Mikrodalgaya Maruz Bırakılan Karbonatlı Kayaçların Dayanımında Meydana Gelen Değişimlerin Araştırılması

Abstract

Today, it is of great importance that ores are produced economically and accessible for the rapid production of raw materials required in line with the needs of the rapidly increasing world population. The fact that the cover layer of the ores can be easily excavated is an important parameter for its economical production. Excavation costs of rocks vary according to their strength and hardness. In addition, as a result of the growing and metropolitanization of cities due to population growth, it takes a long time to go from one place to another and the fuel consumption of vehicles increases greatly. Alternative transportation systems were needed due to the increase in transportation problems. In line with this need, underground transportation systems are becoming more widespread and more are planned. In the coming years, it is expected that the underground transportation networks will expand with the tunnels to be built within the city and between the cities and even between the countries. For these and similar reasons, in order to reach the planned targets in a shorter time and accordingly with less cost, by using the microwave system in order to excavate the rocks more easily and economically, in this thesis study, the differences in the strength of the carbonate rocks applied to the microwave were studied. In this thesis, 8 different carbonate rocks taken from different regions were studied. The samples were prepared for uniaxial compressive (UCS) and Brazilian tensile strength (BTS) tests by coring the rocks. The samples were divided into two different groups among themselves as dry and saturated with water. Prepared samples were exposed to microwave in a 6 kW microwave oven for 2, 3, 4, 5 and 6 minutes. After the surface temperatures were measured and noted with the help of an infrared thermometer, UCS and BTS tests were carried out as hot, and the changes in their strength were examined. The percentages of decrease in the strength of the rocks, which were microwaved for 6 minutes at 6 kW power, were observed as follows: It was observed that there was a decrease in strength between 9% and 100% in dry UCS samples, between 7% and 100% in saturated UCS samples, between 16% and 63% in dry BTS samples and between 23% and 63% in saturated BTS samples. In conclusion, it can be said that microwave exposure has a significant effect on the strength of carbonate rocks.