Abstract: In order to improve the efficiency of coal seam gas extraction and to accelerate the driving of coal roadway, the large fracturing equipment and long borehole drilling in the underground wall are used to connect the high pressure line of Sihe Mine through the waste pre-pumping well and the floor rock roadway, two boreholes in the coal seam have been fractured twice. For the first time, the length of the coal seam length of the borehole is 102 m. The length of the coal seam length is 150 m in the second fracturing with sand, and the gas discharge of two fracturing is more than 4 m³/min. It is shown that the fracturing technique is feasible for the drilling of the coal seam at 100 meters and above, and the fracturing fluid volume is 623.25 m³ to 998.67 m³. The impact range of fracturing was 80 m to 258 m the integrated well and ground micro-seismic monitoring for the whole fracturing process. The drilling and extraction capacity of 100 meters in the area affected by fracturing is 5.22 to 7.01 times higher than that in the area without fracturing, and the average extraction concentration increased by 0.2 to 0.44 times.