Abstract：According to the practical case of Fenghuangshan Mine，the destruction reason of support for previous roadway is analyzed. Combining the maintenance principle of pressure relief and support，the principle of pressure–relief support is interpreted with the consideration of wall rock creeping and pressure relief. Simultaneously，it is presented how to determine the parameters of pressure–relief support. The pressure–relief support is successfully applied to the upper return airway of working face 2322 of Fenghuangshan Mine. Compared with previous support，pressure relief support is of simple production process with lower maintenance costs，and it is very convenient to apply with significant social and economic benefits.
