Study On Supporting Technology Of Huge Thick Coal Entry Under Rock Burst Condition

Entry supporting of thick seam is one of the importment problems that coal mine faces.Along with the increase of deepness of mining,rock burst make supporting of this type of entry become more and more difficult. Therefore,based on the entries of 21181 and 21121 working face of Qianqiu Coal Mine,this text study entry supporting technology of huge thick coal under rock burst condition.This text adopt theory analyse and industrial test method analyzing the characteristics and influence factors of happening of rock burst in this geologic condition,and confirm the type of rock burst is coal-seam model,the orientation of rock burst is middling.Using RFPA2D,we study the mechanics of rock burst and broken principle of surrounding rock in entry.Based on analyzing the supporting failure by stell yieldable support,the paper provide bolting with wire mesh & stell yieldable support combing supporting method,adopt numerical simulation software FLAC3D optimizing supporting parameters,and improve the stell yieldable support.The designed supporting parameters are taken industrial test in the track roadway of 21121 working face.The result of field observation indicates that bolting with wire mesh & stell yieldable support combing supporting method controls the deformation of surrounding rock very well and it reaches anticipated object.Through the research of this text,we overcome the problems of deep embedding,big deformation and rock burst in big-size roadway of huge thick coal under rock burst condition,solve the importment task of supporting under this condition,ensure mine regular production.