In cases where the tunnel interior is sandstone, sedimentary rock and siltstone, tunneling with a drum cutter is a better option. Excavating tunnels with drum cutters can avoid unsafe and pollution caused by blasting.

If there is a hard face inside the tunnel, it can be cut with a Yichen rock saw. First use a rock saw to cut the face of the face into a grid, and then use a breaker to beat it, which can easily achieve excavation .

At the same time, Yichen also produces crusher buckets and screening buckets, which can crush the rock dug out in the tunnel construction on the spot to make it into aggregate with smaller particles. These aggregates can be used for landfill and cover soil for reuse.

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