Sökning: "rock support arches"

Hittade 2 uppsatser innehållade orden rock support arches.

  1. 1. Optimization of support in rock pillars between two parallel tunnels

    Master-uppsats, KTH/Jord- och bergmekanik

    Författare :Alexander Kote; Sohaib Ishaq; [2022]
    Nyckelord :tunnel; rock pillar support; rock pillar stability; rock mass; stresses; arching effect; Nyckelord: tunnel; bergförstärkning; bergpelare; bergmassa; spänningar; valveffekt;

    Sammanfattning : When two parallel tunnels are excavated under high to moderate horizontal in-situ stresses combined with minor deformations in the pillar between the tunnels, the in-situ stresses can be redistributed over the tunnels in form of two compressive arches and are transferred from the roof to the abutments of the two tunnels. At additional deformations in the pillar, a new redistribution of the stresses can occur creating one compressive arch over both of the tunnels. LÄS MER

  3. 2. Numerical Investigation of Rock Support Arches

    Master-uppsats, Luleå tekniska universitet/Geoteknologi

    Författare :Theofanis Rentzelos; [2019]
    Nyckelord :rock mechanics; rock engineering; rock support arches; artificial pressure arches; mining; FLAC3D; numerical investigation; numerical modeling; Dammsjön orebody; model calibration; rockbolt perfomance; ground support; field measurements; displacements; rock support yielding; rock mass yielding; point load test; rill mining method; Avoca mining method; Boliden; rill bench; parametric study; μηχανική πετρωμάτων; μεταλλευτική; υπόγεια έργα; υποστήριξη σηράγγων; υποστήριξη υπόγειων έργων; αριθμητική προσομοίωση διαρροή υποστήριξης; μετατοπίσεις; διαρροή βραχομάζας; τεχνητό τόξο υποστήριξης πετρώματος; δοκιμή σημειακής φόρτισης; παραμετρική ανάλυση; Ακαδημία Αθηνών; bergteknik;

    Sammanfattning : The Garpenberg mine, owned by the Boliden Mining group, has established a trial area at Dammsjön orebody in order to examine the possibility of increasing the productivity of the mine. The mine uses the rill mining method with a current rill height of 15 m. LÄS MER