optimum vsl rock bolts

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  • VSL soil and rock anchors - STRUCTURAL TECHNOLOGIES

    2020-7-6 · (such as EMPA). In addition, VSL (Switzerland) Ltd. also has an ISO 9002 quality management system. Characteristics of VSL anchors VSL anchors are strand anchors. As grouted anchors, they can be used in both rock and soil. Their con-struction principle is always the same and the various types of anchors only differ in certain technical details.

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  • Bar systems | VSL

    Rock bolts are used to stabilise galleries during excavations and stabilise unstable rock and soil. They are supplied with different anchoring systems, grouted, with resin or mechanical anchors. They are supplied with Ø 20 mm – Ø 36 mm and ultimate loads of 175 kN – 560 kN.

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  • VSL GROUND ANCHOR SYSTEMS

    Soil nails, rock bolts, micropiles The VSL Bar system, which is available in B500 and S670 grades and diameters up to 75mm, is used for soil nails, rock bolts, micropiles and similar applications. The corrosion protection depends on the required service life, the consequences of failure of a group of anchors and on prevailing environmental conditions. VSL

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  • Ground anchors | VSL specialized leader

    VSL uses specially designed mechanisms to extract free lengths and even bond lengths. VSL Permanent strand ground anchors Permanent anchors are functional throughout the entire working life of the structure and require comprehensive corrosion protection.

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  • Bar systems | VSL specialized leader

    geotechnical systems such as soil nails, micropiles and rock bolts. concrete reinforcing systems, post-tensioning systems, marine-tie rod systems, anchors and form-tie systems. The VSL product line complies with international standards, including ISO, Eurocodes, ASTM, …

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  • VSL Ground anchor systems

    Soil nails, rock bolts, micropiles The VSL Bar system, which is available in B500 and S670 grades and diameters up to 75mm, is used for soil nails, rock bolts, micropiles and similar applications. The corrosion protection depends on the required service life, the consequences of failure of a group of anchors and on prevailing environmental conditions.

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  • Swellex Rock Bolting System | Rock Reinforcement |

    2021-7-5 · Designed as a daily support to provide safety and productivity for optimum control of the rock mass in mining and tunnelling. Made from specially engineered steel, these rock bolts offer high yielding and breaking load while perserving good elongation properties for safety.

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  • Optimum Industrial Sales – Wholesale Bolts and Nuts ...

    2021-7-4 · [email protected] Globe 0917-1788806 Smart/Sun 0922-8820242/0922-8820240/0933-8147334 Fax-(632) 411-6727 PHONE-(632) 921-7746 (632) 376-6466 (632) 514-7024 (632) 351-8951 (632) 415-8787 (632) 411-6727 (632)718-3501

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  • ANALYSIS OF SWELLEX BOLT PERFORMANCE

    2020-4-8 · An extensive study was conducted to determine the effets of rock rnass parameters and operational parameters on the performance of Swellex rock bolts, wherein pull test data was compiied from various mines in North Amenca and Europe. The data was statistically analysed. and the results.

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  • Principles of rockbolting design - ScienceDirect

    2017-6-1 · From the point of view of operation, the bolt length should be less than half of the opening height for roof bolts and half of the span for wall bolts in order to avoid installation difficulties: (1a) L b ≤ 0.5 H (for roof bolts) (1b) L b ≤ 0.5 B (for wall bolts) where L b represents the bolt length, H is the opening height, and B is the opening span. The bolt length is also associated with the bolting principle.

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  • Creating VSL Rock Bolts

    VSL CEME Issue October 1999 Creating Solutions Together VSL Rock Bolts - Information leaflet - Dom Nut Anchor plate Cement grout Resin Injection Expansion shell . Title: VSL …

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  • AnalyticalStudyoftheConfiningMediumDiameterImpacton

    2021-4-24 · of rock bolts can be plotted, representing the performance of rock bolts. For example, Skrzypkowski et al. [11] considered that the load-carrying capacity of segmentally installed rock bolts can be influenced by the bolting hole diameter. To investigate this impact, they conducted pulling tests on rock bolts with a diameter of 24mm.

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  • ANALYSIS OF SWELLEX BOLT PERFORMANCE

    2020-4-8 · An extensive study was conducted to determine the effets of rock rnass parameters and operational parameters on the performance of Swellex rock bolts, wherein pull test data was compiied from various mines in North Amenca and Europe. The data was statistically analysed. and the results.

    Get Price
  • Stabilization of Rock and Soil Slopes by Anchoring ...

    1983-1-1 · The bolts are regularly distributed on the slope at a maximum density of one bolt per 4 m 2 of the rock face. The bolts are of the deformed bar type, with a minimum diameter of 20 mm, and a thread at the external end. They are inserted into boreholes 34 to 38 mm in diameter and grouted with a thin grout along their entire length.

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  • DYWIDAG Geotechnical Product Range

    2020-9-24 · GEWl® Soil and Rock Bolts DYWI® Drill Soil and Rock Bolts Slope Stabilization and Sidehill Cuts The development and expansion of infrastructure – and, more specifically, the construction of high-speed corridors – poses significant requirements in terms of route planning. The expansion of motorways by adding more lanes often

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  • (PDF) Design of optimum roof support systems in

    Design of optimum roof support systems in South African collieries. ... Resin and Cable rock bolts were quite successful in terms of stability in pillars and tailgates. As a result of the studies ...

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  • Principles and methods of rock support for rockburst ...

    2021-2-1 · The three types of rock support used for rockburst control at present are soft support system using Split Set bolts, hybrid support system using rebar and two-point anchored yield bolts, and entirely yieldable support system using strong yield bolts. Previous article. in issue. Next article. in issue.

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  • Post-Tensioning and Geotechnical Systems - DSI EMEA

    2011-8-14 · VSL Bar Central Hidroeléctrica Porce III, Colombia - 2005 Soil nails, rock bolts, micropiles The VSL Bar system, which is available in B500 and S670 grades and diameters up to 75mm, is used for soil nails, rock bolts, micropiles and similar applications.

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  • Swellex Rock Bolting System | Rock Reinforcement |

    2021-7-5 · Rock bolts. Since its introduction 30 years ago the Swellex expandable rock-bolting system has gained wide recognition in the mining and tunneling industry. This unique rock bolt consists of a welded tube folded in upon itself, sealed at one end. It is re-expanded using a high pressure water flow provided by a special pump and adapter.

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  • Anchoring systems for geotechnical engineering

    2017-4-19 · In mines - The bolts reinforce the roof of the cavity to recreate a beam effect with the natural earth. On cliffs - The bolts stabilise the blocks to limit erosion. They can also be used to anchor the stone and rockfall mesh. In tunnels - The bolts reinforce the natural earth on the roof to create an arched effect. Soil nails & rock bolts

    Get Price
  • (PDF) Design of optimum roof support systems in

    Design of optimum roof support systems in South African collieries. ... Resin and Cable rock bolts were quite successful in terms of stability in pillars and tailgates. As a result of the studies ...

    Get Price
  • VSL PT Bar Montage - Coroflot

    2010-1-28 · products and services, VSL offers threaded bar systems for concrete reinforcing, anchors, and form ties, as well as geotechnical applications, such as soil nails, micropiles, and rock bolts. VSL bars have continuous cold-rolled threads in full 60-foot stock lengths, or as cut to project requirements. VSL’s

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  • System Description - DSI USA - dsiamerica.com

    DYWIDAG-Systems International (DSI) offers a complete product line in strand and bar post-tensioning (bonded, unbonded and external) as well as stay-cables and is thus able to fully serve the post-tensioning construction industry. DYWIDAG Post-Tensioning Systems have always combined the highest safety and reliability standards with the most ...

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  • Post-Tensioning System and Prestressing Steel Bars

    2020-4-20 · 2 The Williams System Williams Prestressing Post-Tensioning Systems consist of high tensile steel bars available in seven diameters from 1” (26 mm) to 3” (75 mm) with guaranteed tensile strengths to 1027 kips (4568 kN).

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  • Post-Tensioning Systems – Williams Form Engineering

    Williams’ Post-Tensioning System. Williams PreStressing Post Tensioning Systems consist of high tensile steel bars available in seven diameters from 1” (26 mm) to 3” (75 mm) with guaranteed tensile strengths to 1027 kips (4568 kN). They are provided with cold-rolled threads over all or a …

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  • Mining Supplies | NISS

    Mining Supplies Get A Quote What We Do Ground Support Power Distribution Ore Movement & Processing What We Do Ground Support Power Distribution Ore Movement & Processing NISS Manufacturing When you need high-quality, innovative tooling and wear items to keep your productivity promises, count on our manufacturing to deliver when and where you need it.…

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  • Macro-Micro Failure Mechanisms and Damage

    The anchoring mechanism of a bolted joint subjected to a shear load was investigated using a bilinear constitutive model via the inner-embedded FISH language of particle flow code based on the discrete element method. The influences of the anchoring system on the macro-/micromechanical response were studied by varying the inclination angle of the bolt.

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  • Rock and Soil Mechanics - whrsm.ac.cn

    2021-6-18 · Rock and Soil Mechanics (Monthly) is an academic journal about rock & soil mechanics and geotechnical engineering, started in 1979. It is sponsored by Wuhan Institute of Rock and Soil Mechanics, Chinese Academy of Sciences. Its ISSN is 1000-7598. Rock and Soil Mechanics is edited and published by Science Press.

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  • Reliability Based Optimum Design of Anchored Rock

    2020-2-21 · The target reliability based design optimization (TRBDO) is used to obtain an optimum length of the rock bolt and optimum anchor force required to stabilize the rock slope in order that the reliability index must meet a desired level of safety. ... Water pressure, Rock masses, Failure analysis, Slopes, Bolts Conference Information. Geo-Congress ...

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  • Swellex Rock Bolting System | Rock Reinforcement |

    2021-7-5 · Rock bolts. Since its introduction 30 years ago the Swellex expandable rock-bolting system has gained wide recognition in the mining and tunneling industry. This unique rock bolt consists of a welded tube folded in upon itself, sealed at one end. It is re-expanded using a high pressure water flow provided by a special pump and adapter.

    Get Price
  • VSL PT Bar Montage - Coroflot

    2010-1-28 · products and services, VSL offers threaded bar systems for concrete reinforcing, anchors, and form ties, as well as geotechnical applications, such as soil nails, micropiles, and rock bolts. VSL bars have continuous cold-rolled threads in full 60-foot stock lengths, or as cut to project requirements. VSL’s

    Get Price
  • Avdel® NeoBolt® Lockbolts | STANLEY® Engineered

    Lockbolts. High strength, vibration resistant, and eco-friendly, the NeoBolt ® non-breakstem lockbolt fastening system is designed for use in heavy-duty structural applications. This unique two-piece fastener design features locking grooves for strength and vibration resistance. Unlike traditional lockbolt fasteners, there is no pin break so ...

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  • X-ROCK MM - Acerbis USA

    2021-7-5 · Product Information. Cut and abrasion-resistant leather and microfiber uppers. Hinge in the ankle area. Protection of the shinbone with upper and lower anatomically-shaped shin guards. Shaped heel guard to make changing gears easier when starting. Protection of the midfoot and toe area in plastic with ribbing for improved impact absorption.

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  • Post-Tensioning System and Prestressing Steel Bars

    2020-4-20 · 2 The Williams System Williams Prestressing Post-Tensioning Systems consist of high tensile steel bars available in seven diameters from 1” (26 mm) to 3” (75 mm) with guaranteed tensile strengths to 1027 kips (4568 kN).

    Get Price
  • STABILIZATION OF WEDGE FAILURE IN ROCK SLOPE

    bolts, were cast into the concrete to facilitate later drilling of the bolt holes. All the rock bolts were 6-m (20-ft) long contin­ uous threadbar that had grout anchors. The anchor­ age length of 2.4 m (8 ft) was determined by using the assumption that the rock/grout working-bond

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  • Coal Mining | JENNMAR

    Technical Data and Dimensions for 40 lb., 60 lb., 85 lb., and 115 lb. rail sections. JENNMAR offers a complete line of steel and iron clad ties to the mining and tunneling industries. We can engineer our ties to meet your specific haulage application. Our ties can be designed for any type of rail and gauge.

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  • A Gene Expression Programming Model for Predicting

    2019-11-1 · active grouted rock-bolts in tunnel stability [17] and analysis of the interaction between the lining of a tunnel boring machine (TBM) tunnel and the ground [18]. In recent years, artificial intelligence (AI) methods have been extensively used in many fields

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  • A GUIDE TO TORQUE VALUES - Norbar

    2014-12-12 · (a) bolts and nuts are new, standard finish, uncoated and not lubricated* (b) the load will be 90% of the bolt yield strength (c) the coefficient of friction (µ) is 0.14 (d) the final tightening sequence is achieved smoothly and slowly, until the torque tool indicates full torque has been obtained.

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  • Post-Tensioning | STRUCTURAL TECHNOLOGIES

    STRUCTURAL TECHNOLOGIES is the exclusive manufacturer of VSL post-tensioning products and construction systems in the United States. VSL systems have a well-earned reputation for their quality, reliability, and durability – and have been used throughout the world since 1956 to build, repair, and strengthen buildings, tanks, transportation and special structures.

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  • AMERICAS

    The cartridge is designed for rapid insertion into a wide range of diameter and length boreholes. The system permits the placing of bolts in any position or angle above or below the horizon. Therefore, optimum bolt anchorage is possible in a wide range of concrete structures or rock strata by easily adjusting the length of the resin anchor zone.

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  • A New Rock Bolt Design Criterion and Knowlwdge

    The impact of the number of strata layers within bolting range and pretension applied to bolts upon the stability of an opening was investigated using FLAC model. Four statistical models for predicting optimum bolt supports using a minimum solid beam thickness were established, and based on these results, a design criterion was proposed.

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  • Anchoring systems for geotechnical engineering

    2017-4-19 · In mines - The bolts reinforce the roof of the cavity to recreate a beam effect with the natural earth. On cliffs - The bolts stabilise the blocks to limit erosion. They can also be used to anchor the stone and rockfall mesh. In tunnels - The bolts reinforce the natural earth on the roof to create an arched effect. Soil nails & rock bolts

    Get Price
  • Scissor Bolters | MacLean Engineering

    bolts, were cast into the concrete to facilitate later drilling of the bolt holes. All the rock bolts were 6-m (20-ft) long contin­ uous threadbar that had grout anchors. The anchor­ age length of 2.4 m (8 ft) was determined by using the assumption that the rock/grout working-bond

    Get Price
  • STABILIZATION OF WEDGE FAILURE IN ROCK SLOPE

    2020-10-27 · Hossein Masoumi, H. Roshan, M. Arashpour, Partnering Geophysical Strata Rating (GSR) and numerical modelling for optimum characterisation of rock mass in open cut coal mines to improve slope design and stability, Australian Coal Association …

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  • Dr. Hossein Masoumi - Engineering | Monash University

    2017-8-29 · 48–51 Kits, Knife Sections, Knife Clips, Rivets, Bolts SHAPES CHARTS 52–59 Knife Sections INDEX 60–61 TABLE OF CONTENTS CUTTING PARTS FOR TODAY’S DEMANDING APPLICATIONS New Holland Original Equipment Cutting Parts are designed and manufactured for the finest agricultural harvesting equipment available today. Whether for the New Holland ...

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  • GENUINE NEW HOLLAND CUTTING PARTS. - CNH

    MAHLE Original® gaskets utilizes OE equivalent or better materials in all our gaskets. Cylinder head bolt set (GS) contains contains the head bolts necessary to replace one cylinder head. Torque-to-yield bolts cannot be reused, new fasteners ensure proper sealing …

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  • More Information for MAHLE GS33285 - RockAuto

    2021-6-18 · Rock and Soil Mechanics (Monthly) is an academic journal about rock & soil mechanics and geotechnical engineering, started in 1979. It is sponsored by Wuhan Institute of Rock and Soil Mechanics, Chinese Academy of Sciences. Its ISSN is 1000-7598. Rock and Soil Mechanics is edited and published by Science Press.

    Get Price
  • Creating VSL Rock Bolts

    VSL CEME Issue October 1999 Creating Solutions Together VSL Rock Bolts - Information leaflet - Dom Nut Anchor plate Cement grout Resin Injection Expansion shell . Title: VSL …

    Get Price
  • AMERICAS

    The cartridge is designed for rapid insertion into a wide range of diameter and length boreholes. The system permits the placing of bolts in any position or angle above or below the horizon. Therefore, optimum bolt anchorage is possible in a wide range of concrete structures or rock strata by easily adjusting the length of the resin anchor zone.

    Get Price
  • DS311 ROCK SUPPORT BOLTER

    DS311 used RD314 rock drill for fast performance, installed on the Sandvik Bolting Head with low operating cost. Versatility is also one of the rock bolter’s key characteristics. Sandvik DS311 can install most common rock bolts ranging in length from 1.5 to 3 meters (5 to 10 feet). 1. SANDVIK DS311 - ROCK SUPPORT BOLTER

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  • 4140HW Alloy Steel Technical Data

    2015-7-28 · optimum heat-treat response in heavier cross-sections. You find 4140HW in a variety of bar and tubing applications in quenched and tempered conditions. Yield strengths range from 110 ksi through 140 ksi, but we can temper it to other strength levels. When compared with standard 4140 heat treated to

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  • Anchorage Types - DSI USA - dsiamerica.com

    Multiplane Anchorage MA. The two-part multiplane anchorage is primarily used for longitudinal tendons in beams and bridges. The wedge plate and the conical anchor body with usually three load transfer planes introduces the prestressing force continuously into the member with minimal front area. The separation of anchor body and wedge plate ...

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  • Dynapac - Fayat Group • FAYAT GROUP COMPANIES

    2021-7-5 · SEISMIC automatically detects the optimum compaction frequency adjusting machine settings every 0.2 seconds. Latest news. 18 Jun 2021 - Press release. Z.ERA. This is Generation Z – a line of products that is the start of a new era. Step by step, product by product, we are reducing emissions while making sure you don’t have to compromise on ...

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  • Rock and Soil Mechanics - whrsm.ac.cn

    2021-6-18 · Rock and Soil Mechanics (Monthly) is an academic journal about rock & soil mechanics and geotechnical engineering, started in 1979. It is sponsored by Wuhan Institute of Rock and Soil Mechanics, Chinese Academy of Sciences. Its ISSN is 1000-7598. Rock and Soil Mechanics is edited and published by Science Press.

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  • INSTALLATION

    2017-4-13 · the shipping bolts. y Failure to remove shipping bolts and retainers may cause severe vibration and noise, which can lead to permanent damage to the washer. The cord is secured to the back of the washer with a shipping bolt to help prevent operation with shipping bolts in place. Bolts Remove the washer from the carton base.

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  • Coefficients Of Friction - Roy Mech

    2020-10-19 · Static Coefficient of Friction. The static friction coefficient (μ) between two solid surfaces is defined as the ratio of the tangential force (F) required to produce sliding divided by the normal force between the surfaces (N) μ = F /N . For a horizontal surface the horizontal force (F) to move a solid resting on a flat surface

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