Roof bolting is one of the key processes ensuring safety in underground mining. It involves the mechanical reinforcement of the roof and sidewalls of an excavation through the installation of steel rock bolts that connect weaker layers of the rock mass with more stable strata. This process is carried out using specialised bolting machines, referred to as bolting machines / roof bolters.
Roof bolting is an active method of supporting underground excavations and is currently a standard solution used in mines worldwide. Unlike older passive methods, such as timber props or temporary supports, roof bolting does not rely solely on propping the rock, but on reinforcing the structure of the rock mass as a whole.
By installing rock bolts:
Conditions in underground excavations change as mining operations progress. As mining depth increases, stresses in the rock mass grow, the structure of the rock changes, and the roof and sidewalls are subjected to constant loads.
Lack of proper roof bolting may lead to a gradual loss of excavation stability, detachment of rock fragments, and in extreme cases to rock falls posing a threat to miners' lives. Roof bolting therefore acts as a preventive measure aimed at eliminating hazards before they occur.
A well-designed and properly executed roof bolting system:
The roof bolting process carried out using a roof bolter machine is a sequence of repeatable and precise operations. It begins with proper positioning of the machine in the excavation, followed by drilling a hole in the roof or sidewall. In the next step, a rock bolt, mechanical or resin-grouted, is installed and, once anchored, transfers loads to more stable layers of the rock mass.
The entire process must be:
For this reason, bolting machines are designed to allow flexible configuration of operating parameters and safe operation by the operator.
A roof bolter is a self-propelled mining machine designed for drilling holes and installing roof and sidewall rock bolts in underground excavations. It is a specialised piece of equipment that combines drilling, bolt handling and proper anchoring in the rock mass.
Machines of this type are designed to operate in confined spaces, under difficult environmental conditions, while maintaining high standards of operator safety.
Typical features of bolting machines include:
Bolting machines can be classified according to several key criteria. The table below presents the most common classifications together with examples of Mine Master solutions.
| Criterion | Type | Mine Master machine examples | Characteristics |
|---|---|---|---|
| Drive | Diesel | Roof Master 1.7K, Roof Master 1.8 AWK | Proven solutions for a wide range of applications |
| Drive | Electric (battery-powered) | Roof Master 1.8 KE | No exhaust emissions, lower noise level, for specific operating conditions |
| Operating conditions | Low-profile excavations | RLP 1410 | Compact design for confined spaces |
| Operating conditions | Standard excavations | Roof Master 1.8 AWK | Universal application |
| Operating conditions | Explosion-hazard zones | Roof Master 1.8 AWK ATEX | Compliance with ATEX requirements |
| Working configuration | Various drilling and bolting systems | Roof Master 2.320 AWK, 2.310 | Adaptation to mine-specific requirements |
Mine Master designs bolting machines based on many years of experience working with mines around the world. The portfolio includes both compact machines for low-profile excavations and solutions for more demanding operating conditions.
A compact bolting machine designed for operation in low-profile excavations. Its design enables safe and efficient work in confined spaces while maintaining high stability and bolting precision.
A universal bolting machine used in underground mines with varied geological conditions. Its proven design and flexible configuration options make it a popular solution in many mining operations.
A classic diesel-powered roof bolter designed for standard excavations. It combines high productivity with reliability in demanding operating conditions.
A version adapted for operation in explosion-hazard zones. It meets ATEX certification requirements while maintaining the functionality and ergonomics of the base version.
A battery-electric roof bolter designed to improve working conditions in underground excavations. Zero exhaust emissions and reduced noise levels make it a solution for mines focused on modern technologies.
Machines designed for larger excavation cross-sections and more demanding applications, offering a wide range of working equipment configurations.
Mine Master machines operate in mines all over the world. Each configuration is selected individually, taking into account geological, organisational and safety conditions. The portfolio includes both standard solutions and machines serving as a base for further customisation, enabling precise adaptation of equipment to the needs of a specific mine.
It is a method of supporting the roof and sidewalls of an excavation by installing steel rock bolts in the rock mass.
A roof bolter is a mining machine used for drilling holes and installing roof bolts in underground mines.
No. Machines are selected individually based on the geological and organisational conditions of a given mine.
Selection should take into account excavation height, geological conditions, safety requirements and the operating system. Most often this is done in cooperation with the manufacturer.
Yes. Mine Master designs and modifies machines based on specific mine requirements, offering both standard and dedicated solutions.
Mine Master Spółka z o.o.
Wilków, 59-500 Złotoryja
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tel: +48 (76) 87 83 511
info@minemaster.eu
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PKD: 2892Z
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