Repository logo

Browsing by Subject "block theory"

Filter results by typing the first few letters
Now showing 1 - 2 of 2
  • thumbnail.journal.alt
    Item type:Article, Access status: Open Access ,
    Analiza porównawcza schematów kotwienia tunelu metodą stochastycznej symulacji stateczności bloków
    (Wydawnictwa AGH, 2011) Jakubowski, Jacek
    Paper presents comparative analysis of rockbolt pattern for the conditions of overflow sewer storage tunnel in Atlanta. For the tunnel stability assessment the stochastic simulation of block stability method (MSB) was applied. The method incorporates modified block theory stability analysis within Monte Carlo simulation scheme and stochastic model of discontinuity network. A series of simulations for 3 rockbolt patterns and 14 tunnel intervals has been performed. For each set of data, results describe tunnel stability measures in the means of statistics and probabilities.
  • thumbnail.journal.alt
    Item type:Article, Access status: Open Access ,
    Analiza warunków stateczności tunelu w masywie skalnym o strukturze blokowej dla sytuacji tunelu metra w Nowym Jorku (rejon Manhattan)
    (2007) Jakubowski, Jacek; Stypulkowski, Jacek
    The paper presents discontinuities effect on tunnel stability conditions analyzed with MSB numerical simulation method. Based on statistical description of discontinuities network the MSB method and code creates representation of a blocky structure around a tunnel and analyzes it within a general statistical simulation scheme. Comprehensive description of geology in the vicinity of underground tunnel in Manhattan, New York was a basis for building a statistical model of discontinuities network followed by numerical simulation of stability conditions. Results for two different tunnel directions and for unsupported and rock bolted tunnel were compared. Information on observed geometry, location and size of real unstable blocks around the excavated tunnel allowed comparing computation results with observations.