Abstract: The supporting effect of broken rock mass roadway is related to the mine safety and the supporting cost， which is the key focused by mining academia and industry. Taking an iron mine as engineering background， the deformation of the broken rock mass roadway was analyzed theoretically by using the theory of fracture zone and plastic zone， and the range of loose zone in the broken rock mass roadway was measured by ultrasonic instrument. Then， the combined support method of bolt， metal mesh and shotcrete is proposed based on the theory of loosening circle. A support of short anchor arching and long anchor suspending was formed with long anchor cable supplemented. The support effect under different row spacing of bolts was analyzed by FLAC3D numerical software. The results showed that the support spacing of 0.7 m ×0.8 m can reduce the plastic zone and deformation， and also effectively lower the self-stability time， with good support effect.

Key words: Broken rock mass roadway, Support technique, Numerical simulation, Engineering application