Abstract:
It is very difficult to support expansive soft rock roadway, because of the bad characteristics of soften in water, low intensity and strong rheological behaviors. On the basis of traditional process of bolt-shotcrete and bolt-grouting, three kinds of support ways are applied in different types of soft rock. The support methods are combined support with yielding support of large section and thin shotcrete, combined support with large section anchor network, shed, shotcrete, bottom arch and grouting, totally enclosed double layer reinforced concrete. The application showed preferable supporting effect and successful rate of first support was close to 70%.