A Moisture Index Classification System for Rocks (MiC System) |
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| Authors: | A Fahimifar H Soroush |
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| Institution: | (1) Department of Civil and Environmental Engineering, Amirkabir University of Technology, Tehran, Iran;(2) Department of Petroleum Engineering, Amirkabir University of Technology, Tehran, Iran |
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| Abstract: | Summary. Interaction of rocks with water is leading to a reduction in physical and mechanical properties, and quantifying this effect
has always been a problem for design purposes in rock engineering projects. Despite the fact that a number of considerable
works have been carried out in this field, they are not thorough and general. In this paper, a new rock classification system
is presented in order to evaluate wet rock properties.
Laboratory studies showed that six parameters may be recognized as major controlling parameters for wet rocks, including:
water absorption, porosity, weathering degree, swelling index, number of microfissures, and average grain size. Many tests
were performed and a sensitivity analysis was carried out on the data obtained. This analysis characterized the rock sensitivity
when changing each parameter and consequently, a rating value was assigned to each parameter.
By adding these rating values, a rating between zero and 100 is allocated to each rock as Moisture index (Mi). The closer
this index is to 100, the more sensitive rock will be to moisture. On the basis of this index, rocks are divided into five
classes including: very good, good, fair, weak and very weak. |
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| Keywords: | : Rock classification moisture index pore pressure water absorption uniaxial compressive strength |
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