Construction Grouting Reinforcement Technology of High Roof Falling Zone in Mine Inclined Shaft Under Condition of Plateau Permafrost

In order to solve the high difficult construction of the high roof falling zone in the mine roadway under the plateau permafrost environment, with the site measurements and the TSP200 advance geological prediction technology, the paper analyzed the surrounding rock and the hydrological conditions in front of the headi ng face.According to the low temperature, low atmospheric pressure and low mechanical consumption under the plateau permafrost environment affected to the constru ction of the pipe rammed curtain, an advance support plan with large pipe shield curtain and grouting was provided and a TT350 pipe ramming hammer was selected fo r the construction of the pipe rammed curtain.The results showed that the construction technique of the pipe rammed curtain and grouting support for the high roof fallin g zone in the mine roadway under the plateau permafrost environment could solve the restriction of the low temperature, low atmospheric pressure, mechanical degrad ation and other factors.A pipe rammed curtain construction with a single pipe of 30 m could be completed within 20 days and the construction efficiency was highly impr oved.