Major breakthrough! The Five-new double-boom rock drilling jumper is a powerful tool for large-scale operation in tunnel step method

In recent years, the mechanized construction of tunnels has effectively promoted the technological progress of the new tunneling method. However, at present, there are still some drawbacks in the operation of rock drilling jumbos, such as the difficulty in process conversion under different geological conditions and the poor adaptability of the step method in weak surrounding rock construction. The advantages of rock drilling jumbos, such as one-time drilling and large advance, cannot be fully exerted.

▲ General construction problems of the step method with rock drilling jumbos

In order to solve the problem of mechanized operation in step construction, Wuxin Tunnel Equipment launched the first self-developed double-boom rock drilling rig in China in June 2021. It has the advantages of a wide working range, wide adaptability to construction methods, high construction efficiency, and effective control of over-excavation and under-excavation. It is another major breakthrough in the field of tunnel mechanized construction. Wuxin Tunnel Equipment, a powerful tool for large machine operations in the tunnel step method, Wuxin double-boom rock drilling jumper, you deserve to have it!

Main technical features

All-round: It is the first of its kind in China to adopt a articulated boom structure, which is suitable for step construction. Especially for two-step and three-step construction, it can meet the requirements of upper, middle and lower step operations.

High efficiency: It has a large working range. Once positioned, it can complete the construction of the entire section of high-speed rail or expressway without moving the vehicle.

Flexible: The articulated boom structure effectively prevents the boom from colliding with the steps. The entire vehicle is relatively short in length, highly maneuverable and flexible, making it convenient to pass through trestles and other facilities.

Intelligence: Remote control operation, simple and easy to learn, can be quickly mastered, closely observe the drilling situation, and effectively control over-digging and under-digging.

The structure and construction introduction of the articulated boom rock drill trolley mainly consists of the chassis system, hydraulic system, electrical system, water supply system, gas supply system, remote control operation system, cab, drill arm, thrust beam, hydraulic rock drill, etc.

Construction process

(1) Move the machine to the working position and lift the front and rear outriggers.

(2) Connect water and electricity;

(3) According to the drilling plan, operate the remote control to move the boom to the appropriate position and carry out the drilling operation on the middle and upper steps. The operators can adjust the drilling status at any time by operating the remote control to improve the drilling accuracy.

(4) After the drilling of the middle and upper steps is completed, move the machine to an appropriate position and carry out the drilling operation of the middle and lower steps. Completely solve the problem that traditional rock drilling jumbos cannot work down steps.

(5) After the drilling operation is completed, use the remote control to operate the boom to the retracted position.

(6) Switch to the chassis operation, retracts the outriggers, and move the machine to the parking space.

Construction case

The Wuxin tunnel articulated boom rock drilling rig has completely solved the problem of poor adaptability in step construction, enhancing the adaptability of the rock drilling rig to different surrounding rock grades and construction methods, and meeting all construction methods such as two-step, three-step, and full-section construction. The manual scaffolding method for weak surrounding rock construction has been completely abolished, avoiding the replacement of mechanical equipment due to the change of construction methods and improving the operation efficiency and construction quality.