Technology Application of Roof Fracturing and Increasing Permeability of Coal Seam

To solve the gas control problem of Xin'an Coal Mine, improve the level of gas control and strengthen the outburst prevention effect, combining with the coal properties and coal seam occurrence characteristics, two fracturing holes were constructed in No.1 and No.2 drilling field through the roof at 14170 working face by injecting the high pressure fluid through drilling fracturing to achieve the pressure relief and permeability increasing purpose. The experimental results in field show that the technology can effectively improve the gas concentration and flow of gas drainage borehole, and improve the effect of the gas extraction greatly and reduce the outburst danger of construction area effectively. A pressure relief and permeability increasing technology that is suitable for Xin'an Coal mine was formed through tests in field.