Repository logo

Browsing by Subject "tremors"

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 rozkładu wstrząsów górotworu w rejonie ściany B-l pokładu 403/3 w aspekcie wybranych czynników górniczych i geologicznych
    (2007) Małkowski, Piotr; Majcherczyk, Tadeusz; Niedbalski, Zbigniew
    The paper presents rockbursts layout in the area of the longwall B-1 which was located close to the faults. Recording dynamic phenomenas let assume, that seismic activity in the region were shown by the exploitation and regional tremors. The analysis of the stress field and the failure zone in the longwall B-1 area proved that one group of tremors were connected with mining factors and the second one with rock mass movements on the fault surface.
  • thumbnail.journal.alt
    Item type:Article, Access status: Open Access ,
    Ugięcie stropu nad eksploatowanym złożem rud miedzi LGOM - wpływ wartości współczynnika eksploatacji na powstanie stref odciążenia miedzy warstwami stropowymi
    (2006) Wosz, Ryszard Józef
    The article is continuation of the research works concerning the principal and direct roof strata deflection above the deposit mined by means of the chamber - pillar system with roof deflection in the exploitation conditions of the copper deposit LGOM. A model of the roof deflection and the solutions of the equations of the beam's axis deflection have been shown in the earlier papers. In this paper has presented the functions of the deflection, which depends the coefficient of excavation. Has calculated value of coefficient: a = 0.01-0.5. In the next step were describing the deflection curves of each data of coefficient and has analyzed the different of deflection of the roofs. Were looking for the tangential point of position of the beams. On this base was decided when the beams taken contact and where were generation the part of the less of contact. This situation was defined as beginning of the process accumulation of elastic potential energy, which can be relieve while destroying the bump of the basic roof.