Polypropylene fiber is a type of material used in underground mining and tunnels to reinforce support and improve the stability of excavations. Polypropylene fiber is composed of synthetic polymers, such as polypropylene or polyethylene, and is presented in the form of long, thin fibers.

Polypropylene fiber is used as additional reinforcement in combination with other materials, such as concrete, shotcrete, and anchor bolts, to improve the strength and durability of underground structures and excavations.

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In mining and tunnels, polypropylene fiber is used as a reinforcement material to improve the stability and safety of underground excavations. Some of the applications of polypropilene fiber in mining and tunnels are as follows:

Ground reinforcement

Polypropylene fiber is used as a reinforcement material to complement other methods of support, such as anchor bolts and shotcrete. Polypropylene fiber can be incorporated into the shotcrete mixture or injected into the ground to improve the strength and stability of the excavation.


Polypropylene fiber is used to reinforce the ground and prevent rock collapse in underground excavations. It can be placed on the walls and ceilings of the excavation to provide greater resistance.

Fall protection against rock

Polypropylene fiber is used to manufacture safety nets and meshes to prevent rock and debris from falling in underground excavations. The nets and meshes are installed on the walls and ceilings of the excavation to trap any loose material and prevent it from falling onto workers.

Slope stabilization

Polypropylene fiber is used to stabilize slopes and prevent slides in underground excavations. Synthetic fibers can be injected into the surface of the slope to improve resistance and prevent erosion.


Different presentations: 4Kg boxes and Big-Bag.

Minimum recommended dosage: 4-5kg/dm3.

Common shipments in 20′ container: Presentation in 4kg bags of paper;, 4 bags per carton; 36 boxes per pallet. Making 576kg per pallet.

In this 20′ container we load 10 pallets making a total of 5760kg.


There are several advantages of using polypropylene fiber in underground mining or tunneling, including:


Polypropylene fiber has very high strength compared to other materials used in underground mining, such as steel or concrete. Polypropylene fiber can withstand large loads and tensions without deforming or breaking.


Polypropylene fiber is much lighter than steel or concrete, making it easier to handle and transport in hard-to-reach places.


Polypropylene fiber is more flexible than steel or concrete, making it more adaptable to changes in the shape of tunnels or the structure of underground mines.

Resistance to corrosion

Polypropylene fiber does not rust or corrode like steel, making it ideal for use in humid or corrosive environments.

Increased durability

Polypropylene fiber has a longer lifespan than steel or concrete, meaning it can better resist fatigue and wear, which in turn reduces maintenance and repair costs.



In underground mining and tunnels, polypropylene fiber can be installed through an injection process into concrete or shotcrete. Injection involves introducing the metal fiber into the support material through an injection machine that mixes the fiber with the material.


In construction, polypropylene fiber can be installed through a projection process, in which a projection machine is used to incorporate the fiber into fresh concrete. The fiber is mixed with the concrete and projected onto the surface to create a sturdy structure.

Manual Mixing

In some applications, polypropylene fiber can be manually mixed with the support material, such as concrete, before installation.