Abstract: In order to solve the problems of low gas extraction concentration and short effective extraction period in the borehole of Shanxi Gaohe Energy Co., Ltd., the effect of gas extraction borehole extraction concentration was investigated in the E2310 working face, and the gas leakage position was detected for some low-concentration extraction boreholes, and through the comparative analysis of gas extraction concentrations at different locations, it was found that the main gas leakage location of the gas leakage borehole was concentrated in the range of 16m to 21m at the orifice, and a new liquid sealing material and the technical equipment for precise plugging and concentration of gas pumping pipe bottom secondary grouting were developed. The precise sealing of the gas leakage channel of the low-concentration borehole was realized, the gas extraction capacity of the low-concentration failure borehole was restored, and an efficient extraction technology system for the concentration of the extraction borehole suitable for Gaohe Energy was formed.