Feedback

Faculté des Sciences appliquées
Faculté des Sciences appliquées
MASTER THESIS
VIEW 18 | DOWNLOAD 15
Hanna, Jamil ULiège
Promotor(s) : François, Bertrand ULiège
Date of defense : 24-Jan-2025 • Permalink : http://hdl.handle.net/2268.2/22415
Details
Title : Finite Element modeling of geomechanical processes in longwall mining
Author : Hanna, Jamil ULiège
Date of defense  : 24-Jan-2025
Advisor(s) : François, Bertrand ULiège
Committee's member(s) : Collin, Frédéric ULiège
Goderniaux, Pascal 
Boti, Ioan 
Language : English
Discipline(s) : Engineering, computing & technology > Civil engineering
Institution(s) : Université de Liège, Liège, Belgique
Degree: Master en ingénieur civil des constructions, à finalité spécialisée en "civil engineering"
Faculty: Master thesis of the Faculté des Sciences appliquées

Abstract

[en] Longwall mining, a method first implemented in the 1920s, has seen significant advancements in
recent years with the development of more powerful excavation tools and automated support systems. This research investigates the geomechanical behavior of goafs, the voids created during the longwall mining process, focusing on their potential for repurposing as geothermal energy storage spaces. The study utilizes finite element modeling (FEM) to simulate the displacement, stress distribution of both the goaf and the surrounding intact rock. On that base porosity and permeability evolutions in the goaf are predicted. The modeling approach incorporates elastic and elasto-plastic material properties, with a particular emphasis on plastic compressibility, using the LAGAmine software. The modeling of reference case provides some insights on the geomechanical behavior of longwall mining including the goaf and the surrounding rock. Then the research builds on a real-world case from the Belgian Mining Basin, focusing on understanding the hydraulic properties of rock environments within and near the exploited areas. Four key parameters (the plastic compressibility factor (β), the lateral boundary conditions, the depth of the goaf, the bulking factor b) are analyzed for their sensitivity in affecting the representation of reality and the results of the simulations. The findings indicate that the geomechanical characteristics of the goaf, such as its porosity and permeability, play a crucial role in determining its suitability for geothermal energy storage applications. This study offers valuable insights into the behavior of goafs, showing that with proper modeling, previously mined-out areas could be transformed into valuable assets for sustainable energy storage. The results of this research advance the understanding of how geomechanical processes impact the stability and usability of goafs and highlight their potential for integration into renewable energy systems


File(s)

Document(s)

Annexe(s)

File
Access Abstract.pdf
Description:
Size: 126.2 kB
Format: Adobe PDF

Author

  • Hanna, Jamil ULiège Université de Liège > Master ing. civ. constr. fin. spéc. civ. eng.

Promotor(s)

Committee's member(s)

  • Total number of views 18
  • Total number of downloads 15










All documents available on MatheO are protected by copyright and subject to the usual rules for fair use.
The University of Liège does not guarantee the scientific quality of these students' works or the accuracy of all the information they contain.