Download or read book La fragmentation naturelle des massifs rocheux written by Luc Empereur-Mot and published by . This book was released on 2006 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: La connaissance du milieu fracturé tridimensionnel est basée sur l'observation directe ou indirecte d'extraits, en une ou deux dimensions. Les difficultés de visualisation en 3 dimensions et l'existence constante de nombreuses lacunes géométriques sont un handicap majeur pour la compréhension des lois de comportement complexes du milieu rocheux fracturé. Des modèles numériques dits "équivalents" répondent isolément à une problématique particulière du réseau de fractures (mécanique, hydraulique, thermique). Pourtant, un grand nombre de propriétés physiques du massif rocheux sont conditionnées par la géométrie et la topologie du système de fractures, qui reste une question d'ordre fondamental. C'est un aspect essentiel que nous traitons dans notre modèle OBSIFRAC (modèle objet pour la simulation de la fracturation). L'observation de sections naturelles justifie que l'on représente, dans un milieu soumis à la seule déformation cassante, les discontinuités par des surfaces planes, interconnectées, sans terminaisons libres, limitant des polyèdres convexes. Dés lors, le réseau de fractures peut être vu comme un assemblage de blocs. Cette hypothèse nous a permis de construire une base de données tridimensionnelles du réseau, décrivant de façon exhaustive les constituants géométriques de l'assemblage en question (fractures, blocs, faces, arêtes et noeuds). A partir d'un "germe" ponctuel, le processus de fragmentation affecte un ou plusieurs bloc(s) formé(ś) éventuellement de plusieurs polyèdres élémentaires. L'orientation et la position des plans de fractures peuvent ^etre définies de façon stochastique, statistique ou déterministe. Nous avons développé 4 moteurs de fragmentation, notés A, B, C, et D, qui diffèrent par le protocole de choix du germe d'une part, et par le choix du ou des blocs à diviser d'autre part. Nous présentons pour chaque scénario, une caractérisation descriptive, puis statistique.
Download or read book La fracturation naturelle des massifs rocheux mod les de blocs et bases de donn es tridimensionnelles written by Luc Empereur-Mot and published by . This book was released on 2001 with total page 187 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Numerical Models in Geomechanics written by G.N. Pande and published by CRC Press. This book was released on 2004-08-15 with total page 760 pages. Available in PDF, EPUB and Kindle. Book excerpt: Reflecting the current research and advances made in the application of numerical methods in geotechnical engineering, this volume details proceedings of the Ninth International Symposium on 'Numerical Models in Geomechanics - NUMOG IX' held in Ottawa, Canada, 25-27 August 2004. Highlighting a number of new developments in the area, papers concentrate upon the following four main areas: * constitutive relations for geomaterials * numerical algorithms: formulation and performance * modelling of transient, coupled and dynamic problems * application of numerical techniques to practical problems. Representing the most advanced, modern findings in the field, Numerical Models in Geomechanics is a comprehensive and impeccably-researched text, ideal for students and researchers as well as practising engineers.
Download or read book ANALYSE DE LA FRAGMENTATION A L EXPLOSIF DE MASSIFS ROCHEUX EN VUE DE L OPTIMISATION DE L ABATTAGE EN SITES MINIERS written by JOHANN.. ALER and published by . This book was released on 1994 with total page 215 pages. Available in PDF, EPUB and Kindle. Book excerpt: CE TRAVAIL PROPOSE UNE NOUVELLE METHODOLOGIE DESTINEE A EVALUER QUANTITATIVEMENT L'EFFICACITE DES TIRS DE MINES. ELLE EST FONDEE SUR LA COMPARAISON DES DISTRIBUTIONS DE TAILLE DES BLOCS DU MASSIF AVANT LE TIR ET DU TAS ABATTU APRES LE TIR. LA DISTRIBUTION DE TAILLE DES BLOCS IN SITU, APPELEE BLOCOMETRIE, EST ESTIMEE A PARTIR DE LA SIMULATION TRIDIMENSIONNELLE DES DISCONTINUITES DANS LE MASSIF. CETTE SIMULATION EST BASEE SUR UNE ANALYSE STATISTIQUE EXHAUSTIVE DES CARACTERISTIQUES DU MASSIF ROCHEUX, EN PARTICULIER DE SES DISCONTINUITES. LA DISTRIBUTION DE TAILLE DES BLOCS DES TAS ABATTUS, D'UN AUTRE COTE, EST FONDEE SUR L'ANALYSE D'IMAGES DES PHOTOS DU TAS PRISES ALEATOIREMENT. L'APPLICATION DE LA METHODOLOGIE DANS PLUSIEURS MINES NOUS A DONNE DES RESULTATS LOGIQUES CORROBORES PAR DES OBSERVATIONS SUR LE TERRAIN. NOUS AVONS PU EGALEMENT INTRODUIRE UN PARAMETRE APPELE INDICE DE FRAGMENTATION QUI TRADUIT, DE MANIERE QUANTITATIVE, L'EFFICACITE D'UN TIR. PAR LE BIAIS DE CE PARAMETRE, NOUS AVONS PU ESTIMER L'AMELIORATION DE LA FRAGMENTATION GRACE A LA METHODOLOGIE, QUI EST DE L'ORDRE DE TRENTE-SEPT POUR CENT POUR LES TROIS MINES ETUDIEES. EGALEMENT, L'ANALYSE GLOBALE DE L'ENSEMBLE DES RESULTATS OBTENUS A PERMIS LA COMPREHENSION DE L'INFLUENCE DES DIFFERENTS PARAMETRES ET L'IDENTIFICATION DES PLUS INFLUENTS. SUR LA BASE DE CES PARAMETRES, UN OUTIL A ETE DEVELOPPE VISANT A PREVOIR LES RESULTATS DES TIRS EN FONCTION DE CES PARAMETRES ET DES CARACTERISTIQUES DU MASSIF ROCHEUX
Download or read book CONTRIBUTION A L ETUDE DE LA FRAGMENTATION DES MASSIFS ROCHEUX A L EXPLOSIF written by Nejla Bouden-Romdhane and published by . This book was released on 1987 with total page 172 pages. Available in PDF, EPUB and Kindle. Book excerpt: POUR CERNER L'INFLUENCE DES PARAMETRES, ONT ETE DEFINIS DES PARAMETRES "AMONT", CARACTERISANT LES MATERIAUX, LES TECHNIQUES ET LES CONDITIONS DE MISE EN OEUVRE, ET DES PARAMETRES AVALS, PAR DES MESURES DES RESULTATS DES EXPLOSIONS. A PARTIR DE 52 TIRS, COMPORTANT CHACUN 30 PARAMETRES, ANALYSE STATISTIQUE EN COMPOSANTES PRINCIPALES POUR ETUDIER LES RELATIONS ENTRE PARAMETRES AMONT ET AVAL ET TESTER LES PARAMETRES UTILISES POUR LES LOIS EXISTANTES; PROPOSITION DE NOUVELLES RELATIONS
Download or read book Engineering geological mapping and site investigation written by International Association of Engineering Geology. International Congress and published by . This book was released on 1990 with total page 840 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Contributions l tude de la fracturation naturelle des massifs rocheux written by Jean Hector and published by . This book was released on 1978 with total page 94 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book La fracturation naturelle des massifs rocheux mod les de blocs et bases de donn es tridimensionnelles written by Luc Empereur-Mot and published by . This book was released on 2001 with total page 187 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Fracturation naturelle d un massif rocheux written by Juliette Chastenet and published by . This book was released on 2000 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Contribution l tude de l interaction nergie explosive massif rocheux en vue de la ma trise de la fragmentation li e aux tirs written by Essaieb Hamdi and published by . This book was released on 2003 with total page 211 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Felsmechanik und Ingenieurgeologie written by and published by . This book was released on 1965 with total page 486 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Report written by and published by . This book was released on 1972 with total page 922 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Revue de g ographie physique et de g ologie dynamique written by and published by . This book was released on 1975 with total page 560 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Advancing Culture of Living with Landslides written by Kyoji Sassa and published by Springer. This book was released on 2017-05-16 with total page 580 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is open access under a CC BY 4.0 license. This volume contains peer-reviewed papers from the Fourth World Landslide Forum organized by the International Consortium on Landslides (ICL), the Global Promotion Committee of the International Programme on Landslides (IPL), University of Ljubljana (UL) and Geological Survey of Slovenia in Ljubljana, Slovenia from May 29 to June 2, 2017. The complete collection of papers from the Forum is published in five full-color volumes. Thisfirst volume contains the following: • Three forum lectures • Background and Content of the Sendai Partnerships 2015–2025 • Contribution from the signatory organizations of the Sendai Partnerships • Landslide Dynamics: ISDR-ICL Landslide Interactive Teaching Tools (LIT T) • Progress of the World Report on Landslides (WRL) • International Programme on Landslides (IPL): Objects, History and List of WCoE/IPL projects • UNESCO-KU-ICL UNITIWIN Network supporting IPL • Landslides: Journal of International Consortium on Landslides • International Programme on Landslides (IPL): WCoEs and IPL Projects • Landslides and Society Prof. Kyoji Sassa is the Founding President of the International Consortium on Landslides (ICL). He is Executive Director of ICL and the Editor-in-Chief of International Journal Landslides since its foundation in 2004. Prof. Matjaž Mikoš is the Forum Chair of the Fourth World Landslide Forum. He is the Vice President of International Consortium on Landslides and President of the Slovenian National Platform for Disaster Risk Reduction. Prof. Yueping Yin is the President of the International Consortium on Landslides and the Chairman of the Committee of Geo-Hazards Prevention of China, and the Chief Geologist of Geo-Hazard Emergency Technology, Ministry of Land and Resources, P.R. China. IPL (International Programme on Landslides) is a programme of the ICL. The programme is managed by the IPL Global Promotion Committee including ICL and ICL supporting organizations, UNESCO, WMO, FAO, UNISDR, UNU, ICSU, WFEO, IUGS and IUGG. The IPL contributes to the United Nations International Strategy for Disaster Reduction and the ISDR-ICL Sendai Partnerships 2015–2025.
Download or read book International Geological Congress Engineering geology written by and published by . This book was released on 1972 with total page 328 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book International Geological Congress written by and published by . This book was released on 1972 with total page 888 pages. Available in PDF, EPUB and Kindle. Book excerpt:
