Analysis of Method of Methane Drainage in Gob

The arrangement methods of high drainage roadway are analyzed.It should be selected at relatively stable and middle-lower part of fractured zone,relatively small rock hardness,convenient for construction.The control method of methane drainage of the high drainage roadway is put forward.The parameters of high location drilling field are determined including inclination of borehole,sealed borehole length,drilling field distance and effective drainage time.The methane concentration judgment method of borehole failure is defined.