Supanchor T30/11 Underground Mining Roof Bars/ Anchors/ Rockbolting Drilling Bit Rock Drill Bit

Product Description

 

Product Parameters

 

Product Name	Hollow bolts / Hollow anchor / Self drill anchor / Grouting drill anchor bar / Rock anchor
Standards	GB1499.2-2007 GB 50086-2015 TB/T 3209-2008
Grades	Carbon	45#, sae1045, aisi1045
	Alloy	40Cr, JIS SCr440, ASTM 5140, ISO 41Cr4
Certificate	We are SGS approved enterprise, we issue MTC and be responsible for the quality.
Outside diameter	25mm, 25.4mm, 28mm, 28.3mm, 30mm, 32mm, 38mm, 40mm, 51mm, 76mm or as per required
Thread standard	ISO 10208 / ISO1720
Tolerance for OD	+0mm/-0.2mm
Length	1.5m, 2m, 3m, 4m, 5m, 6m, or as per clients request
Surface treatment	Black / oiled /galvanized or as per required.
Heat treatment	Annealed
Test	Yield strength test, Tensile strength Test, Chemical composition
Accessories	normal head, Alloy bit, expanding head, hex-nut, slurry seal, connector, plate
Packing	Wrapped by anti-water plastic clothes, each bundle two hoisting belts
Application	pre-support, radial support, slope stabilization, foundation support , soil nail, retaining wall, etc.
Shipping term	In bulk / FCL / LCL, partial shipment allowed
Shipping port	Qingdao, or Tianjin port
Third party inspection	Acceptable
Trade term	CIF, CFR, FOB, EXW
Delivery time	Within 7 days for stocks supply.
Paying term	30%TT + 70% TT against copy of documents, or 30%TT + 70% LC.

Product Description

The product is composed by hollow anchor bar, anchor nut, anchor plate, anchor coupler, drill bit, and the hollow anchor bars can be cut and lengthened by coupling on request.  Self drilling anchoring system is an advanced system which can ensure the anchoring effect for complex ground conditions. It can be integrated with the functions of drilling, grouting and anchoring.  It can be used in railway system, metro project and infrastructure . As an efficient anchoring method, it's also widely used for pre-support, radial support, slope stabilization, foundation support , soil nail, retaining wall, etc.

 

Application
Railway System
Metro Project
Slope Stabilization
Hydroelectric Station
Infrastructure
Mining

 

Hollow Rock Anchor Bars Accessories

1. Anchor head: the barb on the anchor head can position the anchor rod in the drilled hole, and the rod body is well centered.

2. Anchor bolt body: the most important structure in the assembly, which plays a major role in anchoring and support.

3. Grout stop plug: maintain the grouting pressure during the grouting process, so that the grout can fully fill the gap of surrounding rock.

4. Base plate: bear greater surrounding rock stress.

5. Nut: concentrate the surrounding rock stress on the base plate.

Hollow Rock Anchor Mechanical Properties

 

Size	O.D(mm)	I.D(mm)	Ultimate Load(KN)	Yield Load(KN)	Weight(kg/M)
R25N-14	25.0	14.0	200	150	2.3
R32L-22	32.0	22.0	210	160	2.8
R32N-21	32.0	21.0	280	230	2.9
R32N-18.5	32.0	18.5	280	230	3.4
R32S-17.5	32.0	17.5	360	280	3.5
R32S-15	32.0	15	360	280	4.1
R38N-21	38.0	21.0	500	400	4.8
R38N-19	38.0	19.0	500	400	5.5
R51L-38	51.0	38.0	550	450	6.0
R51L-36	51.0	36.0	550	450	7.6
R51N-36	51.0	36.0	800	630	7.6
R51N-33	51.0	33.0	800	630	8.4
Steel grade		Acc. to EN10083-1
Thread direction		Left hand
Thread standard		ISO 10208 / ISO1720

 

Characteristics & features of hollow grouting anchor rod

1. Combine the functions of anchor rod and grouting pipe into one. It is a grouting pipe during grouting, and becomes an anchor rod without pulling out after grouting.

The hollow design enables the anchor rod to realize the function of the grouting pipe, and avoids the mortar loss caused by the pulling out of the grouting pipe in the traditional construction process.

3. The grouting is full, and the pressure grouting can be realized, which improves the project quality.

4 due to the role of various accessories, the rod body is well centered. The mortar can wrap the whole length of the bolt body, avoiding the risk of corrosion and achieving the purpose of long-term support.

5. It is easy to install. It is not necessary to process threads on site. It is convenient to install base plates and nuts.

6. Safe, reliable, and time saving. Self drilling system eliminates the requirement for a cased borehole.

7. Simple installation & operation.

8. Choice of drill bits for different ground conditions.

9. Grouting works synchronize with drilling or after drilling. Grout can fill fractures effectively. 

10. Anchor bars can be cut and lengthened on request, applying to narrow spaces.

11. It provides higher bonding stress than smooth steel pipe depending on continuous wave thread.
It is the only anchoring system in China that has completely solved many problems of traditional anchoring support at present, combined with the supporting special grouting pump and grouting technology.

Product installation process

1) Drilling: drill and clear the hole with ordinary rock drill.

2) Insert anchor rod: insert the hollow grouting anchor rod with installed anchor head into the hole, and the barb on the anchor head will immediately hang the anchor rod.

3) Install the grout plug, backing plate and nut.

4) Connect the grouting machine: connect the end of the anchor rod with the selected grouting machine through the quick grouting joint.

5) Grouting: start the machine for grouting. If pressure grouting is required to improve the surrounding rock structure, just wait until the pointer on the pressure gauge rises to the design pressure.