Abstract：Aiming at the gas control problems of long cycle and water inrush serious threat in medium-hard and high-pressure confined water coal seam, by using kilometre-directional coal drilling instead of floor rock roadway to pre-draw coal seam gas, a device for gas content measuring based on fixed-point closed sampling of deep hole into coal seam was developed, so that the parameter determination problem for the effect test was solved.After the industrial test in Zhaogu No. 2 mine, the uniform gas extraction and control of 600 m long coal roadway strip was realized, and one-off overall evaluation of ultra-long section was achieved, which ensured the safe driving in gateway. The new technology of gas control in deep coal seam area of Zhaogu No. 2 coal mine provided a reference for gas control of coal seams similar to geological conditions.

Keyword：Zhaogou No.2 coal mine;medium-hard coal seam;regional gas control;directional coal drilling;fixed-point closed sampling;