Mine Layer
3.The ground base of the newly added chute in 4# tailings reservoir at Dexing Copper Mine is characterised by thick weathered layer,loose structure,fractured zone and landslip mass accumulation.As a result,the ground has a great subsidence and inefficient carrying capacity.In view of this, the grouting technology was adopted to reinforce the chute ground base.The on-site testing shows that the subsidence of the chute has been efficiently controlled and the carrying capacity of the ground base improved so that the stability requirement has been met.
5.Combining application in engineering project of Guqiao coal mine, such research about polypropylene fibre concrete shotcrete layer, taking into consideration a spectrum of technical factors as endurance, penetration-proof quality, economy and construction techniques, is analyzed in depth and described in this paper.

