• theoretical and experimental considerations on the compressibility dilatation phenomenon using comparative methods

    جزئیات بیشتر مقاله
    • تاریخ ارائه: 1389/07/20
    • تاریخ انتشار در تی پی بین: 1389/07/20
    • تعداد بازدید: 889
    • تعداد پرسش و پاسخ ها: 0
    • شماره تماس دبیرخانه رویداد: -
     the paper presents the results of laboratory studies carried out on several rocks in order to separate the compressible from the dilatation field, employing the dilatation threshold. it is well-known that this parameter is very important as it concerns the rock’s internal structure stability. the method applied by the authors allows the accurate determination of the moment when the passage from one field to another occurs. while in the compressible field the volume decrease takes place until the dilatation threshold is reached, the exceeding of this value brings us in the dilatation domain, where the phenomenon became reversible, under the existing stresses effect. the charts issued after volumetric density and porosity determination by laboratory tests are compared with those widely used for result accuracy checking. on this basis and analysing the behaviour in the compressible and dilatation domain, the rock action before the fracture can be assessed, with significant implication on underground mining excavations and on roof shock occurrence. the paper is based on a huge amount of experimental data obtained on various size samples collected in-situ. the importance of precise determination of separation limit between the two domains is emphasized by the fact that passing from one to another occurs closely to the fracture point, a significant moment with a view to the rock behaviour at deformation regime.

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