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  • JENNMAR

    Product Catalog. From bolts and beams, to channels and trusses, to resin and rebar, JENNMAR is proud to manufacture products that make Coal & Hard Rock Mining, Tunneling and Civil Construction safer and more efficient. View Full Product Catalog.

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  • Rock Bolts Hawkeye Bolt - Jennmar Australia

    2021-3-3 · Installed height is 39mm from rock surface • Significant overall operational cost savings possible • Debonded version available • Nut designed to fit J-Tech bolt and its range of fittings shredders and paddles • Full pre-tension achieved which clamps damaged rock mass together on …

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  • M3 Expandable Rock Bolt | JENNMAR

    M3 bolts tie and join fractures because they can withstand high loads and have excellent elastic properties, allowing the bolt to remain intact after rock movement without cutting. It is a versatile bolting solution for variable ground conditions.

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  • HARD ROCK CATALOGUE - Jennmar

    2021-3-3 · www.jennmar.com.au 3 Anthony Dodds . National Manager – Hardrock. E-mail: [email protected] Mobile: 0427 488 442. Anthony Bennett . Hardrock Engineer. E-mail: [email protected] Mobile: 0427 415 057. Steve Pisarskis . WA Mine Service Representative. E-mail: [email protected] Mobile: 0429 362 363. Mark Gratzer . WA Mine Service Supervisor

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  • | JENNMAR

    JENNMAR is capable of providing powder coated, epoxy coated and galvanized products. The J-LOK resin in the cartridge is used to anchor bolts to the surrounding strata. This unification of the resin, bolt and strata layers provides the necessary strength and rigidity to prevent sag by acting as a reinforcement which anchors the individual ...

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  • INSTAL Bolt Anchor System | JENNMAR

    The Fully-Grouted INSTAL Bolt combines the benefits of fully-grouted and tensioned bolts, providing the best of both worlds. The fully-grouted, high-tension bolt is a 7/8', 6 ft. special grade 75 rebar that is tensioned to nearly 20,000 lb via a mechanical shell before the fully grouted resin column cures.

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  • Jennmar

    2021-4-1 · About JENNMAR; Affiliates; Products. Coal; Hardrock; Civil & Tunnelling; Systems; News & Events; Product Videos; Technical Publications. Technical Papers; Technical Brochures; Contact

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  • Systems » Jennmar

    Complete Drilling Solutions and Falcon Drilling, LLC., are proud to announce a merger of their assets to form “The Premier - Top Hole Solutions” based drilling company for the Appalachia and Mid-West gas fields. The combined company will operate under the current Falcon Drilling umbrella and be run by Dan Donahue who will continue as President.

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  • Drilling | JENNMAR

    2016-3-31 · products. Today, JENNMAR makes a broad range of reliable products, from bolts and beams, to channels and trusses, to resin and rebar. We’re proud to make products that make the industries we serve safer and more efficient. 5 100% Proudly Made in …

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  • HARD ROCK CATALOGUE - Jennmar

    2021-3-3 · • Significant overall operational cost savings possible • Debonded version available • Nut designed to fit J-Tech bolt and its range of fittings shredders and paddles • Full pre-tension achieved which clamps damaged rock mass together on walls and gradeline • Reduces fibrecrete requirements to cover exposed bolts on gradeline

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  • JennmarJining Mine Roof Support Products Co.,Ltd

    Rocbolt Technologies China Ltd. is a 100% foreign owned enterprise consisting of JM 50% and DSI 50% .The JV is excited to serve the mining and tunneling industries by providing quality products and services.Our main products include rock bolts, cable bolts, cable trusses, friction lok, plates, resin products, and bolting accessories.

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  • Development and evaluation of corrosion resistant

    2018-1-1 · To provide the mining industry a cost-effective, expandable rock bolt and combat the corrosion issues, Jennmar Corporation, Inc., and its subsidiary Keystone Mining Services, LLC (KMS), analyzed corroded bolt samples and ground condition, identified root causes, evaluated properties of various coating materials, and developed a new rock bolt ...

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  • Jenmar Python Swellex Bolts, Self Drilling Anchor, SDA

    2011-12-13 · PyTHON Rock Bolt. Among the products Jennmar offers for rock support challenges in the construction and mining industries is the PyTHON rock bolt range, which features friction bolts that support roofs. Their high load-bearing capacity and elongation properties ensure safer working conditions and faster excavation cycles at low cost, the ...

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  • Jennmar - Construction Today

    2020-10-13 · www.jennmar.com • (412) 963-9071 Global Headquarters 258 Kappa drive Pittsburgh, Pa 15238 www.jennmar.com • (412) 963-9071 SELECTED GrounD ConTroL ProDuCTS Coal and Hard Rock Mining • Tunneling • Civil Construction ü Thorough InspecTIon ü experT AnAlysIs ü effecTIve, MshA-Approved plAn ü QuAlITy MAnufAcTurIng from Bolts and Beams to ...

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  • SELECTED GrounD ConTroL ProDuCTS

    2010-6-27 · Rock burst is one of the greatest challenges to ground control in the mining industry. There are more and more industry requirements on yielding rock support. Since 2008, Jennmar has been conducting large scale research and development works to develop a technically reliable and cost effective yielding rock bolt.

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  • Development of a New Yielding Rock Bolt - Yield-Lok

    Rock bolts are required to be high strength, typically over 30 tonnes ultimate tensile strength. Rock bolts are typically bonded to the borehole walls by resin. It is advantageous for the surface of the rock bolt to be deformed in order to provide high bond strength between the bolt/resin/rock interfaces.

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  • Self Drilling Rock Bolt - JENNMAR CORPORATION

    Rock bolts are widely used for consolidating the rock strata. In conventional strata support systems, a bore is drilled into the rock by a drill rod, which is then removed and a rock bolt is then installed in the drilled hole and secured in place typically using a resin or cement based grout.

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  • BREAKABLE ROCK BOLT - JENNMAR CORPORATION

    2021-1-14 · Jennmar Corp. at 258 KAPPA DRIVE PITTSBURGH PA 15238 US. Find their customers, contact information, and details on 144 shipments. See Jennmar Corp. 's products and suppliers 成千上万家像您这样的公司使用磐聚网搜索

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  • ACCC releases SoI on proposed acquisition of

    2016-4-21 · Rock bolts are rods which are inserted into the rock to hold it together. DSI and Jennmar supply rock bolts for use in soft rock mines (coal mines) and hard rock mines (such as gold, copper, zinc and diamonds). They also supply ancillary products including resins and cementitious grout (which can be used to anchor bolts in the rock) and mesh ...

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  • New Tools for Back Support | E & MJ

    2020-4-8 · Squeeze, ground movement and highly variable rock quality caused some mines to accelerate their rehab schedule in areas supported with inflatable bolts.” The use of the Jennmar MPA and the J-LOK P pumpable resin system, often referred to as the Nevada Bolt, has greatly reduced the cost and downtime associated with rehabbing areas that have ...

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  • Jennmar to make own resin - MiningMonthly.com

    2006-4-6 · Jennmar to make own resin. LEADING bolt manufacturer, Pittsburgh-based Jennmar, has announced plans to make its own resin for the US market. From early April the company will manufacture its own resin under the brand name J-LOK, an affiliate company of Jennmar. “This is something we’ve been thinking about doing for a long time, and with all ...

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  • Jennmar Company Profile on AECinfo.com

    Jennmar Company Profile in AECinfo.com, your source of North American building product and supplier information, including brochures, specs and CAD details, since 1995.

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  • Development and evaluation of corrosion resistant

    To provide mining industry a cost-effective inflatable bolt and combat the corrosion issues, Jennmar Corporation, Inc., and its subsidiary Keystone Mining Services, LLC (KMS), analyzed corroded bolt samples, identified root causes, evaluated properties of various coating materials, and developed a new inflatable rock bolt, Python M3™, that is ...

    Get Price
  • Tensionable cable bolt - Jennmar Corporation

    Typically, the resin is set after two to three minutes. Cable bolts have heretofore been primarily used as secondary roof support structures with tensionable rock bolts serving as the primary anchorage mechanism. Tensionable cable bolts are the subject of U.S. Pat. No. 5,378,087 to Locotos and U.S. Pat. No. 5,525,013 to Seegmiller et al.

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  • US20120070234A1 - Rock Bolt - Google Patents

    Rock bolts for supporting structures e.g. roofs of passageways in mines are well known. There are many different types of rock bolts. A rock bolt generally consists of an elongate shank (length will generally depend upon the material which the rock bolt is intended to secure) having a distal end (the end which in use is fixed furthest within the rock), or “head end”, and a proximal end ...

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  • Roof Bolting Tools | Coal Age

    2016-7-19 · Rock bolts are used for support in a variety of engineering applications. This test provides a quantitative measure of the performance of a rock bolt or its anchor. 4.2 Tension.-At least 5 percent of the installed rock bolts or their anchors should be tested to verify if the rock bolts or their anchors have the specified tension. 5.

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  • Determining Rock Bolt or Anchor Tension Using a Torque

    1997-5-27 · I claim: 1. A mine roof bolt comprising a rebar formed into an elongated body having a substantially uniform cross section, a first end for entering a bore hole in a rock strata of a mine, and a second end opposite the first end for engagement with a bolting machine to permit installation of the roof bolt within the rock strata, the rebar having 0.44-0.52 wt. % C, 1.1-1.6 wt. % Mn, 0.15-0.35 ...

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  • Jennmar - The Tunnelling Journal

    Our primary product roster includes M3® expandable rock bolts, FRICTION-LOK® stabilizer systems, Fast Anchors™ DCP Bolts, steel sets, steel tunnel ribs & shaft rings, lattice girders, rail ties, resins and with our alliance partners, Contech, we also provide 2-flange liner plate. Contact Details. Jennmar 258 Kappa Drive Pittsburgh PA 15238

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  • New Tools for Back Support | E & MJ

    2020-4-8 · Squeeze, ground movement and highly variable rock quality caused some mines to accelerate their rehab schedule in areas supported with inflatable bolts.” The use of the Jennmar MPA and the J-LOK P pumpable resin system, often referred to as the Nevada Bolt, has greatly reduced the cost and downtime associated with rehabbing areas that have ...

    Get Price
  • Development and evaluation of corrosion resistant

    To provide mining industry a cost-effective inflatable bolt and combat the corrosion issues, Jennmar Corporation, Inc., and its subsidiary Keystone Mining Services, LLC (KMS), analyzed corroded bolt samples, identified root causes, evaluated properties of various coating materials, and developed a new inflatable rock bolt, Python M3™, that is ...

    Get Price
  • Jennmar to make own resin - MiningMonthly.com

    2006-4-6 · Jennmar to make own resin. LEADING bolt manufacturer, Pittsburgh-based Jennmar, has announced plans to make its own resin for the US market. From early April the company will manufacture its own resin under the brand name J-LOK, an affiliate company of Jennmar. “This is something we’ve been thinking about doing for a long time, and with all ...

    Get Price
  • Tensionable cable bolt - Jennmar Corporation

    Typically, the resin is set after two to three minutes. Cable bolts have heretofore been primarily used as secondary roof support structures with tensionable rock bolts serving as the primary anchorage mechanism. Tensionable cable bolts are the subject of U.S. Pat. No. 5,378,087 to Locotos and U.S. Pat. No. 5,525,013 to Seegmiller et al.

    Get Price
  • DYWIDAG Rock Bolts - DSI EMEA

    Expansion Shell Anchors Rock Bolts with Expansion Shell. Extremely fast and easy installation. Immediate load bearing capacity in the borehole. Galvanized version available. Retensionable. Various angle compensation designs available.

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  • Roof Bolting Tools | Coal Age

    The invention claimed is: 1. A mine roof bolt comprising: an elongated rod having a first rod end and a second rod end and comprising a resin control surface located on said rod at a position between said first and second rod ends, said resin control surface having a first surface end and a second surface end, the surface defining a channel extending between said first and second surface ends.

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  • Mine roof bolt with resin control surface - Jennmar ...

    1997-5-27 · I claim: 1. A mine roof bolt comprising a rebar formed into an elongated body having a substantially uniform cross section, a first end for entering a bore hole in a rock strata of a mine, and a second end opposite the first end for engagement with a bolting machine to permit installation of the roof bolt within the rock strata, the rebar having 0.44-0.52 wt. % C, 1.1-1.6 wt. % Mn, 0.15-0.35 ...

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  • Rock Bolt - Self Drilling Anchor Latest Price ...

    The closeness of competition between DSI and Jennmar in the supply of soft rock bolts. The likelihood that an alternative supplier would be able to commence supply of soft rock bolts in a sufficiently timely manner and on sufficient scale to constrain DSI following the acquisition, taking into account any barriers to commencing such supply.

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  • Statement of Issues

    Three bolts of the prior art (Insta'l 2 bolts available from Jennmar Corporation) were tested for comparison. The resin used for bonding all bolts was H2 resin with one minute gel time. The mine roof bolts of the present invention were installed with resin 1¼ inch diameter×14 inch long cartridges and the prior art bolts were installed with ...

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  • Point anchor coated mine roof bolt - Jennmar

    General Info JJennmar of Virginia has been serving the coal mining industry since its incorporation in 1965. The company began operations with the purchase of the manufacturing machinery to produce steel roof bolts in Cresson, Pa. Jennmar offers advanced line of roof control products to coal and hard rock …

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  • Jennmar 470 Wardell Industrial Park Rd, Cedar Bluff,

    Mining rock bolts Products. As a leading global manufacturer of crushing, grinding and mining equipments, we offer advanced, reasonable solutions for any size-reduction requirements including, Mining rock bolts, quarry, aggregate, and different kinds of minerals.

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  • Mining rock bolts

    Jennmar Corporation, USA. ... low cost, and other outstanding features such as durability, corrosion protection, shear ... such as bolt pull te sting and over -coring. To overcome these difficulties, installation of rock bolts with a pumpable resin system became necessary. In last a few years, various pumpable resin systems have

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  • Polyester resin injection of dynamic resin and cable ...

    2020-4-6 · Self-drilling Hollow Bolts, Grouts Offer Savings. JENNMAR reported its injectable bolting systems and grout offerings are field-proven, safe, efficient and cost effective. “They are a problem-solving suite of tools that can be tailored to mine-specific applications,” said Benjamin Mirabile, vice president, JENNMAR Engineering.

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  • Smarter Bolters May Help Level the Field | Coal Age

    HOW ROCK BOLTS ARE MADE. Most solid rock bolts are manufactured by producing a deformed bar in a hot rolling mill. These deformed bars have deformations or ribs which run around the circumference of the bar, and they provide an interlock and load transfer mechanism with the resin or grout used to anchor the bolts in a borehole.

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