Sadiye Aslan Kahraman - Profile on Academia.edu (original) (raw)
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Mechanized excavation, cutting and drilling methods have been widely used in mining activities, t... more Mechanized excavation, cutting and drilling methods have been widely used in mining activities, tunnel excavations and natural stone cutting operations. In order to perform a good excavation, cutting or drilling the machinability of the current rocks must be determined. The rock abrasivity is one of the most important parameter for the selection of the cutting tools for the excavation equipments in the mechanized excavation. The Cerchar abrasivity index is one of the most common testing procedures used for the laboratory assessment of hard rock abrasivity worldwide. In this study, seven different kinds of volcanic rocks with different engineering and mineralogical properties were selected as testing samples. Thin sections of the samples were prepared and the percentages of abrasive minerals were determined with the help of polarizing microscope. Then, the Cerchar abrasivity index was determined and the relations among these properties have been investigated by using statistical methods. Some strong correlations between the abrasivity and the percentages of abrasive minerals were found using the simple and multiple regression analysis. Concluding remark is that the Cerchar abrasivity index can be predicted from the percentages of abrasive minerals.
Void detection and identification of bed separation while drilling holes in rocks for roof boltin... more Void detection and identification of bed separation while drilling holes in rocks for roof bolting can be a great source of information for the evaluation of ground conditions and adjustment of ground control or support measures. This can be accomplished through the monitoring and analysis of drilling parameters by the roof bolter. This paper reviews work currently under way in a joint study between Penn State University and J. H. Fletcher & Co.
The uniaxial compressive strength (UCS), Brazilian tensile strength (BTS) and point load strength... more The uniaxial compressive strength (UCS), Brazilian tensile strength (BTS) and point load strength (I s ) tests were carried out on the eight different igneous rocks to investigate the effects of water saturation on their strengths. The results showed that the strength losses due to saturation ranges from 11.5 % to 38.4 % for UCS, from 7.6 % to 35.2 % for BTS, and from 13.9 % to 41.6 % for I s , respectively. Linear regression equations between saturated and dry-rock strength values were also derived. The saturated UCS, BTS and I s of igneous rocks can be predicted from the dry UCS, BTS and I s using the developed equations.
Mechanized excavation, cutting and drilling methods have been widely used in mining activities, t... more Mechanized excavation, cutting and drilling methods have been widely used in mining activities, tunnel excavations and natural stone cutting operations. In order to perform a good excavation, cutting or drilling the machinability of the current rocks must be determined. The rock abrasivity is one of the most important parameter for the selection of the cutting tools for the excavation equipments in the mechanized excavation. The Cerchar abrasivity index is one of the most common testing procedures used for the laboratory assessment of hard rock abrasivity worldwide. In this study, seven different kinds of volcanic rocks with different engineering and mineralogical properties were selected as testing samples. Thin sections of the samples were prepared and the percentages of abrasive minerals were determined with the help of polarizing microscope. Then, the Cerchar abrasivity index was determined and the relations among these properties have been investigated by using statistical methods. Some strong correlations between the abrasivity and the percentages of abrasive minerals were found using the simple and multiple regression analysis. Concluding remark is that the Cerchar abrasivity index can be predicted from the percentages of abrasive minerals.
Void detection and identification of bed separation while drilling holes in rocks for roof boltin... more Void detection and identification of bed separation while drilling holes in rocks for roof bolting can be a great source of information for the evaluation of ground conditions and adjustment of ground control or support measures. This can be accomplished through the monitoring and analysis of drilling parameters by the roof bolter. This paper reviews work currently under way in a joint study between Penn State University and J. H. Fletcher & Co.
The uniaxial compressive strength (UCS), Brazilian tensile strength (BTS) and point load strength... more The uniaxial compressive strength (UCS), Brazilian tensile strength (BTS) and point load strength (I s ) tests were carried out on the eight different igneous rocks to investigate the effects of water saturation on their strengths. The results showed that the strength losses due to saturation ranges from 11.5 % to 38.4 % for UCS, from 7.6 % to 35.2 % for BTS, and from 13.9 % to 41.6 % for I s , respectively. Linear regression equations between saturated and dry-rock strength values were also derived. The saturated UCS, BTS and I s of igneous rocks can be predicted from the dry UCS, BTS and I s using the developed equations.