SPLIT SET? Stabilisers SS-33 PDF Print E-mail
splitset-stabilisers-ss33

Specifications and performance

The Split Set™ stabilizer is a slotted steel tube, with one end tapered for easy insertion into a drill hole. The other end has a welded ring flange to hold the bearing plate. The stabilizer is inserted into a hole slightly smaller in diameter than the tube using a simple driver tool fitted to the drill. As the tube enters, its diameter is compressed and the slot partially
closes. This exerts radial forces along the length of contact with the rock, providing the friction which holds the rock together. The driving force of the drill actively loads the bearing plate against the rock.

Tubes and plates are available standard or galvanized. Code stampings on the tube show its size, date and place of manufacture, and heat lot of steel. Split Set™ Mining Systems quality management system for Split Set™ products has been certified to the ISO-9002 international quality standard.

SS-33 tube Standard Galvanised
Length
mm
Weight
kg
CPN Weight
kg
CPN
450 0.7 90321076 0.7 90321662
600 0.9 90321324 0.9 90321670
900 1.4 72237936 1.5 90321688
1200 2.0 72237944 2.1 90321696
1500 2.4 72237951 2.6 90321704
1680 2.6 90321316 2.8 90321712
1800 2.9 72237969 3.1 90321720
2100 3.4 72237977 3.6 90321738
2400 3.8 72237985 4.1 90321746

Model SS-33 Split Set™ stabilizers are 33mm in diameter. All Split Set™ Stabilizers are packed 150 per pallet.

Domed bearing plate

Split Set™ domed bearing plates uniquely combine high strength with light weight, and are integral parts of the Split Set™ system.

  SS-33 dome plate Standard Galvanised
Dimensions
mm
Weight
kg
CPN
 
Weight
kg
CPN
 
150 x 150 x 4
125 x 125 x 4
0.7
0.5
90320250
90322538
0.8
0.5
90322447
90322546

Installing the SS-33 stabilizer

The SS-33 tube has a nominal outside diameter of 33mm. The length chosen should be the same as with other types of rock bolts, and installed with the same spacing.

The stabilizer is installed with the same drill used to make the hole. Split Set™ stabilizers are commonly installed with jacklegs, stopers, jumbos and automatic bolting machines. Almost any hydraulic drill, or any percussive air drill with a bore of 2-5/8 inches (66 mm) and operating at 90 psig (6 bar), will have sufficient impact. 

SS-39 drivers
Standard
Shank size
 Inches(mm)
Weight
kg
CPN
 
Short-nose
Long-nose
 7/8 x 4-1/4 (22 x 108)
 7/8 x 4-1/4 (22 x 108)
1.1
1.3
72243405
90324518


SS-33 drivers
Rope-threaded

Steel size
Inches mm

Weight
kg
CPN
Short-nose
Long-nose

1 (25)
1 (25)

0.9
1.0
90321019
90325507

SS -33 driver tools

A simple driver tool adapts the drill for easy stabilizer insertion. One end fits the tube; the other fits the drill chuck or drill steel. All genuine Split Set™ driver tools are made of high-strength heat-treated alloy steel, designed for long life, and precision-made for the proper fit.    

For jackleg or stoper insertion, a long-nose or short-nose driver tool may be used. The short-nose tool is also used for driving an SS-33 Split Set™ utility hanger inside an installed SS-33 Split Set™ stabilizer.    

Rope-threaded drivers are available to fit drill steel for jumbos and bolters, and for long reach with jacklegs and stopers.

SS-33 utility hangers

Split Set™ utility hangers are available in 46 and 61cm tube lengths to support light loads such as cables, vent tubing and pipes.

Also, utilities hangers can be driven inside installed Split Set™ stabilizers, by aligning the hanger slot with that of the stabilizer. This permits easier installation of mesh, after the ground is secured by the stabilizers.

SS-39 utility hangers
Length
(mm)
Weight
(Kg)
CPN
 
Standard
457
610
Galvanized
457
610
Standard
0.8
1.0
Galvanized
0.8
1.0
Standard
90321076
90321324
Galvanized
90321662
90321670

SS-33 installation and pull testing 

Bit selection and drilling

To select the correct drill bit diameter for meeting the recommended initial anchorage of 3 to 9 tons, drill several holes with bit diameters ranging from 1-3/16 to 1-5/16 inch (30 to 33 mm). Drill each at least 2 inches (5cm) longer than the bolt length. Number each hole and record the bit size.( In soft ground, a bit may drill a hole larger than its diameter. In hard abrasive ground, the hole may be the same diameter as the bit.)   

Drive into each hole an SS-33 Split Set™ Stabiliser fitted with a pull collar  and spacer collar as shown. Record the driving time for each stabilizer. After insertion, observe the amount of slot closure inside each stabilizer.

Once the bolt has slipped in the hole, pressurize the tester pump until the bolt slips again. The same pull load should cause subsequent slippage. 

Interpreting test data

After the above pull tests are completed, draw two graphs:

  • Spacer         (a) Anchorage versus bit diameter.
  • Pull collar      (b) Anchorage versus driving time. 

Use the first graph to determine the correct bit size for your particular ground condition. As the bit wears, the hole will become smaller and friction will increase until the bit is replaced or the drill can't drive the bolt completely. 

Use the second graph to establish correct driving time required for this ground and bolt length. With a given bit, drill, bolt length, rock characteristic and constant pressure, insertion time will be proportional to initial anchorage. 

It's important to establish this data for use in later spot checks, to assure that proper installation techniques are still being used.

SS-33
pull collar
and
spacer set

Weight
Kg
CPN
0.2 90320888

To determine anchorage, perform a pull test. Align the pull tester with the stabiliser, and pressurize it until the stabiliser slips in the hole.   

Watch to be sure that it is actually the stabiliser that has slipped. When building up the pull load on the stabiliser, various adjustments may occur such as realignment of the tester housing, bearing plate settling, or localized rock crushing. These must not be mistaken for tube slippage. 

Application Engineering Service

The Split Set™ Stabiliser is a unique rock stabilization and support system.   

It interacts with the rock differently from other rock bolts. For this reason, Split Set™ Mining Systems offer a free application engineering service to assist you in the selection of the proper Split Set™ Configuration for your needs. We will also assist in determining the best way to use your existing equipment for the job, the best drilling procedure, and appropriate tools and accessories for your equipment and space limitations.  

We urge you to take advantage of this service. Our ground support technical representatives will be pleased to make the arrangements.

SS-33 Pull Test Equipment

The pull tester consists of two assemblies: the hydraulic portion which includes the cylinder, gage, pump, hose and adapter; and the mechanical portion which includes the claw, housing, U-shaped bushing, spindle and nut.

With the bushing removed, the claw can be slid over the pull collar which has been installed with the stabiliser. When the housing and cylinder are raised, the bushing can be inserted between the nut and the cylinder. The nut is then tightened to take up slack.

The pump is then actuated to raise cylinder pressure, pulling the stabiliser slightly out of the hole through the bearing plate.

Maximum gage reading at slip indicates the holding force. The device can be used for slip loads up to 12 US tons (10.9 metric tons), this will depend on the type of hydraulic cylinder being used.

SS-33 Pull Tester
Description Weight
Kg
CPN
Pull tester assembly
Mechanical portion
Hydraulic portion
Hydraulic parts
Cylinder
Gage
Pump
Hydraulic hose
Gage adapter
Mechanical parts
Claw
Housing
Bushing
Spindle
Hex nut
12.5
5.4
7.1

3.2
0.7
2.3
0.9
0.1

1.5
2.5
0.5
0.8
0.1
90320904
90321290
90321415

90320177
90320193
90320169
90320185
90320201

90320896
72233422
72233430
72233414
95084778
 

Accessories for SS-33

  • Flat Plate - Multi Hole

    plate-multihole Multi Hole Plates are generally used for Cable Bolts. Flat Plate provides a "Stiff" support to the rock surface that are relatively flat.

  • Dome Plate SS33

    plate-dome-ss33Used with installations of SS33 Split Set Stabilisers.
    The SS33 Dome Plate is a  125mm x 125mm x 4mm Dome Plate

  • Duo Plate SS33

    plate-duo SS33-300 x 280mm Duo Plate:- 300mm x 280mm x 1.6mm Strata Plate
    (SS33-125mm x 125mm x 4mm Dome Plate pressed together)

  • Strata Plate

    Strata Plate Can be used with both flat and domed plates up to 150mm Square.

  • Flat Plate - Single Hole

    plate-singlehole Multi Hole Plates are generally used for Cable Bolts. The additional holes are used to allow Extra Cable bolts to be used in each installation Flat Plate provides a "Stiff" support to the rock surface that are relatively flat.