Abstract:

The stability of the structural development parts of the phosphate rock body is often poor，

and the roadway is prone to roof fall and rib spalling，and the support is difficult，which seriously restricts

the safe production of the mine.In order to solve the support problem in the construction of underground min⁃

ing roadway in Motianchong Phosphate Mine，through the comprehensive analysis of the complex geological

conditions and construction status of the mine，and comparing the roadway construction and support meth⁃

ods under similar geological conditions，it is decided to adopt the combined support method of steel arch，

advanced short pipe roof and shotcrete to support the roadway.Practice has proved that the combined support

of steel arch，advanced short pipe roof and shotcrete can quickly support the surrounding rock and seal the

surrounding rock in the area where the surrounding rock is extremely unstable. The overall strength of the

support body is high，which can effectively ensure the safety and stability of the roadway and ensure the safe

production of the mine.

Key words:

phosphate mining, steel arch, advanced short pipe roof, advanced support