Modelling of the drying and flooding of underground iron mines in Lorraine (France)

Grgic, Dragan; Homand, Françoise; Giraud, Albert

doi:10.1016/j.ijrmms.2005.07.004

Cited by 10 publications

(3 citation statements)

References 15 publications

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“…These values obtained from the drying of our Euville limestone, which is a macroporous rock (cf. Section 2.1), are not significant compared to those obtained from the drying of a rock with much smaller pores, for example iron ore (Grgic et al 2005) or argillite (Grgic et al 2006). Indeed, because the Euville limestone is a macroporous rock, its suction curves (Fig.…”

Section: The Mechanical Effect Of Watermentioning

confidence: 95%

“…The work presented here is part of a series of studies (e.g. Grgic et al 2005, 2006; Hoxha et al 2005; Grgic & Amitrano 2009) aimed at increasing the understanding and at quantifying the mechanisms behind the short‐ and long‐term behaviour of rocks in relation to the problem of stability of underground mines and quarries in France. In these shallow environments, rocks constituting pillars (e.g.…”

Section: Introductionmentioning

confidence: 99%

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Estimation of the damage of a porous limestone from continuous (P- and S-) wave velocity measurements under uniaxial loading and different hydrous conditions

Eslami¹,

Grgic²,

Hoxha

2010

Geophysical Journal International

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S U M M A R YThe damage of a porous rock (Euville oolitic limestone) was studied through uniaxial stresscycling tests. An experimental device, allowing the simultaneous and continuous measurement of strains (in two perpendicular directions) and five elastic wave hree P waves and two S waves) velocities in two different directions under fully controlled hydrous conditions, was developed for the work presented in this paper. Hence, the damage was monitored in a really precise and continuous way through the evolution of dynamic and static elastic moduli. The evolutions of wave velocities and elastic moduli, which reproduce very remarkably the shape of the stress-strains curves, showed that the limestone, initially isotropic, became progressively anisotropic during uniaxial loading due to microcrack damage. Indeed, even if the creation of microcracks is probably scattered and isotropic before the coalescence of microcracks, as shown in past studies, pre-existing microcracks and penny-shaped pores which are perpendicular (or almost perpendicular) to the uniaxial stress direction closed, whereas axially-oriented microcracks opened. The anisotropy of the damage is completely reversible but some of the damage is irreversible. V P(90 • ) , which cannot record the opening of these microcracks, started to decrease just before the macroscopic failure of the sample and can detect, therefore, very precisely the macroscopic failure of the material. The influence of water on the strength and deformation of the Euville limestone was analysed by considering both the hydromechanical and physio-chemical ('Rehbinder effect', intergranular pressure solution and subcritical cracking) effects of water.

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Section: The Mechanical Effect Of Watermentioning

confidence: 95%

Section: Introductionmentioning

confidence: 99%

Estimation of the damage of a porous limestone from continuous (P- and S-) wave velocity measurements under uniaxial loading and different hydrous conditions

Eslami¹,

Grgic²,

Hoxha

2010

Geophysical Journal International

Self Cite

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“…In order to isolate and understand the effects of the controlled suction, some authors have considered the sample mass monitoring during a free drying process, which requires a simplest experimental procedure and corresponds to a suction with no mechanical loading, and have proposed transport models to explain their measurements. Some models have then be proposed for a coupling between the transport in the porous network on one side and the mechanical behavior on the other side (see [2] for example for underground iron mines in Lorraine (France)).…”

Section: Objective Of the Studymentioning

confidence: 99%

Experimental measurements and water transfer models for the drying of argillite

Cariou¹,

Skoczylas²,

Dormieux³

2012

International Journal of Rock Mechanics and Mining Sciences

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Dynamic Behaviour of Abandoned Underground Mines: Insights from Numerical Simulations

2022

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The Apulian region (south-east of Italy) is characterized by the presence of old underground cavities used for the extraction of soft calcarenite rocks and then abandoned over time. The assessment of stability of these caves represents a challenging problem, especially for the areas of possible interaction of the caves with overlying structures and infrastructures. The role of environmental factors in triggering disruption processes in the cave has been extensively studied in the literature, but the instability effect related to dynamic loads is often underestimated. Consequently, the purpose of the present work is to propose some advancements in this field by evaluating the effects of dynamic loads, consistent with the regional seismicity, on the stability of calcarenite underground cavities. A large number of two-dimensional parametric finite element analyses has been carried out on ideal cases of single rectangular cavities. The study allowed to detect appreciable instability effects caused by the dynamic input, depending on the cavity width, the thickness of the roof, and the energy content of the dynamic input. The interaction between twin cavities under dynamic conditions has been also studied from a numerical point of view. The results show that plastic failure in the septum is reached earlier under dynamic conditions than static and it is again dependent on the cavity width and the roof thickness. Lastly, a numerical procedure to calculate factor of safety against either shear failure or tensile failure mechanisms has been proposed, which allows to quantify the change of the stability conditions from static to dynamic conditions.

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Modelling of the drying and flooding of underground iron mines in Lorraine (France)

Cited by 10 publications

References 15 publications

Estimation of the damage of a porous limestone from continuous (P- and S-) wave velocity measurements under uniaxial loading and different hydrous conditions

Estimation of the damage of a porous limestone from continuous (P- and S-) wave velocity measurements under uniaxial loading and different hydrous conditions

Experimental measurements and water transfer models for the drying of argillite

Dynamic Behaviour of Abandoned Underground Mines: Insights from Numerical Simulations

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