The impact of the mineral composition of Carboniferous claystones on the water-induced changes of their geomechanical properties

Authors

  • Piotr Małkowski AGH Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie Al. Adama Mickiewicza 30, 30-059 Kraków
  • Łukasz Ostrowski AGH Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie Al. Adama Mickiewicza 30, 30-059 Kraków
  • Piotr Bożęcki AGH Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie Al. Adama Mickiewicza 30, 30-059 Kraków

DOI:

https://doi.org/10.7494/geol.2017.43.1.43

Keywords:

Carboniferous claystones, geomechanical properties, water-induced changes, mineral composition

Abstract

In this article, the authors describe the characteristics and changes of geomechanical properties of Carbonifeorus claystones as related to their mineral composition and the time of soaking in water. Geomechanical properties, including bulk density, Young modulus, Poisson ratio, unconfined compressive strength, durability index, and swelling index were examined in dry rock samples, and in water-soaked samples after 3 hours of soaking, and 6 hours of soaking respectively. Changes in the geomechanical properties of rocks were also examined as a function of their mineralogical composition. In particular, the properties of rocks were examined in relation to present aluminosilicates and layered aluminosilicates, respectively. Changes in the geomechanical properties were also examined relative to the presence of minerals anatase and siderite. Correlation coefficients between physical parameters and mineral composition were examined. It was determined that the total quantity of aluminosilcates is a better predictor of geomechanical properties after soaking, than only the content of layered aluminosilicates. Calculated correlation coefficients were generally higher for most samples after 6 hours of soaking than after 3 hours of soaking. It was also determined that the increase of bulk density correlates much better with the mineral anatase content, than with the siderite content.

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Published

2017-07-26

How to Cite

Małkowski, P., Ostrowski, Łukasz, & Bożęcki, P. (2017). The impact of the mineral composition of Carboniferous claystones on the water-induced changes of their geomechanical properties. Geology, Geophysics and Environment, 43(1), 43. https://doi.org/10.7494/geol.2017.43.1.43

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