Fully-mechanized rapid heading and support technology of large cross sectional intersection

in order to solve the long heading span.suppor ifficuty.stow constructio speed.insuficient construction period and other problems of the lage cross section intersection in the mine roadway .with the analysis on the stresslimit balancestatus of the coa ailla at the intersection nd th disturance degreeofth drllgand blasting heading to the surrounding rock aconstruction plan of the forward branch apid heading nd support withEBZ20.illy-mechanized roadheader was provided.Taking a heading face of the north auriiary transportaton roadway in Wangiaing Mine as a case the constoucion method was appi dfrty to the tog secionof te heading arch base line in the mine inclined roadiway at the reaming secion of the mine roadwa Afer the bastingof the o.ck.the rof ofcadiway shoud be inely sppored. When the heading operation reached to the designed location,the boom secion below the arch baselineof the mine roadway would be excavated.Afer the profle completed.,the cross section would be reaned and the top section would be excavaled.Fnally the support and shotreting woud be conduced .Afer the inclined oaiway heacding completed,the same technical heading would be applied to the mine horizontal roadway .The resutis showed tht within four days.the mechanized roadheader was succesilly applied to rapidly excavate and suport the lage cross section roadivay at the nerecion.The technogy could not nly improve the he adingspeed at the cross section of the intersecton,but a/so overcome the dificult suppor of the stress superpostion and narrow ca pllarand coud provie th rerence asis to the mechanized operation at the intersection of the mine roadway.