of open-pit rock-face slopes. Advanced probabilistic analyses were developed, giving improved methods for evaluating the performance and potential risks associated with open-pit slope faces. Advanced numerical modelling techniques were applied to gain an in-depth understanding of the behaviour of the slope faces, as well as an assessment of the potential vulnerability of mining and other nearby infrastructure. Finally, the project studied the long-term behaviour of lignite mine spoil materials, with particular attention on stability and ground movements within spoil heaps and reclaimed ground. A rigorous approach involving laboratory testing of soils, small-scale physical modelling (including elevated gravity modelling using a geotechnical centrifuge), and numerical/probabilistic modelling was applied. The project outcomes will enable development of effective reliability-based methods for the evaluation of risks based on monitoring and modelling results which will provide significant benefits to design optimisation and decision support within open-pit lignite mines
 
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Alternative Names
Al Heib, Mohamed Marwan

Languages
French (13)

English (5)