عنوان مقاله [English]
Weathering is one of the important and controller factors of the physical and mechanical properties of peridotites. The engineering properties of rocks undergo significant changes due to the weathering process. Weathering depends on the mineralogical composition and peridotite texture properties. In this research, the effects of mineralogical characteristics of Harsin peridotites in Kermanshah province were studied. The studies Contains Field surveys and laboratory studies. In vitro studies, thin sections of peridotites were first considered with different weathering conditions. Then, by performing physical and mechanical tests, specific gravity, unit weight, moisture content and porosity were determined, respectively. In the following, the values of unixial compressive strength, Young's modulus, point-load index and hardness of samples were calculated. In this study, due to the mineralogical characteristics and the degree of weathering of the peridotites, based on the degree of serpentinization of the rock in each stage of weathering, the effect of these factors on the engineering properties of the rock was evaluated. By using Excel 2013 regression correlation software the relationship between weathering, mineralogy and texture properties was determined by geological characteristics of peridotite engineering. These relationships have been linear functions. Also, F, t tests confirmed the 95% confidence level of proposed experimental relationships. Based on the results, the highest correlation 0.95, is founded between the point-load indexes with the index of micro-cracks. The results obtained in this study showed that the importance of texture properties is more important than mineralogical properties in determining the geological engineering properties of rock. This means that the characteristics of kernel such as shape and size, type of contact, degree of weathering, and the index of micro-crack shave an important effect on the geological characteristics of the engineering of peridotite rocks.