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
Features and Advantages
Particularly suitable for difficult ground conditions.
An efficient installation since drilling, placing and grouting can be performed in a single operation, saving both time and money.
Self-drilling system eliminates the requirement for a cased borehole in collapsing soils.
Fast, single-step anchoring system with simple equipment able to work with standard track drill (top hammer) or hand-held drilling equipment, eliminating the need for larger casing rigs.
Installation with simultaneous drilling and grouting possible, and post grouting system is simple.
Continuously drilling and grouting under high pressure causes the grout to permeate into looser soils and creates a bulb-effect for increased bond capacity.
Easy installation in all directions, also upwards, and similar installation methods for all ground conditions.
Suitable for working in limited space, height and in areas of difficult access.
Galvanizing for enhanced corrosion protection is available if necessary.
Multiple ranges of drill bits suitable for different ground conditions.
Continuously threaded bar pattern can be cut and coupled anywhere along its length to achieve all lengths.
Outside Diameter (mm)
Internal Diameter (mm)
Ultimate Load Capacity (kN)
Yield Load Capacity (kN)
Tensile Strength, Rm (N/mm2)
Yield Strength, Rp0.2 (N/mm2)
Thread Type (left-hand)
MAI T76 Standard
EN10083-1 (Alloy Structure Steel)
Compared to carbon steel, alloy structure steel has high anti-corrosion capacity and high mechanical.
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: