Study on Pre- Stressed Coordinated Support Technology of Deep Mine Roadway

In order to solve high difficult support problems of the mine roadway with high stress and broken surrounding rock in a deep complicated area of some m ine,a similar simulation,numerical simulation and theoretical analysis method were applied to study the pre-stressed coordinated support technology.With the loose circl e measured and tested,the loose and failure scope of the roof,floor and two sidewalls of the mine roadway were determined individually as 1.92,1.101 .40,2.50 m.Thus t he support measures with the bolt-steel mesh-anchor were provided for the mine roadway with high stress and broken surrounding rocks in the deep complicated area 0 f the mine.The pre-stressed coordinated support technology was selected.The pre-stress of the anchor and bolt selected were 100 and 40 kN individually.The row dista nce of the bolt comprehensively considered was 800900 mm.The deformation observation of the mine roadway was conducted.The results showed that the two sidewall deformation value of the mine roadway with the pre-stressed coordinated support technology was reduced from 280.0 mm of the conventional support to 95.5 mm,the ro of deformation value was reduced from 47.0 mm to 43.2 mm and the mine roadway was steadily in stable.