Roadway Deformation Failure Characteristics and Supporting Technology Under Complex Surrounding Rock Conditions

According to the problems in Dafosi coal belt transport roadway,the deformation failure characteristics of roadway are analyzed under the complicated surrounding rocks conditions by the engineering geology survey and theoretical analysis method,and the characteristics of surrounding rock,floor mudstone water swelling,mining influence and uncoupled support structure are the dominant factor to lead to large deformation of roadway.The paper proposed "high strength and high prestressed anchor(cable) + floor anchor"to control the surrounding rock stability of roadway.Engineering application results show that the support form can effectively control the surrounding rock severe deformation of roadway and greatly improve safety performance.