Abstract: This paper presents the concept and its calculation method of reaction degree based on the essential principles of the quantification, which extends its range of application for the primary reaction with a better scientific analysis. Taking the Zhongmacun mine as an example, the paper adopts the method of combining carving-up statistical cells and the third theory of quantification to screen 8 sensitive geological factors out of 11 geological indices that control coal and gas outburst. Based on the analysis, the regional partitions are made for the gas geology at the Zhongmacun mine. The authors then conclude that it is feasible to apply the third theory of quantification in gas geology, which offers a new insight into the filtering of geological factors for the forecast of gas outbursts.