Tenghui mine, in view of the gas management problems in the mining process, 2-202 working face was taken as an example, with drilling arrangement, parameters and sealing process of gas extraction in the long drilling field of the roof plate, the extraction pipeline resistance and negative pressure was calculated on the basis of extraction pipeline selection, then the extraction pipeline laying route was determined, the extraction pipeline installation design, requirements, the cost of construction and the extraction effect were and discussed. The project construction cost and extraction effect were compared with those of high extraction drilling site. The field practice test showed that the cost performance of extraction in the long drilling field of the top plate was better than that in the high extraction field, with good extraction effect, which met the requirements of safe recovery of the working face and provided reference for similar conditions.