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Browsing by Subject "chodnik"

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  • thumbnail.journal.alt
    Item type:Article, Access status: Open Access ,
    Algorytmy automatycznego wyliczania bilansu mas węgla surowego oraz skały płonnej przy drążeniu chodników
    (Wydawnictwa AGH, 2011) Krowiak, Andrzej
    In the article mathematical models being used to automating calculations of balance of masses of raw coal and the barren rock were described, for each of working days comprising for the project of opening deposits (driving of the galleries). Three types of algorithms were considered: for the model assuming the successive performance of excavations, for the model taking into account the division of individual excavations into intervals differing indeed the proportion of raw coal and the waste rock and the model assuming parallel driving a few excavations. Enumerated functions are suitable to direct utilization, after defining entrance data.
  • thumbnail.journal.alt
    Item type:Article, Access status: Open Access ,
    An enclosed dust removal system with ducting
    (2012) Xie, Jun; Xue, Sheng; Chen, Weiming; Zhou, Gang
    A numerical modeling study is undertaken to understand gas-solid particle flows at the face of a mechanically developing roadway of an underground coal mine which employs a force-exhaust auxiliary ventilation system and uses mist spray for dust suppression. The FLUENT, a commercial computational fluid dynamics (CFD) package is used with Semi Implicit Method for Pressure Linked Equations (SIMPLE) algorithm for simulation. The results of the modeling show that dust control should focus on the middle area of the face. Based on the results, an enclosed dust removal system with ducting was developed. The system was successfully trialed at an underground coal mine with a satisfactory result.