Study On The Comprehensive Technique About Surrounding Rock Control And Bolting Of Coal Roadway With Broken Roof

Based on theory analyse and site-test, the mechanical character of broken roof of coal roadway and its varying principle has been studied in detail. Bolt action niechanical principle has been explained, dynamic design method and monitoring method (information design method) about bolting has been put forward, and a comprehensive bolting technique has been established. Using modern science method such as theory analysis method, numerical simulating method, site-test and so on, bolting has been designed. This technique has been used successfully in the air-return gate oJ' 1310 fully mechanized roof coal caving face in Zhangcun Coal Mine. The remits indicate that bolting method is suitable to coal roadway, and it has many advantages, such as good supporting effect, rapid construction, safe and economical etc. and makes the technical problem of broken roof support of coal roadway solved.The research results of this paper provide some theory references and engineering experiences for the further studies on bolting technique.