Abstract: Taking the Shenjiao Coal Mine 2307 island working face as the engineering background,this paper studies the rational location of mining roadway in isolated island working face by means of theoretical analysis,field test and numerical simulation.Geomechanics evaluation of surrounding rock of roadway was carried out,so as to obtain some information of surrounding rock lithology,the combination of roof strata and roof failure.The characteristics of regional gravitational field of 2307 isolated island working face are obtained.The peak value of principal stress lies in the 5 m range of the side of goaf and the direction and ratio of principal stress change with the advance of mining.The shape characteristics and evolution law of plastic zone in surrounding rock of mining roadway under different pillar sizes are discussed,and the pillar size is determined as 20 m synthetically.Based on the above discussion results,the flexible support scheme is put forward and the industrial test is carried out,which can ensure the roof stability.The above study results can provide guidance and reference for the stability control of surrounding rock of mining roadway in island working face with similar geological conditions.

Key words: Island working face,Surrounding rock stress,Surrounding rock plastic zone,Roadway support