نتایج جستجو برای: difficult geological conditions

تعداد نتایج: 1087328  

Journal: :Вестник Пермского национального исследовательского политехнического университета. Геология. Нефтегазовое и горное дело 2014

M. Ataei M. Javanshir S. R. Torabi

A literature review revealed that most of the empirical equations introduced for determination of the uniaxial compressive strength (UCS) of rocks based on the Schmidt hammer rebound number (N) are not sufficiently reliable mostly due to the relatively low coefficient of correlations. This is attributed to the fact that in most cases one formula is used for all types of rocks, altho...

Journal: :IOP Conference Series: Earth and Environmental Science 2021

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