The mining drilling jumbo (also known as the rock drilling jumbo) is a key piece of equipment used in underground mining and tunnel projects that employ the drill-and-blast construction method. By integrating modules such as the rock drilling machine, propulsion system, and locomotion mechanism, it achieves high-efficiency drilling operations. Its technological advancements and engineering applications have significantly improved excavation efficiency and safety, making it one of the hallmark pieces of equipment in modern mechanized mining.
I. Core Structure and Operating Principle
1、Basic Components
Rock Drilling Machine: The core power component—for example, the French Montab HC series hydraulic rock drilling machine—is characterized by its high impact force and low drill bit wear.
Drilling Arm and Thrust System: The hydraulic planar drilling arm allows for precise positioning, while the thrust beam, made from heavy-duty aluminum alloy, combines lightweight properties with excellent bending resistance.
Locomotion Mechanism: A tire-based chassis is suitable for narrow roadways (e.g., a 5×4 meter cross-section), whereas a tracked chassis is appropriate for slopes of up to 28°.
Control System: Intelligent features such as automatic anti-jamming of the drill bits and electromagnetic pump oil shortage protection help reduce failure rates.
2、Operation Process
The hydraulic-driven rock drilling machine repeatedly strikes the rock, with the propulsion system enabling continuous drilling. A single bore can be advanced at a rate of 0.8–2.5 meters per minute. Under typical conditions, drilling a section with a 3-meter advance and over 30 holes requires only about 2 hours.
II. Main Classifications and Application Scenarios
1、By Function
Excavation Car: Used for drilling blast holes in roadways and tunnels. For instance, the Lanhai CYTJ45 model is suitable for a 3×6 meter section.
Mining Car: Equipped with a deep-hole drill rod storage system that enables drilling of holes between 20 and 54 meters deep, suitable for mining methods based on bottomless pillar collapse.
Anchor Bolt Car: Combines drilling with support functions to enhance roadway stability.
2、Typical Engineering Cases
Metal Mines: In Xinjiang Qianxin Mining’s lead-zinc mine, the mining drilling jumbo achieved a single-cycle advance of 3 meters and improved efficiency by 30%.
Transportation Tunnels: In projects such as the Xuefeng Mountain Tunnel on the Yunnan Huichiao Expressway and the West Chongqing High-Speed Railway project, a full-process dual-arm car was used to complete excavations in complex rock strata.
As a core piece of equipment for modern mining, the mining drilling jumbo is redefining the operational paradigm of underground construction through innovations in intelligence, efficiency, and environmental friendliness. By integrating hydraulic drive, automated control, and precision positioning technologies, this equipment has transformed operations from manual rock drilling to mechanical drill-and-blast, becoming a critical support for safe and efficient mining production.