What are the benefits of digging tunnels with drum cutters?

Writer： admin Time：2022-10-30 23:19:56 Browse：262℃

Drum Cutters are the combination of a milling head and an excavator - a small TBM, a TBM or a shield machine is required for large tunnel excavations, and the Drum Cutter is used for tunneling in rocks of medium to low hardness with the following advantages over the sliding blast method.

1. The drum cutter has a durable metal drill plate load-bearing structure and polished blades, which can excavate medium-hard, medium-hard or below rocks in large areas.

2. Mechanical excavation reduces the disturbance to the surrounding rocks, and avoids the reduction of rock strength, loosening of rock structures and partial cracking of rock structures due to explosion vibration.

3. It is beneficial to protect the original self-supporting capacity of the rock mass, and is not easy to cause large-area deformation and local shedding.

4. The adaptability is relatively strong, and cross-sections of any shape and size can be dug out: the width of the metal cutting head of the milling excavator can be changed with different rocks, and the milling excavator does not need to remove it from the excavation table. It can be adjusted 360 degrees.

5. Constructing a milling machine instead of an explosion avoids the reduction of rock strength due to the vibration of the explosion, and the rock mass is unfavorable such as structural looseness and local explosion. Protect the original self-stress of the rock to avoid the reduction of rock strength and cause large-scale collapse.

6. Instead of machines such as tunnel excavation table and shield table, the construction cost is greatly reduced, and the hardness of rock is reduced; for weathered rock, rock and metal with high hardness but layered structure have a large amount of cutting The amount of rock excavated reaches 80-120 tons per hour (according to rock hardness).

7. The compact drum cutter can replace different picks, grooved metal cutting wheels, rocks, etc. according to the working environment.