Hollow Grouted Self Drilling Tunnel Rock Bolt Mining Anchor Bolt
Introduction Of Hollow Drilling Mining Rock Grouting Anchor Bolt
1, Hollow Drilling Mining Rock Grouting Anchor Bolt consists of
hollow core with continuous hot-rolled outside thread
2, Hollow Drilling Mining Rock Grouting Anchor Bolt can application
as injection anchor without casing, especially for non-stable
boreholes
3, self-drilling installation, utilization of the anchor bar as
drill rod with a single-use drill bit
4, easy extension of the anchor bars by anchor coupler
5, grouting or development of the grout body either simultaneously
with drilling using a rotary injection adapter or afterwards
6, assembly of the anchor head with the anchor plate and the nut,
stressing and locking
Specification
Anchor Bar
| Bar | R32L | R32N/21 | R32N/18.5 | R32S | R32SS |
| Outside Diameter (mm) | 32 |
| Internal Diameter (mm) | 22 | 21 | 18.5 | 17 | 15 |
| Cross Sectional Area (mm2) | 356 | 363 | 433 | 440 | 522 |
| Ultimate Load (kN) | 260 | 280 | 280 | 360 | 405 |
| Yield Load (kN) | 200 | 230 | 230 | 280 | 300 |
| Weight (kg/m) | 2.8 | 2.85 | 3.4 | 3.45 | 4.1 |
| Thread Type | ISO10208 |
| Type of Steel | EN10083-1 |
| Thread (Left / Right hand) | Left or Right |
| Length (m) | (1) x 2, x3, x4, x5, x6, x7, x8, x9 |
| Optional of Anti-corrosion | Hot-dipped Galvanization: ISO 1461 Epoxy Coating Bending properties up to standard ISO 1519 Impact properties up to standard ASTMD 2794 Adhesion up to
standared ISO 2409:2007 |
1. Connect the alloy drill and anchor rod one end, on the other
end, connect the drill sleeve and shank adapter ,then connect the
drilling rig or hand-held drill. Then start drilling, fill the
cooling water while drilling.( If you want to lengthen the anchor
rod, can connect the coupling, and then drilling)
2. Take down the drill, put the stop-grouting plug into the rod,
and insert it to the hole, then ready to grout. Special
circumstances like surrounding rock grouting tension is over or
surrounding rock is too broken, can use anchor agent to seal the
hole.
3. Connect quick grouting coupling and anchor rod end, connect
other end of grouting machine.
4. Start grouting, when grouting full and reach design value then
power off . Grouting pressure according to the design parameters
and grouting machine performance determine ,Cement/sand reference
values is 1:0 ~ 1:1, water/cement reference value is 0.45:1 ~
0.5:1.
5. Install anchor plate and nuts, and tighten nuts.
