Study on the technology of drifting tunnel under close distance coal seams goaf passing through fault

Roadway below a goaf supporting is difficult when passing faults in the closed distance seams mining process.This paper using 21109 transporting crossheading excavation passing fault as engineering background.The method of 21109 transporting crossheading excavation passing fault is determined according roof conditions and fault form.Roof combined support with bolt,rope,and W-type steel band with joists.Coal pillar side and working face side used bolt support.Heading face using active supporting is not enough,and then steel shed was erected for auxiliary support.Shallow roof abscission layer 23mm,deep separation 31mm,and relatively closer to the amount of roadway height and width is 33mm and 0mm,when supplementary support measures were taken 28 days.No deformation of roadway was found and roadway surrounding rock stability after 28 days.