Abstract：As the exploitation of a coal mine is gradually extending to the deep area, the environment of exploitation has become more and more complex, and gas disaster also becomes serious.It becomes particularly important to grasp the change law of gas content in deep area.By making the correlation analysis of gas content and coal seam depth in the methane zone of a mining area, a fitting curve of hyperbolic was chosen.Through the mathematical models of the curve which can effectively fit the known data, the deep gas content of mine was predicted, and then the mining practice was guided.In addition, proposed new ideas might further validate the model's accuracy through the comparison between the result of the adsorption constant value and that of the model limit.

Keyword：methane zone;gas content;adsorption constant;nonlinear regression;