Abstract: It was the fundamental measure for gas control through gas extraction in a single low permeability outburst coal seam working face.The quality of gas extraction effect was directly controlled by the accurate determination of gas extraction radius, the blank areas for extraction were easily created by excessive spacing between boreholes, the amount of drilling work were increased by insufficient spacing, and the imbalances in extraction and mining was destroyed.The advantages and disadvantages of the current extraction radius were analyzed, especially the determination method specified in the national standard.Based on the actual situation, we proposed that a comprehensive method for determining the effective extraction radius of through layer drilling by combining pressure drop method and gas content method, and industrial applications were carried out.The results indicated that: all parameters in the comprehensive measurement method were obtained by on-site measured data, which can fully reflect the actual situation of coalbed methane occurrence and extraction in the measured area, and each measurement process were mutually validated.The accuracy of the measurement results were ensured.It was determined at 2.80 m of the effective extraction radius(with a punching scale of 0.25 t/m) of the through layer drilling under the standard extraction conditions in the 39th mining area of Zhongmacun Mine.