Heading and Support Technology of Metal Mine Roadway Passing Through Argillized Diorite Fault

LIU Ning

doi:10.3969/j.issn.1002-6029.2014.02.005

Abstract：In a construction of a -390m level roadway in Baixiangshan Iron Mine ,the roadway had to pass through a broken zone of an argillized diorite fault with obvious water flow.A pipe shield method in combination with the measures of the surface grouting ,working face grouting and advance small guide tube grouting was applied to the water prevention and control and the fault status was proved with advance borehole drilling.During the construction operation ,the mine roadway behind 5m of the working face was enlarged and supported ,a pipe shield was applied to the drilling site and the pipe shield and geological drilling were conducted with a hydraulic drilling rig.During the drilling opera-tion ,when a water inflow and borehole collapsed occurred ,a grouting operation would be timely con-ducted and a borehole reaming and re-drilling operation would be conducted in order to ensure the borehole with a depth over 5m in the stable rock stratum.When the geological drilling and advance pipe shield construction completed and the construction was at the broken zone ,an advance small guide tube grouting and roof control technology was enhanced in combination with the a shallow borehole blasting and short sectional heading and support.The mine roadway was safety and successfully passed through the broken zone of the fault.