Add to Cart
Mining Rock Bolts Self Drilling Anchor System Drilling Tools For Reinforcement
The self-drilling hollow bar anchor system consists of a hollow
threaded bar with an attached drill bit that can perform drilling,
anchoring and grouting in a single operation. The hollow bar allows
air and water to freely pass through the bar during drilling to
remove debris and then allow grout to be injected immediately after
drilling is completed. Grout fills the hollow bar and completely
covers the entire bolt. Couplings can be used to join hollow bars
and extend the bolt length while nuts and plates are used to
provide the required tension.
Self-drilling hollow bar anchor system is the most common used
system for rock mass stabilization, especially in tunneling,
underground mining and ground engineering industry. It is mainly
used for the supporting engineering in the loose and broken rock
stratal with difficult to drilling hole. It provides the optimal
solution for soil nailing, lock bolting, micro-piling.
Self-drilling hollow bar anchor system fulfills current and
increasing demands of the tunneling, mining industry and ground
engineering for safer and faster production. The system provides
advantages for all areas of its applications, where boreholes would
require the time consuming drilling with casing systems in
unconsolidated or cohesive soil.
Features and Advantages
Specification
Anchor bolt
Item | R25N | R32N | R32S | R38N | R51L | R51N | T76N | T76S |
Outside Diameter (mm) | 25 | 32 | 32 | 38 | 51 | 51 | 76 | 76 |
Internal Diameter (mm) | 14 | 19 | 16 | 19 | 36 | 33 | 52 | 45 |
Ultimate Load Capacity (kN) | 200 | 280 | 360 | 500 | 550 | 800 | 1600 | 1900 |
Yield Load Capacity (kN) | 150 | 230 | 280 | 400 | 450 | 630 | 1200 | 1500 |
Tensile Strength, Rm (N/mm2) | 800 | 800 | 800 | 800 | 800 | 800 | 800 | 800 |
Yield Strength, Rp0.2 (N/mm2) | 650 | 650 | 650 | 650 | 650 | 650 | 650 | 650 |
Weight (Kg/m) | 2.3 | 3.2 | 3.6 | 5.5 | 6.5 | 8.0 | 16.0 | 19.7 |
Thread Type (left-hand) | ISO10208 | ISO1720 | MAI T76 Standard | |||||
Steel Grade | EN10083-1 (Alloy Structure Steel) | |||||||
Compared to carbon steel, alloy structure steel has high anti-corrosion capacity and high mechanical. |
Anchor Plate
Item | R25N | R32N | R32S | R38N | R51L | R51N | T76N | T76S |
Dimention(mm) | 150*150 | 200*200 | 200*200 | 200*200 | 200*200 | 250*250 | 250*250 | 250*250 |
Thickness(mm) | 8 | 10 | 12 | 12 | 20 | 40 | 40 | 40 |
Hole diameter(mm) | 30 | 35 | 35 | 41 | 60 | 60 | 80 | 80 |
Weight(KG/PC) | 1.4 | 3 | 3.7 | 3.6 | 8.8 | 18.5 | 18 | 18 |
Cold deformed with geometry |
Anchor Coupling
Item | R25N | R32N | R32S | R38N | R51L | R51N | T76N | T76S |
Outside diameter(mm) | 35 | 42 | 42 | 52 | 63 | 63 | 95 | 95 |
Length(mm) | 120 | 145 | 160or190 | 180 | 180 | 200 | 200 | 200 |
Weight | 0.45 | 0.7 | 0.75 | 1.4 | 1.7 | 1.9 | 6.4 | 6.4 |
Machined steel coupling middle stop |
Drill Bit
Item | R25N | R32N | R32S | R38N | R51L | R51N | T76N | T76S |
diameter(mm) | 41,51 | 51,76,90 | 90,100,110,115,130 | 130,150,160,180,200 | ||||
Hardened cross bit (EX) | Hardened cross bit for loose to medium dense condition with small boulders. | |||||||
Tungsten cross bit (EXX) | TC cross bit for soft to medium rock for mations | |||||||
Hardened button bit (ES) | Hardened buuton bit for unconsolidated rock with boulders. | |||||||
Tungsten carbon button bit (ESS) | Button bit with TC inserts for medium rock for formations. | |||||||
Hardened arch bit (EC) | Hardened drill bit with optimized geometry for unconsoliddated soil with small boulders. | |||||||
Tungsten carbon arch bit (ECC) | TC drill bit with optimized geometry for soft to medium rock formations. | |||||||
Hardened drop center bit (EY) | Hardened cross bit for loose to medium dense ground conditions | |||||||
TC drop center bit (EY) | TC drill bit for soft to medium rock formations. | |||||||
Casting clay bit (EW) | Casting clay bit with optimized geometry for very soft to soft caly. | |||||||
Machined steel bit or Casring steel bit |
Anchor Nut
R25N | R32N | R32S | R38N | R51L | R51N | T76N | T76S | |
Key size(mm) | 41 | 46 | 46 | 50 | 75 | 75 | 100 | 100 |
Length(mm) | 135 | 45 | 45 | 55 | 70 | 70 | 80 | 80 |
Weight(kg/pc) | 0.25 | 0.35 | 0.35 | 0.5 | 1.55 | 1.55 | 3.6 | 3.6 |
Machined steel nut or casting steel nut |
About us
MIROC® Rock Drilling Tools are Rock Drilling Tools Brand by KSQ
Tecnologies (Beijing) Co. Ltd.
KSQ Technologies (Beijing) Co. Ltd. provides exceptional technical
know-how in development, production, and application. The company
has adopted advanced manufacturing processes to ensure high quality
steels and tungsten carbide inserts for its rock drilling
accessories. Its personnel understand clients’ drilling needs, and
have the service skills to recommend the right drilling tools for
the job. Its experienced product developers can also create custom
tools. Furthermore, the company’s development team introduces
innovative products each year – tools that are rigorously tested in
the field and proven
to perform beyond industry expectations.
MIROC® Rock Drilling and Ground Support Tools include:
Integral Rods
Plug Hole Rods
Tapered Drilling Tools
Extension Drilling Tools
Drifting and Tunneling Tools
Reaming Tools
Shank Rods
Shank Adapters (Striking Bars)
Down-the-hole (DTH) Bits
Down-the-hole (DTH) Hammers