The effect of clay content on the relation between uniaxial compressive strength and needle penetration index for clay-bearing rocks
نویسندگان
چکیده
Abstract The needle penetration index (NPI) test is a non-destructive that applicable both in the field and laboratory, does not require any special sample preparation. This has been used for estimation of physico-mechanical properties soft rocks. In this study, influence clay content on relation between uniaxial compressive strength (UCS) NPI investigated some clay-bearing tests were carried out at nine different gallery faces during Cayirhan Coal Mine excavations, values calculated. Claystone, clayey limestone blocks collected from locations which performed determination rock contents. contents fractions samples determined using XRD analysis. A strong correlation found UCS NPI, but data points scattered. Strong correlations also total smectite content. strongly correlated to multiple regression analysis was determine UCS-NPI very model derived. coefficient fairly higher than derived by simple Concluding remark significantly affects
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ژورنال
عنوان ژورنال: International Journal of Geo-Engineering
سال: 2021
ISSN: ['2092-9196', '2198-2783']
DOI: https://doi.org/10.1186/s40703-020-00135-y