The bolt-mesh-anchor support technology for soft rock roadway of Tunlan mine

The haulage roadway of Face 12501 of Tunlan mine was a large-section and soft-rock roadway.To solve the supporting problems of large deformation,the bolt-mesh-anchor support system was proposed in account of the geological conditions,the roadway layout and the deformation particularity of soft rock roadway.With the FLAC^3D numerical software in the program,the scheme was analyzed.The mine pressure of test roadway was observed.The result indicated that the maximum displacement of roadway roof and floor was 31 mm,the sides' was 43 mm,and the deformation velocity was lower than 0.5mm/d after the roadway was stabilized.The study had also revealed that the displacement of roof was mainly in the shallow,and the rock displacement out of 2.5m was very small.It shows that bolt-meshanchor support system can effectively control the deformation of large section soft rock roadway.