Abstract: Zhaogu NO.2 coal mine uses a 1000 m drilling machine to carry out the gas control model of "drilling instead of rock drift", and the technique bottleneck of the gas control model is the fixed-point and closed sampling technique of the super deep?drilling . Through the development of the super deep?drilling sampling device to solve the technical problem of fixed point and airtight during the super deep?drilling sampling, the field application proves that the maximum sampling depth of 595m, the successful rate of 91.7% and the coincidence degree of the parameter measurement results are 89%. The one-off overall evaluation of super long section has been realized, which solves the problem of controlling the effect of coal and gas outburst in directional long drilling , shortens the cycle of gas treatment, and has significant safety and economic benefits.