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Coal Mining

Ground Support products for the coal mining industry. We offer customized and reliable products. Along with our complimentary products, we are a single source provider for all your coal mining needs.

Bendable Bolts

JENNMAR's Bendable Bolts are available where bending is necessary to permit installation of bars that are longer than the mine opening height.

Bolthead Markings and Codes

JENNMAR, Bolt Head Markings, Recommended BOLT Torque, Cable Bolts Color Code, Threaded Bolts Color Code

Cable Products

JENNMAR offers a complete line of cable support products. These products are based on 7-strand, high-strength cable. JENNMAR offers an industry-leading line of cable products including: non-tensioned cables, post-tensioned cables, tensionable cables for primary roof support, and fully-grouted cables.

Cable Reels

Cable Tensioning Unit (CTU)

A Cable Tensioning Unit (CTU) is portable device that will pre-stress various size cables.

CABLE-LOK Shell

The CABLE-LOK Shell is a spring-loaded shell that can be automatically set on installation.

CBJ-1 Cable Bolt Tensioning Unit (CTU)

For Installation of Bearing Plates

Combination Bolt

JENNMAR offers the industry's most proven combination bolt system in the mining industry by providing ultimate tension in weak strata.

Conventional Mechanical Bolts

All systems are configured with high strength bar: • (Grade 55 (55,000 psi minimum yield) • (Grade 75 (75,000 psi minimum yield)

Cuttable and Corrosion Resistant Products

JENNMAR offers a cuttable high strength molded fiberglass rib pan and plates for environments requiring corrosion resistance.

Fast Anchor 3 Bolt System

The Fast Anchor 3 is a double corrosion resistant steel bolt for strata control that provides quick assembly and secure installation due to its expansion shell that provides immediate anchorage and generates superior grip upon application.

FRICTION-LOK Stabilizer System

The JENNMAR FRICTION-LOK Stabilizer System is a strata control system designed to firmly control hard or soft rock. As lateral ground movement increases, the system increases its superior holding power.

Galvanized Coated Products

JENNMAR is capable of providing powder coated, epoxy coated and galvanized products.

Headed Rebar Bolts

INSTAL Bolt Anchor System

The Fully-Grouted INSTAL Bolt is the ideal high tension bolt due to the resin that locks bolt tension within the system, while significantly slowing down the weathering process around the bolt hole.

JENN-TENSION

JENNMAR offers the JENN-TENSION roof bolt re-tensioning system for a quick and economical alternative to replacement of loose roof plates.

J-LOK Resin

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 stratified layers of rock into a single high strength beam.

JM All Thread Bar

JM CABLE Fully Grouted Cable Bolt

The JM CABLE Fully Grouted Cable Bolt is proven to be a very versatile roof support due to its ability to control many different ground conditions, from increasing the lifespan of standard cable bolt supports in long-term main entry systems to stopping the ingress of water.

JM CABLE INSTAL CC Tensionable Cable Bolt

The INSTAL CC Cable Bolt cable bolt is part of the INSTAL family of tensionable cable bolts and is the only tensionable system approved by MSHA as primary support.

JM CABLE Post-Tensioned Cable Bolt

Post-Tensioned Cable Bolt (PT) is manufactured using 0.6 or 0.7" cable and incorporates resin mixing bulbs and a stiffener tube.

JM CABLE Silicone Injected Cable Bolt

The JM CABLE Silicone Injected Cable Bolt allows use of longer cable bolts without concerns about water from drilling into aquifers in the above strata.

JM CABLE SUMO Cable Bolts

M3 Custom Protective Coating

Applying coatings to our products isolates and actively protects the product making them resistant to corrosive environments.

M3 Expandable Rock Bolt

M3 expandable rock bolts offer superior quality that responds to the most demanding roof support applications. Its high load capacity and excellent elongation properties ensure safer working conditions and faster excavation cycles.

M3 Pump

MPA Bolt System

Fast, single-step anchoring system using standard equipment. Efficient installation since drilling and grouting can be performed in a single operation, saving both time and money.

Pourable Resin Grout

Once cured, the Pourable Resin Grout forms an effective corrosion barrier from a pH of 2 through a pH of 11.

Pumpable J-LOK P

J-Lok P has been formulated for anchoring and sealing rock bolts in mining and tunneling applications.

Self Drilling Hollow Bar

The Self-Drilling bolt is a fully threaded hollow bar that initially serves as a drill rod, utilizing a lost bit. The thread is made to comply to ISO 10208. For use in unconsolidated ground or other difficult ground conditions.

Self-Drilling FRICTION-LOK

JENNMAR has developed the Self-Drilling FRICTION-LOK, a new design where the borehole is drilled and the friction bolt is installed simultaneously.

Tensioned Rebar Bolts/TT Anti-Friction Washer

JENNMAR's tensioned rebar bolts have threaded ends and can be used as fully grouted or point anchored systems.

Truss Systems

JENNMAR offers the mining and tunneling industries the most reliable, high strength truss systems available.

YIELD-LOK Bolt

YIELD-LOK Bolt is a new generation of yielding rock bolt that provides reliable ground control in both seismic and convergence ground conditions. It is fully grouted with resin or cement in application and provides immediate primary support on installation.

2 Flange Liner Plate

JENNMAR Civil now offers Contech 2-Flange Liner Plate that provides optimum shaft stability and protection when constructing new utility tunnels, relining structures under highways and railroads, and lining vertical shafts.

Beams

Belt and Utility Hangers

JENNMAR offers a complete line of belt hangers to be used for hanging belt structures within the mine. The following table shows some typical belt hanger assemblies that are available and used throughout the mining industry. If you require a specific or customized assembly, our experienced team of engineers can design

Channels and Roof Mats

Impact Resistant Lagging

Lattice Girders and Steel Arches

Plates

JENNMAR plate products feature high strength, light weight and a low profile, effectively distributing roof bolt load evenly in all directions. Manufactured under rigid quality - control conditions in accordance with ASTM F432, plate ratings range from 20,000 to 60,000 lbs. Customized sizes and coatings are available.

Steel Rib Supports

Curvatures range from a minimum radius of 10 times the beam depth for 4" and 6" sections to 14 times the depth of section for larger beams. JENNMAR Specialty Products also fabricates straight beams, forepoling sheets, steel lagging, tie rods, foot plates and pipe spacers.

Steel Sets and Tunnel/Shaft Rings

JENNMAR Specialty Products, in conjunction with our sister affiliate engineering company, Keystone Mining Services (KMS®) can custom design arch and square set support systems as well as tunnel and shaft rings.

TH Arch System

The TH Arch system has quickly gained wide market acceptance by uniting high resistance to load along with dynamic behavior that is unseen in other arches in the industry.

Umbrella Tubes

JENNMAR's Umbrella Tube Concentric Drilling System is a pre-support system for use in tunnels, tunnel portals and slopes. The system is comprised of a concentric drilling tube where installation occurs simultaneously with drilling.

Longwall Replacement Parts

Super Hurricane

The Super Hurricane can clean as far as 1,500 feet through ten 90 degree elbows, inside or outside corners, even irregular surfaces such as weld beads without stopping. The Super Hurricane Rotating Pipe Cleaning System process is completely environmentally friendly.

Rail and Accessories

Rail Ties

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.

Rail Turnouts and Turnout Components

Jennmar can supply turnouts, rails and accessories for 40 lb., 60 lb and 85 lb. light rail trackwork in any gauge.

J-CRIB Pumpable Crib

J-CRIB Pumpable Crib is a specialized pumpable cement and containment bag that replaces conventional timber cribs in longwall tailgates and bleeder headings.

J-Latch Timber Crib

J-Latch is designed to replace conventional timber cribs (4- and 9-point). Timbers are interlocked and there is 100% contact which greatly improves strength and stability, and also allows for higher aspect ratios.

J-PAK Crib

J-PAK Cribs are a standing support product that utilizes a custom made steel shell filled with a specialized cement. J-PAK is designed to slowly yield under rock load.

Props

JENNMAR's array of props are easy to transport and install. They provide reliable support and help maintain the integrity of the mine roof. JENNMAR manufactures a full range of prop configurations with a variety of pre-load and yield options to meet your mine's specific requirements.

1-Day J-SEAL

1-Day J-SEAL differs from traditional J-SEAL as the non-foamed formulation provides for extended pumping distances along with the quick strength gain required for an approved seal in less than 24 hours.

EcoVent Equipment Door

The EcoVent Equipment Door addresses an industry challenged with tighter operating constraints, reduced budgets, and increased pressure to improve mine safety.

JENNCHEM Underground Roadway Repair

JENNCHEM Underground Roadway Repair is a specially formulated fast-setting concrete designed for the mining and tunneling industries.

JENNMAR Overcast Systems

JENNMAR Overcast Systems are designed to be modular reusable structures that are used in underground high pressure situations to insure intake air is not contaminated with return air.

J-SEAL Foam

J-SEAL is a specialized foaming cement that is used to build permanent coal mine ventilation seals. The rapid strength gain provides immediate ground support to the surrounding strata with quicker cure times to meet seal approval specifications in days rather than weeks.

Metal Stoppings

JENNMAR's Metal Stoppings are an economical solution for underground mine ventilation control. This alternative to conventional block stoppings is comprised of a set of vertically telescoping steel panels that provide a safe, low-cost system to deliver positive control in all mining environments.

Grouts & Resins Usage

PUR70 is pumped (bottom up) into Fully- Grouted Cable Bolts (FGCB) to provide corrosion protection and improve bolt life. J-SEAL is a high strength foaming grout used primarily for rated seals.

J-FIRM Soil Stabilization Grout

Jennchem's J-Firm Soil Stabilization Grout is a free flowing, low viscosity, sodium silicate grout and hardener that fully encapsulates and hardens loose soil in order to allow for safe excavation.

J-PLUG Acrylate Grout

J-PLUG Acrylate Grout is a fast reacting, low viscosity, acrylate polymer that is used to seal water leaks in concrete structures and stabilize soils.

JSC Grout

JSC Grout is JENNCHEM's series of single-component hydrophobic polyurethane grouts that are used for sealing leaking cracks or joints in a variety of applications.

PUR70 Polyurethane Resin

PUR70 Polyurethane Resin is a two-component polyurethane resin system. When properly mixed at a ratio of one to one, PUR70 cures to a rigid polymer with unique physical properties, resistance to water and chemical attack, and long term durability.

TDS-240 Urea Silicate Resin System

This grout is designed to secure rock and cable bolts in tunnel and mine applications. It quickly develops a thixotropic characteristic that minimizes free flow but allows continuous, as well as interrupted, pumping overhead.

US Foam and Grout

The two-component resin is delivered by a pump unit and injected in a ratio of 1:1 by volume through a mixing gun. The resulting medium sets to produce an elastic, expanding mass with outstanding adhesive and compressive strength.

Product Catalog

Products for the Coal & Hard Rock Mining, Tunneling, and Civil Construction Industries.