Abstract:

The study of gas content and influencing factor of the coal seam unmined is an important fundamental research. We take the 14# coal seam of Xiaonan coal mine of Tiefa basin as an example and analyse the geologic agent systematically which influences the gas content. We make a study of each influencing factor, establish the gray connection model and calculate the degree of association of the influencing factors by using the gray connection method. The result indicates that the main geologic agent which influences the gas content of the 14^# coal seam of Xiaonan coal mine is the grade of coal metamorphism, the geologic structure, the coal seam thickness, and the depth of the coal seam. We also forecast the gas content by multiple regression. This study provides a scientific method about studying the gas content of the coal seam unmined and provides the basic data about the safe mining.

Key words: gas, gray connection, geologic agent, coal seam, Tiefa basin