Application
- Resin bolt type RM-20 i POK-22 are used for roof and ribssupport in mine working areas as an independent or additional roof support system. They are also used to suspend various components of mining equipment.
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Resin bolts type RM-20 , POK-22
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Technical description
- RM-20 bolt is a steel reinforcing bar of nominal diameter dn=20 mm, while POK-22 bolts have nominal rod diameter of dn=22 mm according to PN-82/H93215. They are made of 34GS steel.
Bolt | Rod type - standard rod | Rod type - coupled |
RM20 |
RM-20js RM-20ds RM-20js-k RM-20ds-k
|
RM-20js-dz RM-20ds-dz RM-20js-k-dz RM-20ds-k-dz
|
Bolt | Rod type - standard rod | Rod type - coupled |
POK- 22 |
POK-22js POK-22ds POK-22pr POK-22r
|
POK-22js-dz POK-22ds-dz POK-22pr-dz POK-22r-dz
|
- "k” mark means that the nut is connected with the rod by means of "SPIROL" ø3 or ø6 pin.
- "dz” means that the rod is made of two sections connected with M20 coupling sleeve of 55 mm in length.
- Finished RM-20 rods have a rolled top of ø16 mm beveled to 12 mm.
- POK-22 rods have a square 12 x 12 mm end. Such ends allow the rod to be turned in the hole.
- The bolts can be used with a square washer, square washer with a side hole or round washer made of 6mm plate.
Technical data
Rod diameter | dn = 20mm dla RM-20 dn = 22 mm dla POK-22 |
Thread | M20 |
Thread length | 150 mm |
Overall rod length | od 400 do 4000 mm |
Torque shearing the ø3 pin | 80 ÷ 120 Nm |
Torque shearing the ø6 "SPIROL" pin - (light) | 40 ÷ 60 Nm |
Torque shearing the ø6 "SPIROL" pin - (medium) | 90 ÷ 120 Nm |
Torque shearing the ø6 "SPIROL" pin - (heavy) | 140 ÷ 160 Nm |
Coupling sleeve: |
|
Sleeve diameter | ø 25 mm |
Thread size | M20 |
Sleeve length | 55 mm |
Bolt capacity required by regulations 120 kN | 120 kN |
Effective bolt capacity 180 kN | 180 kN |
Installation procedure
- Drill a hole of the depth equal to the rod length. Place the resin in the hole. Insert the rod and rotate while pushing causing the resin to mix. Leave until the mixture has cured.
While inserting the „k” rod the nut does not turn as it is joined with the rod by means of a ø3 or ø6 pin. After the adhesive has set, the pin is sheared by turning the nut.
While applying the „k” rod, the rod should be inserted to the hole with the washer on.
In the case of a two-part anchor, the rod should be connected with the M20 coupling sleeve.
Turn the M20 nut applying torque strength of at least 250 Nm in order to obtain the initial tension of at least 30 kN.
RM-20, POK-22 adhesive anchors have a Certificate issued by Central Mining Institute in Katowice allowing the product to be marked with the safety mark No. B/1194/II/2008
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