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Tunneling Machine-Mounted Rock Bolt Drilling Rig and Supporting Technology—Heijinggang Broadcast
In the field of coal mining, roadway excavation and support are critical steps that ensure safe production and efficient extraction. Particularly under complex geological conditions—such as coal roadways, semi-coal/rock roadways, and rock roadways—traditional excavation and support methods face numerous challenges, including the imbalance between excavation and bolting, low roadway-forming efficiency, and poor safety standards. However, the emergence of machine-mounted anchor drilling rigs integrated with tunneling machines, along with their complementary support technologies, has provided innovative solutions to these longstanding issues, making them a focal point of significant attention within the industry.
Applicable Scope: The "All-Rounder" for Complex Geological Conditions
The tunneling and support operations in complex geological conditions—such as coal roadways, semi-coal-rock roadways, and rock roadways—are all within the scope of this technology. Whether it's a coal roadway with loose, easily collapsed coal seams, or semi-coal-rock and rock roadways featuring varying rock hardness, the machine-mounted anchor drilling rig integrated with the tunneling machine, along with its complementary support technologies, can effectively leverage their unique advantages to ensure the smooth progress of both tunneling and roadway support work.
Basic principle: Integrated innovation, breaking through traditional limitations
This technology has achieved a significant breakthrough by deeply advancing key areas such as integrated excavation, support, and anchoring systems, reliability of the walking mechanism, advanced integrated hydraulic systems, drill rig-mounted platforms and positioning, and onboard temporary support systems. At its core, the innovation lies in the highly integrated design of hydraulic anchor drilling rigs, temporary support devices, and cantilevered roadheaders—resulting in the development of an excavating-and-anchoring machine specifically tailored for complex geological conditions. This groundbreaking integration breaks away from the conventional separation of excavation and support operations, enabling fully mechanized execution of both tunneling and roadway stabilization. Compared to previous methods, this approach boosts excavation efficiency by more than 30%, effectively addressing longstanding challenges in longwall mining, such as the imbalance between excavation and anchoring, low roadway formation rates, and poor safety standards. As a result, it significantly enhances the overall efficiency and safety of coal extraction operations.
Process Technology and Equipment: Six Core Technologies Underpinning Efficient Operations
Roadheader-mounted bolting drill machine
As one of the core pieces of equipment in the entire technological system, the machine-mounted anchor drilling rig seamlessly integrates with the tunneling machine. It enables rapid deployment of anchor support operations simultaneously with the tunneling process, significantly reducing the time required for equipment switching and personnel reassignment—and thereby greatly enhancing support efficiency. Moreover, the machine’s precise positioning and high-performance drilling capabilities ensure the quality and stability of the anchor support, providing a reliable safeguard for the safety of the roadway.
Walking System Reliability Technology
Under complex geological conditions, the tunneling machine's movement faces numerous challenges, such as sinking into soft ground and being obstructed by protruding rocks. Reliability technology for the walking system enhances the stability and adaptability of the machine's locomotion by optimizing design and incorporating high-strength materials. Whether navigating uneven tunnels or traversing areas with frequently changing geological conditions, the tunneling machine can move smoothly and reliably, providing a solid foundation for the seamless execution of the entire excavation and support operation.
Key Technologies of Integrated Hydraulic Systems
The integrated hydraulic system serves as the power core that enables the seamless integration of excavation, support, and anchoring operations. This technology provides unified hydraulic control over the excavator's digging actions, the anchor drilling rig's drilling and support activities, and the lifting and lowering movements of the temporary support mechanism. Through meticulously designed hydraulic pipelines and highly efficient hydraulic component configurations, the system ensures smooth coordination and precise execution among these tasks, effectively preventing inefficiencies and frequent failures caused by mismatches in the hydraulic system.
Scalable Fan-Shaped Loading Mechanism Development Technology
The scalable fan-shaped loading mechanism can flexibly adjust its loading range and angle according to the size of the roadway cross-section and the distribution of rock debris. During the excavation process, it efficiently and swiftly loads fragmented rock onto transport equipment, significantly boosting rock-handling efficiency while minimizing rock accumulation within the roadway—thus creating ideal conditions for subsequent support operations. Meanwhile, the telescopic design also facilitates easy passage and maneuvering of the equipment through narrow tunnels, enhancing its overall versatility.
Drilling Rig Mounting and Positioning Technology
The rig's mounting and positioning technology ensures that the hydraulic anchor drilling machine can be securely installed on the tunneling machine, enabling precise localization. Through a specially designed mounting platform and highly accurate positioning devices, the anchor drilling machine can reliably reach the designated locations for drilling and anchor installation, regardless of varying roadway cross-sections or support requirements. This advanced precision not only enhances the efficiency of support operations but also guarantees consistent quality and reliability in the overall reinforcement process.
Airborne Temporary Support Technology
During tunnel excavation, timely and effective temporary support is crucial for ensuring the safety of construction workers and preventing tunnel collapses. Onboard temporary support technology integrates the temporary support system directly with the tunneling machine, allowing the support device to rapidly deploy as the machine advances, thereby providing immediate reinforcement to the newly excavated tunnel space. This system can flexibly adjust the support strength and coverage based on the specific conditions of the tunnel, buying valuable time for subsequent permanent support operations while significantly reducing safety risks during construction.
Promising Prospects: Ushering in a New Era of Tunnel Excavation and Support
The onboard bolter drill and associated support technology for roadheaders, with their remarkable advantages, demonstrate a promising outlook for widespread adoption. This innovative system not only enables mechanized operations for tunnel excavation and support in complex geological conditions—such as coal roadways, semi-coal-rock roadways, and rock roadways—but also integrates full mechanization across tunneling, support installation, and transportation processes. As a result, it significantly enhances the automation level and productivity of coal mining. With the coal industry placing ever-increasing emphasis on safe production and efficient extraction, this cutting-edge technology is poised to gain extensive application in more coal mining enterprises, injecting fresh momentum into the sustainable development of the coal sector and ushering in a new era of advanced roadway excavation and support systems.
