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Expansion shell bolts are easy to handle, while they are implemented fast. In the case of expanding anchors the anchor foot is braced against the borehole wall with wedge-shaped spreading elements. Resins or mortars are not required to secure the anchor. They are also used for the attachment of various components of mining equipment.
Upon insertion of the expansion anchor into the borehole, the plastic ring holding the wedges at their minimum diameter is scraped at the borehole edge. Immediately after this, the liberated wedges assume the geometry of the borehole under the spring effect. Any return movement is now excluded and each load transferred from the anchor rod to the expanding head causes further spreading of the wedges.
We provide you with solutions for both active and passive methods of rock support wherever you are.
Our products range from various steel and Glass Fibre Reinforced Polymer (GFRP) bolts to steel arches, meshes and shotcretes.
Our offering can help you with:
- Roof and ground control
- Slope stabilisation
- Rock fall
- Permanent and temporary rock bolting
- Spiling
- Converging/yielding areas
Bolts alone may not be enough.
Many applications require additional components to ensure the desired results.
We provide steel and GFRP accessories that work in combination with our products for you to achieve the best outcomes. From drill bits, couplings, meshes to plates and nuts and trusses. Our portfolio works to provide you with the right solutions wherever you are.
Our know-how is the result of over 40 years of experience in the production and global supply.
The system features a hollow bar, which is used as a drill string for drilling either with water flush, air flush or cement grout flush.
All system components are rigorously tested according to stringent factory standards and ISO 9001 to ensure that the specifications are met. The sacrificial drill bit significantly enhances the productivity of the installation process. In order to improve performance and cost-effectiveness, project data are being collected from around the world.
Continuous optimisation of our drill bits is a primary concern to further improve the penetration rate and bit quality while at the same time reducing manufacturing costs. For improved corrosion resistance, Self Drilling Anchor components are either hot dip galvanised or fitted with a TwinCoat coating (hot-dip galvanisation with an additional dual epoxy coating).
GFRP products are suitable for temporary and permanent solutions and with their low-weight, their are ideal for decreasing risks associated with manual handling.
Our partnership with FiReP® allows us to provide you with the flexibility that you need, wherever you are.
FiReP® Group is one of the world’s largest producer of Fibre Reinforced Polymer (FRP) pultruded bars with unique profiles and thread functions for application in the mining, construction and energy sectors.
The Group has two plants in Shanghai (China) and Velenje (Slovenia), certified according to ISO9001 and ISO14001.
With subsidiaries in the 6 countries Switzerland, Germany, China, Slovenia, Canada and Japan the group offers worldwide presence and service on site.
Minova has partnered with FiReP in 2009 to bring new products and technical expertise to our portfolio.
Since then, we have been working jointly to provide our mining, energy and construction customers with an enhanced portfolio of support products and services.
Cable Bolts incorporate much higher strength than traditional bolts with incomparable flexibility to adjust to the movement of the earth’s strata.
Split Friction Pipe Bolts
Split Friction Pipe Bolts are designed for roof and ribs support in mine working areas as an independent or secondary bolting roof support system.They are also used for the attachment of various components of mining equipment.
Expandable Friction Pipe Bolts
Rock surrounding underground excavations must be reinforced and stabilised in order to provide a stable and safe working environment. The Expandable Rock Bolt is a full column anchored rock bolt that forms a mechanical interlock between the entire bolt and the borehole wall.
Depending on the design the following types of bolts can be distinguished:
- M1 wedge bolt applied at pretension of up to 60 kN
- W1 wedge adhesive bolt at pretension of up to 100 kN
- W2 cylindrical adhesive bolt at pretension of up to 80kN
Application conditions – according to BN-78/0436-03 standard - "Bolts"
Our steel accessories support mining, construction and energy sectors providing additional operations support.
The idea for designing these arches was created thanks to cooperation with the mining industry and is a response to the requirements of a rectangular coal mine to obtain a large width of the excavation.
Square Arches V-25 Section Shape
Square arches consist of elements made of V-25 section shape joined by “overlapping” SD25 or SDO25 clamps.
Square Arches V-29 Section Shape
Square arches consist of elements made of V-29 section shape joined by “overlapping” SD29 or SDO29 clamps.