Preparation method for coal mixture for coke production, coal mixture, and coke production method

Provided is a preparation method for a coal mixture in which the compatibility between coals used in coke production is taken into consideration in order to achieve a coal mixture that is used for the purpose of producing coke of a desired strength. In this preparation method, when preparing a coal mixture that will be used as at least a portion of a coal blend for coke production and that includes at least two types of coal having different surface tensions, the surface tension value for a semi-coke mixture that is obtained from the aforementioned coal mixture is used as a reference in order to adjust the blending ratio of each of the types of coal.