Split set mining systems are a type of rock reinforcement method used in underground mining operations to support excavations and prevent rockfalls or collapses.
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Split set mining systems are commonly used in underground mining operations where ground conditions are poor or unstable. They are particularly effective in areas where traditional support methods, such as timber or steel sets, may be impractical or insufficient. Split sets and friction bolts can be installed quickly and easily, making them a popular choice for temporary or permanent rock reinforcement.
Split sets are typically steel tubes that are longitudinally split along their length. They are installed by inserting them into predrilled holes in the rock. As they are inserted, the split portion of the tube expands, exerting pressure against the rock walls. This pressure helps to support the surrounding rock mass and prevent it from collapsing.
Friction bolts, also known as friction rock bolts or expansion shell bolts, are another component of split set mining systems. These bolts consist of a steel rod with an expandable shell at one end. Similar to split sets, friction bolts are installed by inserting them into predrilled holes in the rock. Once in place, the shell is expanded, creating friction between the bolt and the surrounding rock, which helps to provide additional support.
Tanrimine Metal Support Co.,Ltd (TRM) is a professional manufacturer for Friction Bolt Split Set and Plate, as well as a full range of its accessories and relative components.
Our state-of-the-art rollformers and welders contribute to an impressive annual production capacity of over 30,000 tons for both friction bolts and split sets, and this capacity is continually expanding.
Additionally, our self-owned galvanized production line ensures that our friction bolts and split sets boast a superb coating of galvanizing, enhancing their durability and corrosion resistance.
Equipped with a comprehensive range of presses, CNC bending, laser cutting, and other cutting-edge facilities, we are adept at meeting customer requirements with swift responsiveness and short delivery times.
Furthermore, our product offerings extend beyond friction bolts and split sets to include related items such as plates, mesh, support rings, pull collars, and more.
Our commitment to customer satisfaction is underscored by the availability of OEM services, allowing us to tailor solutions to meet unique specifications and preferences.
Mpumatech Mining &#; Split Sets + Washers
Mpumatech, has in a recent drive to expand our product range and after exploring all industry needs for rolled products, have decided to focus on the manufacture of split sets / friction anchors for underground mining and civil engineering projects. Mpumatech have now developed their own split set friction anchor which we manufacture alongside our main product ranges at our facility, conveniently located in Witbank, close to major transport links and hubs in Johannesburg.
The Product
Split sets / friction anchors have been used as a primary roof support in the underground mining environment for many years. The anchor consists of an open seamed high tensile Supraform S420 steel tube with a face plate. One end is tapered for easy insertion into a pre-drilled hole. It is installed by driving the assembly into a marginally smaller hole than the split sets diameter and the welded steel ring then provides the necessary support to hold the washer plate in place. The set then uses friction to anchor itself along the whole length of the bolt by relying on the radial spring force generated through compression of the tube. Split set technology is used worldwide by many mines for an extensive variety of mining applications.
Key Advantages of using Split Sets
Fast and easy installation
Full length support
Effective support at any angle
Cost effective
Axial and radial support
No torqueing or re-torqueing
No special equipment is required
Improved rock stability
Changing Ground Conditions
If you want to learn more, please visit our website TRM.
Pull testing on the split set friction anchors proves their superiority in anchoring themselves inside the drilled hole. Once the product has been installed, the spring loading allows the anchor to adapt to minor changes in the ground conditions. This is an important advantage over inelastic bolts that are unable to adapt to changing ground conditions.
Easy Installation
The split set is a popular choice due to its easy installation. Once the hole is drilled, the driver tool drives the anchor into the wall. Installation time is typically less than a minute and there is no waiting time for grout to set, no tightening or torqueing and no ongoing maintenance is needed after installation. This saves time, labour and additional grouting or resin expenses.
Sizes Available
Split set friction anchors are available in 33mm, 39mm, 41mm and 46mm diameters in a variety of lengths to suit the application of the mine. Depending on the strength and corrosion requirements, we offer S420MC Supraform as well as 3CR12 stainless steel. The domed bearing washer plates are available in 125 x 125 x 4mm and 150mm x 150mm x 4mm as well as the Combi Plate 300mm x 270mm x 1.6mm.
Custom specifications are available for large orders.
Packaging
Mpumatech wraps and straps all products in high quality packaging with metal straps designed to withstand the rigours of transport by road and sea. This ensures damage is eliminated or kept to an absolute minimum during transport.
Pull Testing
The pull test is a common method to determine the effectiveness of the split sets. From each batch Mpumatech tests a split set in our in-house laboratory to ensure that the product conforms to the required load.
The first part of the curve signifies the elastic deformation of the steel, the set-up of the test apparatus and the split set. The initial slip load, which is the load at which the split set firsts moves in its hole, is considered to be the split set&#;s pull-out strength.
The scale of the slip load depends on an array of factors, including the contact area between the Split Set and the rock, the size of the drill hole into which the bolt is installed, properties and type of the rock, the time passed between split set installation, the pull test and the quality of installation.
he pull test should not be regarded as a conclusive measure of the split sets capacity but rather as an index test and one that can give an idea of the expected performance of the split set.
Both in-house and an independent laboratory tensile test are conducted on Mpumatech manufactured split sets to confirm the product conforms to the published specification and to offer complete transparency to the client. Mpumatech clients can rely upon the standard, consistency and quality of our split set units as supported by these ongoing tests.
Introduction to 3CR12 Stainless Steel Split Sets / Friction Anchors
We have now partnered with Columbus Stainless Steel in South Africa, who are the producers of 3CR12 stainless steel, to manufacture split sets for highly corrosive environments.
A key concern of split sets relates to their useful life span in an underground environment. They are vulnerable to corrosion and can become ineffective after a short period of time, with this in mind we now offer 3CR12 Stainless Steel split sets.
Our 3CR12 Stainless Steel split sets, with similar high tensile properties, is available at a similar price point to the galvanised split sets. Where absolute peace of mind is required, the 3CR12 split set will meet even the most demanding safety standards.
We have conducted salt spray tests to compare the performance between galvanised and stainless steel split sets and the results show the advantage of using 3CR12 material, please click on the following link for the test report:
Salt Spray Test Report
We believe that this is a great alternative solution to galvanised material and could limit the potential for falls of ground where galvanised material fails over time.
Key Advantages of 3CR12 Stainless Steel Split Sets
Superior corrosion resistance
Recommended for areas high in acid and salinity
Galvanised material scratches off when inserting into the hole compromising the steel to the corrosive elements, stainless steel can scratch and remain effective
Cost effective compared to galvanised split sets
Can outlast galvanised split sets where they fail over time
To view our online split set brochure, please click on the following link:
Split Set / Friction Anchor Brochure
For any enquiries for our manufactured split sets / friction anchors please send us an to or complete the form below
Split set mining systems are a type of rock reinforcement method used in underground mining operations to support excavations and prevent rockfalls or collapses.
Split set mining systems are commonly used in underground mining operations where ground conditions are poor or unstable. They are particularly effective in areas where traditional support methods, such as timber or steel sets, may be impractical or insufficient. Split sets and friction bolts can be installed quickly and easily, making them a popular choice for temporary or permanent rock reinforcement.
Split sets are typically steel tubes that are longitudinally split along their length. They are installed by inserting them into predrilled holes in the rock. As they are inserted, the split portion of the tube expands, exerting pressure against the rock walls. This pressure helps to support the surrounding rock mass and prevent it from collapsing.
Friction bolts, also known as friction rock bolts or expansion shell bolts, are another component of split set mining systems. These bolts consist of a steel rod with an expandable shell at one end. Similar to split sets, friction bolts are installed by inserting them into predrilled holes in the rock. Once in place, the shell is expanded, creating friction between the bolt and the surrounding rock, which helps to provide additional support.
Tanrimine Metal Support Co.,Ltd (TRM) is a professional manufacturer for Friction Bolt Split Set and Plate, as well as a full range of its accessories and relative components.
Our state-of-the-art rollformers and welders contribute to an impressive annual production capacity of over 30,000 tons for both friction bolts and split sets, and this capacity is continually expanding.
Additionally, our self-owned galvanized production line ensures that our friction bolts and split sets boast a superb coating of galvanizing, enhancing their durability and corrosion resistance.
Equipped with a comprehensive range of presses, CNC bending, laser cutting, and other cutting-edge facilities, we are adept at meeting customer requirements with swift responsiveness and short delivery times.
Furthermore, our product offerings extend beyond friction bolts and split sets to include related items such as plates, mesh, support rings, pull collars, and more.
Our commitment to customer satisfaction is underscored by the availability of OEM services, allowing us to tailor solutions to meet unique specifications and preferences.
Mpumatech Mining &#; Split Sets + Washers
Mpumatech, has in a recent drive to expand our product range and after exploring all industry needs for rolled products, have decided to focus on the manufacture of split sets / friction anchors for underground mining and civil engineering projects. Mpumatech have now developed their own split set friction anchor which we manufacture alongside our main product ranges at our facility, conveniently located in Witbank, close to major transport links and hubs in Johannesburg.
The Product
Split sets / friction anchors have been used as a primary roof support in the underground mining environment for many years. The anchor consists of an open seamed high tensile Supraform S420 steel tube with a face plate. One end is tapered for easy insertion into a pre-drilled hole. It is installed by driving the assembly into a marginally smaller hole than the split sets diameter and the welded steel ring then provides the necessary support to hold the washer plate in place. The set then uses friction to anchor itself along the whole length of the bolt by relying on the radial spring force generated through compression of the tube. Split set technology is used worldwide by many mines for an extensive variety of mining applications.
Key Advantages of using Split Sets
Fast and easy installation
Full length support
Effective support at any angle
Cost effective
Axial and radial support
No torqueing or re-torqueing
No special equipment is required
Improved rock stability
Changing Ground Conditions
Pull testing on the split set friction anchors proves their superiority in anchoring themselves inside the drilled hole. Once the product has been installed, the spring loading allows the anchor to adapt to minor changes in the ground conditions. This is an important advantage over inelastic bolts that are unable to adapt to changing ground conditions.
Easy Installation
The split set is a popular choice due to its easy installation. Once the hole is drilled, the driver tool drives the anchor into the wall. Installation time is typically less than a minute and there is no waiting time for grout to set, no tightening or torqueing and no ongoing maintenance is needed after installation. This saves time, labour and additional grouting or resin expenses.
Sizes Available
Split set friction anchors are available in 33mm, 39mm, 41mm and 46mm diameters in a variety of lengths to suit the application of the mine. Depending on the strength and corrosion requirements, we offer S420MC Supraform as well as 3CR12 stainless steel. The domed bearing washer plates are available in 125 x 125 x 4mm and 150mm x 150mm x 4mm as well as the Combi Plate 300mm x 270mm x 1.6mm.
Custom specifications are available for large orders.
Packaging
Mpumatech wraps and straps all products in high quality packaging with metal straps designed to withstand the rigours of transport by road and sea. This ensures damage is eliminated or kept to an absolute minimum during transport.
Pull Testing
The pull test is a common method to determine the effectiveness of the split sets. From each batch Mpumatech tests a split set in our in-house laboratory to ensure that the product conforms to the required load.
The first part of the curve signifies the elastic deformation of the steel, the set-up of the test apparatus and the split set. The initial slip load, which is the load at which the split set firsts moves in its hole, is considered to be the split set&#;s pull-out strength.
The scale of the slip load depends on an array of factors, including the contact area between the Split Set and the rock, the size of the drill hole into which the bolt is installed, properties and type of the rock, the time passed between split set installation, the pull test and the quality of installation.
he pull test should not be regarded as a conclusive measure of the split sets capacity but rather as an index test and one that can give an idea of the expected performance of the split set.
Both in-house and an independent laboratory tensile test are conducted on Mpumatech manufactured split sets to confirm the product conforms to the published specification and to offer complete transparency to the client. Mpumatech clients can rely upon the standard, consistency and quality of our split set units as supported by these ongoing tests.
Introduction to 3CR12 Stainless Steel Split Sets / Friction Anchors
We have now partnered with Columbus Stainless Steel in South Africa, who are the producers of 3CR12 stainless steel, to manufacture split sets for highly corrosive environments.
A key concern of split sets relates to their useful life span in an underground environment. They are vulnerable to corrosion and can become ineffective after a short period of time, with this in mind we now offer 3CR12 Stainless Steel split sets.
Our 3CR12 Stainless Steel split sets, with similar high tensile properties, is available at a similar price point to the galvanised split sets. Where absolute peace of mind is required, the 3CR12 split set will meet even the most demanding safety standards.
We have conducted salt spray tests to compare the performance between galvanised and stainless steel split sets and the results show the advantage of using 3CR12 material, please click on the following link for the test report:
Salt Spray Test Report
We believe that this is a great alternative solution to galvanised material and could limit the potential for falls of ground where galvanised material fails over time.
Key Advantages of 3CR12 Stainless Steel Split Sets
Superior corrosion resistance
Recommended for areas high in acid and salinity
Galvanised material scratches off when inserting into the hole compromising the steel to the corrosive elements, stainless steel can scratch and remain effective
Cost effective compared to galvanised split sets
Can outlast galvanised split sets where they fail over time
To view our online split set brochure, please click on the following link:
Split Set / Friction Anchor Brochure
For any enquiries for our manufactured split sets / friction anchors please send us an to or complete the form below