Shandong Tongrui Mining Technology Co., Ltd.
Main products:Rock Bolt,Friction Bolt,Cable Bolt,Thread Bar Bolt,Mining Plate
Contact Us
  • Contact Person : Mr. wang yunlai
  • Company Name : Shandong Tongrui Mining Technology Co., Ltd.
  • Tel : 86-538-6366599
  • Fax : 86-538-6366597
  • Address : Shandong,taian,No.7 in North Road of Manzhuang Steel Market
  • Country/Region : China
  • Zip : 271000

Roof Bolt for Mining Support

Roof Bolt for Mining Support
Product Detailed
Roof Bolt for Mining Support 1.Material: steel 2.Fuction : used as rock bolt 3.Diameter : 33mm 39mm 42m

:Roof Bolt for Mining Support

is used together with dome plate and net for reliable ground support in mines, tunnels, slopes, or wherever .



(1)Split Sets Bolt is made from high strength steel tube that is a slotted steel tube, with one end tapered tip for easy insertion into a drill hole. The other end has a welded ring for holding the bearing plate. A ring, or collar, is welded on the outer end to hold a domed plate to the rock surface.

(2)The bolt is inserted into a hole slightly ,the diameter of hole is smaller than the tube. When drive the rock bolt into the hole, the tube of bolt is compressed and the slot is partially closed ,that make the strata and the bolt be a whole body,.all strain of bolt wiill support to the strata tightly. When surrounding rock is shaked by explosion, anchor capacity increasesed higher and supporting effect is perfect.

(3) Fast and easy installation with hand held or mechanized equipment .

(4) Be used in a variety of ground conditions for immediate ground support, but is not suitable for very soft strata and permanent support.

(5)Provide support in radial and axial direction .

2.Recommended hole diameter calculation:

(1)In The Rock Stratum :

 Diameter of Hole: (0.9-0.95) × Diameter of Bolt

 Depth of Hole: Length of Bolt +100mm

 Deflection Rate of Drilling : min1%

(2)In The Coal Stratum:

 Diameter of Hole: (0.9-1.00) × Diameter of Bolt

 Depth of Hole: Length of Bolt +200mm

 Deflection Rate of Drilling : min1.5%


Tapered Tip Diameter A1-1/8” (28 mm)1-3/16” (30 mm)1-1/2” (38 mm)
Tapered Tip Length B2-3/8” (60 mm)2-1/2” (65 mm)2-1/2” (65 mm)
Slot Width C1/2” (13 mm)5/8” (16 mm)7/8” (22 mm)
Steel Thickness D3/32” (2.5 mm)3/32” (2.5 mm)1/8” (3 mm)
Rod Diameter E1-5/16” (33 mm)1-1/2” (39 mm)1-13/16” (46 mm)
Technical DataFS-33FS-39FS-46
Hole Diameter1-3/16” to 1-5/16”(31 to 33 mm)1-3/8” to 1-1/2”(35 to 38 mm)1-11/16” to 1-3/4”(43 to 45 mm)
Bolt Lengths3’ to 8’(0.9 to 2.4 m)3’ to 10’(0.9 to 3.0 m)3’ to 12’(0.9 to 3.7 m)
Tensile Strength24,000 lbs(107 kN)28,000 lbs(124 kN)40,000 lbs(178 kN)
Yield Strength16,000 lbs(71 kN)20,000 lbs(89 kN)30,000 lbs(133 kN)
Initial Anchor Capacity3 to 6 tons(27 to 53 kN)3 to 6 tons(27 to 53 kN)6 to 10 tons(53 to 89 kN)
Ultimate Axial StrainTypical 16%

Roof Bolt for Mining Support

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