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Browsing by Subject "hard diggable soils"

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  • thumbnail.journal.alt
    Item type:Article, Access status: Open Access ,
    Obciążenia ekstremalne w procesie projektowania i eksploatacji koparek kołowych przeznaczonych do pracy w gruntach trudno urabialnych kopalń odkrywkowych węgla brunatnego
    (Wydawnictwa AGH, 2009) Alenowicz, Jerzy; Onichimiuk, Marek; Wygoda, Marian
    Problems connected with extreme loadings modelling in the process of design and exploitation of bucket wheel excavators intended for operation in the hard diggable soils, have been presented in the article. Existing deterministic model of bucket wheel loadings has been described. New statistical approach to digging forces modelling of hard diggable soils with bucket wheel excavators has been presented on the basis of actual research on parameters of this process. Extreme values of statistical asymptotic distributions of steel structure stress and unit digging resistances are the basis for modelling. The model of component tangent digging force operating directly on the edge bucket of bucket wheel excavators was proposed. The further procedure connected with verification of proposed statistical model was discussed. The advantages resulting from use of the above model in design and exploitation of opencast mining bucket wheel excavators were given.