Mining Resin Bolts

Why Choose Us?

Complete Qualifications
The company has now developed into a high-tech enterprise with complete products, excellent quality, large scale and strong production capacity in the same industry. The company has made more than 100 scientific and technological innovation achievements and obtained 28 national patents.

Grouped Equipment
The supporting equipment includes automatic production line of anchor rod, automatic shearing production line of anchor rod, pallet production line, anchor cable production line, W guard plate production line and other production and processing equipment.

Wide Range of Applications
The company's products cover dozens of kinds of mining lamps, concrete-filled steel tubular supports, production and processing equipment for support products, anchor rods, anchor cables, anchoring agents, various metal meshes, hose assemblies, steel ladders, steel belts, etc.

Professional Service
The company pays attention to after-sales service, has a perfect after-sales service system and a strong technical support team, to provide customers with all-round, efficient and timely after-sales service. The company's after-sales service scope includes product installation, commissioning, training, repair, maintenance and other links to ensure that customers can get high-quality after-sales service and support.

Definition of Mining Resin Bolts

Mining resin bolts are designed for security of roof and side walls of mine workings and tunnelling as an independent or strengthening housing bolting. They also apply to strengthen and stabilize the soil on the slopes. Mining resin bolts hollow bars, drill bits, plates, nuts, centralizers, and optionally couplers, these anchor bolts are meticulously designed to withstand substantial loads while offering ease of installation. The threaded hollow bars come in two primary variations: R thread, also known as rope thread or wave thread, and t thread, which combines curved and flat surfaces. The continuous nature of these mining resin bolts ensures enhanced structural integrity and load-bearing capacity.

High Srength Rock Bolt
High Srength Rock Bolt is an important material used to support and fix structures buried deep underground, with some significant characteristics and corresponding advantages and disadvantages.
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Threaded Rebar Rock Bolts
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Resin Bolts Underground Mining Left Right-Screwing
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Coal Mine Using Resin Bolt
Metal rod bodies of threaded steel resin anchor bolts without longitudinal ribs: MSGLW-335/16, 18, 20; MSGLW-500/18, 20, 22. Metal rod bodies of equal-strength threaded steel resin anchor rods:...
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The Resin Anchor Rod
There are significant differences between resin anchor rods and metal anchor rods in multiple aspects, mainly reflected in material characteristics, support effects, construction processes, and...
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Resin Rock Bolt
The support effect of resin anchor rods is very significant, manifested in the following aspects
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Resin Bolt
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Common Mine Anchor Cable
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High Strength Rock Bolt For Mining
High-strength anchor rods for mining are a kind of support equipment specially used in mining engineering. They can effectively enhance the supporting capacity of soil and rock mass, and ensure...
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Galvanized Anchor
The installation steps of galvanized anchor rods for mining mainly include the following key steps, which ensure the correct installation and effective support of the anchor rods:
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Benefits of Mining Resin Bolts

Suitable For All-terrain Conditions
It may be more challenging to install mining resin bolts in poor ground conditions, but it is not impossible. Cartridges can be installed to form long-lasting grouting if the borehole is stable.

Simple Installation
The bolting system allows mining resin bolts to be placed in any position or angle in the mine or tunnel ceiling. First, the cartridges are injected into the holes that have been created. Then, simply insert a bolt and rotate it to mix the components inside the cartridge to start an immediate stabilising chemical reaction.

Reliable Bonding
When the grouting resin and catalyst components combine within the hole, they form a strong mechanical interlock with the mining resin bolts and the surrounding rock. The mixture cures in minutes, forming a solid bond with the surrounding rock that can withstand heavy loads. The resin and catalyst measurements are meticulously calculated to allow for quick mixing while limiting the amount of resin that pours out of the hole.

Mining Resin Bolts: What Is the Process of Rock Bolting?

Rock bolting is the systematic reinforcment and/or anchorage of rock slopes by the insertion and grouting of steel bars into holes predrilled into the more or less fractured rock mass, improving its stability.

The deformed steel bars are typically 25 to 50 mm in diameter and up to 12 to 15 m in length. Long mining resin bolts are typically formed by joining shorter threaded bars using special couplers, to facilitate handling. For convenience of installation, strand anchors (see fact-sheet 6.8) are normally used where longer mining resin bolts are required. Mining resin bolts are installed across the discontinuities or the potential failure surfaces at a dip angle flatter than the normal and typically work mainly in tension and only subordinately in shear and bending.

Typically, drillholes in rock are self supporting. However, critical drilling conditions with potential loss of borehole stability may be encountered when drilling through higly fractured or milonitic zones, especially if water is also encountered in the drillhole. In this case, it may be simpler to grout and redrill the hole, rather than using a casing.

In relation to the degree of relaxation or loosening of the fractured rock to be reinforced and/or to be tied to the more competent rock below the mining resin bolts can be un-tensioned or tensioned.

Relaxation and or loosening of the rock mass is a process that takes place as a results of unloading and weathering; once relaxation or loosening has been allowed to take place there is a loss of interlock between the blocks of rock and a significant decrease in the shear strength along the discontinuities and in the rock mass as a whole. Once relaxation or loosening has taken place, it is not possible to reverse the process.

How Is Mining Resin Bolts Made? 3 Common Methods

Before diving into a real-world bolt manufacturing example, let's first recap the three most common methods of manufacturing mining resin bolts: Cold forming, hot forging, and machining.

Cold forming (aka cold heading) is the process of forming a bolt without heating up steel. This is done by striking or pressing the material within a form.

Hot forging is the process of heating up steel to a point where it becomes malleable, then forming it in a die.

Machining is the process of cutting away steel to fit desired bolt dimensions.

The Mining Resin Boltsmanufacturing Process

We primarily use cold forming, so we'll use a cold-formed bolt as an example. Here are the seven steps we take to manufacture it, along with pictures from throughout the production process. Keep in mind that this is a part that requires a few more steps in the production process than others due to its shape and diameter.

Cutoff
Our team takes bars of steel and cuts them to length.

Extrude
This is our first hit. We strike each piece of cut material (one at a time) within a large press to reduce the diameter on one end to the pitch diameter that is specified. That's where the threads will be formed in a future step.
The other end (with the larger diameter) is where the bolt's head will be. During this step, it gets a small increase in diameter to prepare for the next hit.

Upset
This is our second hit, where we strike the material within the press again (also one at a time). The goal here is to enlarge the bolt's head end, so it's ready for the final hit that will form it. The material doesn't typically flow well enough to form the head in just one hit.

Headed
This is our third hit, which is also done one at a time in a press. The hex, flange, undercut, and head markings are all formed during this stage.

Trimmed
This is our fourth and final hit. It's done in a trimming press, one at a time. This is when the flange is trimmed, making it straight and round.

Rolled
During this stage, we roll the bolt's threads. While some manufacturers may choose to cut threads, we stick with thread rolling at wilson-garner. Rolled threads are typically more durable, accurate, and resource-efficient. The threads are added using a reed roller, again one at a time. This is a very intensive part of the mining resin bolts manufacturing process. Once the threads are all rolled, the mining resin bolts is dimensionally done and ready for final dimensional inspection. This is when our team ensures all the dimensions are in tolerance.

Finished
We send the mining resin bolts off to a partner for heat treatment, blasting, and zinc plating. After the mining resin bolts have been heat-treated, blasted, and plated, we get them back, and they're almost finished. But before they're ready to pack and ship, we re-roll the threads one more time. This is to remove any nicks or burrs that may have been added in the heat treat or plating process, and to ensure that the threads gauge properly. From there, the mining resin bolts go through one final inspection to ensure everything is as it should be. Then it's time to pack and ship!

What Is the Most Common Material for Mining Resin Bolts?

Steel is the most common fastener material. Steel fasteners are available plain as well as with various surface treatments such as zinc plating, galvanization, and chrome plating.

Steel fasteners are commonly available in 4 grades: Grade 2, Grade 5, Grade 8, and Alloy Steel. Many other grades exist but are used far less often. Grade 2, 5, and 8 are usually plated with a slightly blue-ish or yellow zinc coating, or are galvanized, to resist corrosion.

Mining Resin Bolts: What Are the Bolts Used in Mining?

Mining resin bolts is a long anchor bolt, for stabilizing rock excavations, which may be used in tunnels or rock cuts. It transfers load from the unstable exterior to the confined (and much stronger) interior of the rock mass.

Mining resin bolts are almost always installed in a pattern, the design of which depends on the rock quality designation and the type of excavation. Mining resin bolts are an essential component of the new austrian tunneling method. As with anchor bolts, there are many proprietary rock bolt designs, with either a mechanical or epoxy means of establishing the set. There are also fiberglass bolts which can be cut through again by subsequent excavation. Many papers have been written on methods of rock bolt design.

Mining Resin Bolts Installation

For pre-tensioned mining resin bolts, insert the necessary resin cartridges into the drill hole, by placing the fast-setting cartridges in first and the slow-setting cartridges last. Do not allow cartridges to free fall to bottom of hole.

Push Mining Resin Bolts Into Hole (rotating At This Time Is Optional). When bolt is completely inserted into the hole, rotate 40-60 revolutions (approximately 10-15 seconds). Caution should be taken to avoid under-spinning or over-spinning.

Install Bearing Plate, Washer And Hex Nut. Complete pre-tensioning before slow-setting cartridges gel by using a hydraulic jack or torque wrench depending on design requirements. Installation is complete when slow-setting resin has hardened.

Gel Time. Two gel times are offered for varied conditions. The standard 2-4 minute gel time meets most requirements. However, for special conditions, where installations are difficult or full length anchored tensioned bolts are used, a 15-30 minute gel time is available. Gel times are standardized at 55-60º f. The effect of temperature on gel time is shown on the left. Temperatures below 35º f will significantly slow down set times.

Caution & Safety. This product is intended for industrial use only. Avoid contact with eyes and prolonged contact with skin. Wear safety glasses when handling or installing. If contact occurs, wash eyes or skin with water for 15 minutes. In case of eye contact, obtain medical attention. Cartridges contain benzoyl peroxide, polyester resin, styrene and inert fillers. The relationship between hole dimensions, mining resin bolts size and the size and number of cartridges is critical to good performance.

What Size Hole for Mining Resin Bolts?

Bar Diameter	Minimum Net Area Thru Threads	Recommended Hole Diameter
7/8” – 9 UNC (22 mm)	0.46 in2 (298 mm2)	1” (25 mm)
1” – 8 UNC (25 mm)	0.61 in2 (391 mm2)	1-1/8” (29 mm)
1-1/8” – 7 UNC (29 mm)	0.76 in2 (492 mm2)	1-1/4” (32 mm)
1-1/4” – 7 UNC (32 mm)	0.97 in2 (625 mm2)	1-3/8” (35 mm)

Our Factory

Founded in 1997, Jining Luoling New Mining Products Co., Ltd. is a wholly-owned state-owned mining new product enterprise, located in Zoucheng, which is known as the hometown of Confucius and Mencius and the state of etiquette. As a subsidiary of Jining Energy Development Group Co., Ltd., we have strong financial and technical strength, and are high-tech enterprises with complete products, excellent quality, large scale and strong production capacity in the same industry in China.
The company's products cover dozens of kinds of mining lamps, concrete-filled steel tubular supports, production and processing equipment for support products, anchor rods, anchor cables, anchoring agents, various metal meshes, hose assemblies, steel ladders, steel belts, etc. Our support product production and processing equipment mainly includes bolt production line, anchor cable production line, pallet production line, W guard plate production line, bolt automatic cutting production line, bolt bevel automatic shearing production line, etc., all using exquisite production technology and technical equipment, to provide customers with high-quality, reliable products and services.

Our Certificate

Production Equipment

The supporting equipment includes automatic production line of anchor rod, automatic shearing production line of anchor rod, pallet production line, anchor cable production line, W guard plate production line and other production and processing equipment.

Ultimate FAQ Guide to Mining Resin Bolts

Q: What is a mining resin bolts?

A: Mining resin bolts are used in roof bolting to ensure roof stability in mine workings of mining plants where non-ferrous metal ore is extracted. Expansion and adhesive mining bolts ensure adequate load-bearing capacity and are an indispensable piece of equipment for roof-bolting trucks. Ask for the product.

Q: How do mining resin bolts work?

A: Mining resin bolts work by 'knitting' the rock mass together before it can move enough to loosen and fail by separating piece by piece. Mining resin bolts may also be used to support wire mesh. Mining roof bolt bodies can be divided into a free section and an anchoring section.

Q: How to install mining resin bolts?

A: • Drill the hole.
• Clean the hole to remove all debris and dust.
• Inject the chemical resin using an applicator gun.
• Use electrical tape to mask the threaded stud.
• Allow to cure and set well.
• Importance of the mixing nozzle.
• What about cavities?

Q: How do you remove mining resin bolts?

A: Drill a lot of small holes in the resin surrounding the bolt, then twist and pull. Fill the old hole with glue and cover with dust from the new bolt hole.

Q: What size hole for mining resin bolts?

A: We stock a wide range of masonry drill bits – choose one that is at least 4mm wider in diameter than the resin anchor bolt or stud anchor. Before filling the hole with chemical anchor resin, make sure the drilled hole is free of dust and debris. This is to ensure the full bond strength of resin anchors is achieved.

Q: How do mining resin bolts work?

A: The resin is injected into the substrate, after which the anchor is inserted. The resin creates a strong chemical bond between the drilled anchor and the substrate. Some stud designs may use additional interlocking features to ensure that the anchor grips to the material.

Q: What is the difference between a stud bolt and mining resin bolts?

A: Mining resin bolts are commonly used in piping and flange applications where a high level of tension is required to create a leak-proof joint. On the other hand, a stud anchor is a type of expansion anchor designed to be inserted into a pre-drilled hole in concrete or masonry.

Q: How strong are mining resin bolts?

A: A 5/8" diameter threaded rod in a 3/4" diameter hole embedded to a 5-5/8" depth and cured at 75 °F for 24 hours in 3,500 psi concrete will yield an ultimate pullout strength of 28,000 lbf (124 kN). At the minimum load time of 4 hours in the same conditions the ultimate pullout strength is 7,000 lbf (31 kN).

Q: How strong are mining resin bolts?

A: Types of chemical anchors. Polyester Resin (PL): This resin is especially indicated for application in solid brick, semi-hollow brick, hollow blocks and hollow concrete blocks. In addition, it withstands masonry loads up to 595 kg and concrete loads up to 4.600 kg.

Q: Is mining resin bolts waterproof?

A: The resin cures quickly at low temperatures to give you a vibration-proof, waterproof bond. It's even strong enough to set studs for anchoring machinery. The resin stays as it is in the tube, so you can continue working over a couple of days.

Q: Are mining resin bolts strong?

A: Chemical anchors (I prefer the simpler term 'resin anchors') exert no setting stresses in the base material so can be specified at closer edge and spacing distances in concrete and will usually develop the strongest anchorage in masonry materials – which are their main 'Pros'.

Q: How do you install mining resin bolts?

A: • For pre-tensioned bolts, insert the necessary resin cartridges into the drill hole, by placing the fast-setting cartridges in first and the slow-setting cartridges last.
• Push bolt into hole (rotating at this time is optional).
• Install bearing plate, washer and hex nut.
• Gel time.
• Caution & safety.

Q: What are the different types of anchor mining resin bolts?

A: One end is embedded into the concrete, while the opposite end is threaded to attach structural support. There are four main types of anchor bolts: L-shaped, double end rods with plate, headed, and swedge. Each type has their own uses, sizes, and advantages. Let's go over each type of anchor bolt and how they are used in structural applications each day.

Q: What do you mean by mining resin bolts?

A: Mining resin boltsis the systematic reinforcment and/or anchorage of rock slopes by the insertion and grouting of steel bars into holes predrilled into the more or less fractured rock mass, improving its stability. The deformed steel bars are typically 25 to 50 mm in diameter and up to 12 to 15 m in length. Long bolts are typically formed by joining shorter threaded bars using special couplers, to facilitate handling.

Q: What are the advantages of mining resin bolts?

A: Common uses:
• Improve the stability and load bearing characteristics of a rock mass.
• Civil engineering industry – used for fixing rock netting and cliff/slope stabilisation.
• Rock bolts can be used for structural repairs to retain walls, bridge walls and tunnels.

Q: What types of structures is mining resin bolts commonly used for?

A: • Slopes and rock faces.
• Retaining walls.
• Dams and embankments.
• Bridges and highways.
• Excavation and mining support.

Q: What is the procedure of mining resin bolts?

A: Air/ water through a 25mm rigid pvc / steel pipe lowered up to bottom of the hole. Cement & resin capsule in ration 1:1 shall be pushed into the hole to the end. A 25mm dia. Rock bolt threaded at the top shall be inserted into the hole manually/ drilling rig.

Q: What are all of the situations that mining resin bolts are commonly used for?

A: Self-drilling anchor rock bolt is mainly used for tunnel and underground engineering, slope engineering, ground and foundation engineering. It can be used for pre-construction support and can effectively enhance the stability of soil and rock mass.

Q: How do mining resin bolts stabilize a slope?

A: Mining resin bolts are considered a type of active reinforcement due to the post-tensioning they provide, and are used to add compressive stress to joints within a rock mass. This force increases the friction along the fracture planes and helps to reduce block movement.

Q: What are the failure of mining resin bolts?

A: There are three types of rockbolt failure mechanisms: the axial failure where bolts fail due to significant axial load; the shear failure where bolts yield due to large shear load; the combined axial and shear failure due to both axial and shear load.

We're professional mining resin bolts manufacturers in China, specialized in providing high quality customized service. We warmly welcome you to wholesale bulk mining resin bolts in stock here from our factory. For price consultation, contact us.

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