Research and application of the new support system in high stressed soft rock drift

摘要

The new polypropylene fiber concrete bar shell bolting shotcrete support system was studied on the basis of the analysis for the mechanics principle of shell structures and polypropylene fiber concrete.The new polypropylene fiber concrete bar shell bolting shotcrete support system was a new kind of bolting and shotcrete supporting forms.The technique feature is a kind of specially three-dimensional bar-mat reinforcement.It has very high mechanical property and was applied in difficult drift.The model experiment was done by relying on the industrial test and the distortion, destruct shape, developmental rule of the supporting system was examined while the stress and strain distributing rule and also the ultimate load were obtained.Field application shows that without reducing the carrying capacity of supporting the case, and heavy metal stent compared to the steel supporting the form of reduced consumption and the amount of concrete rebound, and has good flexibility, is an excellent soft rock drift jean pressure retaining structure, and has good prospects for widespread application.