is for mechanical testing of swellex bolts

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ANALYSIS OF SWELLEX BOLT PERFORMANCE STANDARDIZED …

Dec 01, 1999· For grouted rock bolts like rebar, all the three components of strength exist at the bolt interface. However, for the fully frictionally coupled bolt, the "Split set" bolt, only a friction component exists at the bolt interface. For Swellex bolts, mechanical interlock and friction comprise the …

Introduction of Mechanical Dynamic bolts as part of ...

Mar 13, 2015· An inflatable bolt is integrated in the rock mass through the friction and mechanical interlock at the bolt–rock interface. The pullout resistance of the inflatable bolt is determined by the contact stress at the interface. The contact stress is composed of two parts, termed the primary and secondary contact stresses. The former refers to the stress established during bolt installation and ...

Swellex spartan | Epiroc US

Standardized Rock Bolt Pull Test Database. Thanks also to Francois Charette and Mario Bureau of Ltd. (the manufacturer of the Swellex bolt), for their assistance and for providing the background information regarding Swellex bolts and pull testing. I would also like to thank the

Swellex System Rock Bolts mail - YouTube

Installation As with mechanical rockbolts, Swellex are installed by inserting the bolt into a pre-drilled hole. Instead of adding torque to the inserted bolt, high water pressure is forced into the bolt which inflates it to the proper rock surface profile.

Montana Tech puts Epiroc Swellex bolts to the test ...

The Swellex bolt, which was developed ... frictional contact and mechanical interlocking at the bolt/rock interface ... Several rock bolt testing system were developed over the last two decades ...

Rock Reinforcement Products Product catalogue

As part of the test, sleeves will be used on bolts to qualify the critical bond length of Swellex bolts under forced displacement without loss of integrity in the bolts. The Pull Test Kit supplied will be essential to testing the bolts' load and deformation characteristics in that rock mass and borehole.

ROCK BOLT INSTALLATION - YouTube

5.1 Rock bolts are used for support in a variety of mining and civil engineering situations. 3 The pull test may be used to provide a quantitative measure of the relative performance of different anchor systems in the same rock type. Anchor systems may be different mechanical anchors or different bond materials or lengths for grouted anchors.

Field Performance Testing of Fully Grouted Roof Bolts, C ...

Dec 15, 2015· Testing studs at low temperatures. Impact testing, such as a blow with a hammer, should not be performed when studs or base plates are below 50°F (10°C). Instead, perform a tension test, bending the stud slowly with a tube. Testing studs welded to non-approved base plate material or in alternative positions

New Anchorage Capacity Testing System and Pull-Out ...

Apr 18, 2017· DS411 Rock Support Drill | Mining and Rock Technology - Duration: 3:17. Mining and Rock Technology Recommended for you

ANCHORAGE PULL TESTING FOR FULLY GROUTED ROOF BOLTS

of testing different types of rock bolt, such as me­ chanically anchored bolts, grouted rock bolts, fric-tional rock bolts (split-set and Swellex) and most cable bolts having capacities of less than 45 tons. 2. By evaluating the results of the anchorage ca­ pacity tests, the modified rock-mass rating (mRMR)

ASTM D4435 - 13e1 Standard Test Method for Rock Bolt ...

Swellex rock bolts can easily be pull tested. In fact, a Swellex rock bolt has the easiest pull test operation of any rock bolt type. Swellex Applications: Swellex rock bolts are extremely versatile and can be used in a variety of excavation, from tunneling to mining. A very typical application in tunneling is to use Swellex as pattern bolts to ...

Introduction of Mechanical Dynamic bolts as part of ...

- a mechanical assembly which includes a claw, stand, nut, & spindle ... • Suitable for tensioning Dywidag threadbar and testing virtually all types of rockbolts and soil nails • When testing Split Set, Swellex, or forged head bolts, the pull collar must be put onto the bolt ...

Ground support - QueensMineDesignWiki

ATS conducts Skidmore Bolt Testing procedures within its Mechanical Testing Division. Our labs are operated by trained experts who are familiar with the methods of using Bolt Tension Testers capable of handling up to 170,000 pounds to test components such as: Hex Bolts, Tension Control Bolts, Anchor Bolts, Studs, Lock Nuts, and Direct Tension Indicating Washers.

Performance of the Swellex Bolt in Hard and Soft Rocks ...

The "Swellex" bolt 1 is located within a second outer tube 10 which has a longitudinal slot 12. It will be seen from the drawing that the axial depression 2 of the "Swellex" bolt is located diametrically opposite the aperture 12 of the outer tube. The first tube ("Swellex" bolt)--second tube combination is located within borehole 20 of rock 25 ...

(PDF) A Review of Rock Bolt Monitoring Using Smart Sensors

shows the historical trends in roof bolt usage in the U.S. For many years, the most common fully grouted bolt installation was a 19 mm (0.75 in) bolt in a 25 mm (1 in) hole. In recent years, however, 16 mm (5/8 in) bolts have become more popular. The 1999 survey found that about 80% of all fully grouted bolts were the smaller diameter.

SWELLEX ROCKBOLTS Applications in Mining

Swellex Bolting System has proved its effectiveness for solving problems. features of Swellex bolts are highly valuable. Swellex can be used in a variety of ground conditions, are insensitive to water inflow and vibrations, and the length of the Swellex can almost be equal to the diameter of the tunnel.

Analytical models for rock bolts - ScienceDirect

SWELLEX PM12 Swellex rock bolts General information Swellex Pm12 Minimum breaking load 110 kN Minimum yielding load 90 kN Minimum elongation 10% Expansion pressure 300 bar For further information, see also technical data page 7. Minimum elongation "A": According to EN-ISO 6892-1 where applicable. Swellex Pm12 rock bolts Size Length (m) Weight (kg)

Procedures For Mechanical Testing of Stud Welds | PFSNO

D-Bolts. However, the idea was dropped in view of the fact that super swellex bolts are relatively weak in shear. • Since MD bolts are strong in shear due to 20 mm rebar inside a FS-47 mm split set, a decision was made to introduce MD bolts as an alternate to D-bolt particularily in broken ground conditions where D-bolts cannot be installed

Rockbolts and cables - Rocscience Inc.

The bolt is expanded inside the borehole drilled into the excavation wall. The installation process is easy and very similar to other rock bolt installation processes; making Swellex rock bolts accessible to all operators. Rock bolting systems are used to stabilize excavated rock …

Secoroc Rock Drilling Tools SWELLEX ROCK BOLTS

A special test bench pulls these anchors until they break and the results are monitored. Should an anchor fall short of the given tolerances, production is stopped and the ... install a Swellex bolt in the hole, leakages are not wanted. That's why each and every bolt is …

Analytical models for rock bolts - ScienceDirect

Swellex Spartan is making it's mark in the industry. The quality and reliability of theSwellex bolts is a well known fact. The Spartan has the same quality assurance a other Swellex bolt on the market.The pull test results obtained at AYMAR, S.A.U. is evidence of that.

Ground support - QueensMineDesignWiki

installing these bolts in downholes, the grout should be fed through the bolt to the end of the hole and the short tube used as a breather tube. Since the primary purpose of grouting mechanically anchored bolts is to prevent corrosion and to lock the mechanical anchor in place, the strength requirement for the

USA - Rock bolt system and method of rock bolting ...

Performance of the Swellex Bolt in Hard and Soft Rocks - Free download as PDF File (.pdf), Text File (.txt) or read online for free.

Swellex Rock Bolting System | Rock Reinforcement | Epiroc US

Mechanical Testing Don't Just Say It's Strong: Let Us Prove It. Mechanical Testing evaluates materials under conditions such as tension, compression and temperature. Laboratory Testing Inc. is equipped to provide the full range of mechanical testing services for …

Thiessen Pull Test Kit 30 TEAM

Dec 01, 1999· For grouted rock bolts like rebar, all the three components of strength exist at the bolt interface. However, for the fully frictionally coupled bolt, the "Split set" bolt, only a friction component exists at the bolt interface. For Swellex bolts, mechanical interlock and friction comprise the …