Take a look at the detailed rock-breaking principles of the Lanhi multi-functional roadheader!

   I. Core Rock-Breaking Method: High-Frequency Impact + Mechanical Wedging

   The Lanhi multi-functional roadheader utilizes non-explosive rock-breaking technology at its core, achieving efficient rock-breaking through the following combination of methods:

   1. High-Frequency Hammer Impact Rock-Breaking

   ① Equipped with the H5/H8/H10/H12 series high-frequency breakers, these hammers deliver thousands of high-frequency impacts per minute, generating stress waves within the rock, causing micro-cracks and progressively fragmenting the rock.

   ② Applicable Rock Formations: Suitable for medium-strength rock formations with a hardness of ≤40 MPa (such as sandstone and shale). The impact energy can penetrate deep into the rock mass.

  2. Bucket Teeth/Drill Rod Wedging Crack Expansion

   In addition to impact rock-breaking, bucket teeth or drill rods are wedged into the surrounding rock cracks, expanding the cracks through mechanical leverage and accelerating rock fragmentation.

   3. Gravity-Driven Rock Breaking

   Utilizing the natural free surface at the base of the surrounding rock, crushed rock fragments automatically fall off under the action of gravity, reducing the energy consumption of secondary crushing.

   Advantages: Compared to traditional blasting, this method reduces rock disturbance by over 70%, effectively controls over-excavation and under-excavation (≤ 20 cm), and reduces the risk of landslides.

   II. Assisted Rock Breaking Technology Enhances Efficiency

   To improve adaptability to complex rock formations, Lanhi utilizes a synergistic combination of technologies:

  1. Diesel-Electric Dual Drive

   The electric mode provides stable, high-frequency impact force, while the diesel mode ensures flexibility in relocation and ensures continuous rock breaking.

  2. Intelligent Spray Dust Suppression

   During rock breaking, an automatic spray system is activated to suppress dust dispersion (measured dust reduction of over 70%), improving the working environment.

   The Lanhi multi-functional tunnel boring machine's rock breaking principle is based on high-frequency impact, supplemented by mechanical wedging and gravity rock breaking. This multi-technology integration enables safe, efficient, and low-disturbance non-explosive excavation, making it a key technological enabler for innovation in tunnel engineering. For specific construction cases, please refer to its official video.