Pipe Shield Support Technology of Mine Roadway Passing Through Complicated Fractured Zone

In order to solve the difficult support problem when mine roadway passing through complicated fractured zone, based on Kailuan Donghuantuo Mine as a study object, the pipe shield support technology of the mine roadway passing through the complicated fractured zone was conducted and a system of the pipe shield support technology was formed.A calculation method of the protection zone thickness above the pipe shield working room and the borehole pattern method of the pipe s hield were obtained.The results showed that with the coreless drilled dry concentric simultaneous casing dilling, punched pipe wall protection, high density grouting an d other comprehensive technology, outburst prevention drilling and stable pressurized grouting could be realized in the high water pressure, high geostress and easy m udding complicated fractured zone to provide a safety protection to the pipe shield support of the mine roadway.