Features of active nets

1. Bolting: the raw material should choose the double-stranded form of Φ16 wire rope anchor, you can also use steel wire anchor; The bolt aperture and anchor length, the upper edge of the bolt design pulling force is not less than 80KN, the rest of the bolt design pulling force is not less than 50KN. The anchorage length should be determined according to the calculation and must not be less than 2m. The aperture of the steel bolt rod should be greater than the diameter of the rod body by more than 12mm; The aperture of the double-stranded wire rope anchor should be 2 times greater than the steel rope, and the diameter should be more than 10mm.

2. Wire rope mesh: the specification adopts D0/08/300 type steel wire rope mesh, 4mX4m mesh block should be selected, and other specifications of mesh block can be used at the edge when needed. The number of layers should be paved with a single-layer steel wire rope mesh, and when the local large-volume dangerous rock or rock pile, the reinforced active protection of the double-layer steel wire mesh can be considered, and the bolt pulling force should not be less than 104KN.

3. Support rope: the diameter of the transverse support rope should use Φ16 steel wire rope, the longitudinal support rope should use Φ12 steel wire rope, the area where the double-layer wire rope network is set up longitudinal and horizontal support rope should use Φ16 wire rope, the actual length of each support rope should be added 1m at both ends on the basis of the design laying length as the reserved length of fixed connection with the anchor. When the length of the support rope is L≤10m, 10m30m, each end of the support rope is fixed with 2, 3, or 4 rope cards of the corresponding model.

4. Suture rope: the diameter of the suture rope should be Φ8 wire rope, each wire rope net should be sutured with a suture rope, its length is determined by the ability to achieve the mesh and the surrounding support rope or the edge of the near net to determine, each end of the suture rope is fixed with 2 Φ8 rope cards.