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China creates world’s first boring and blasting tunneller to rip through hard rock

  • The BBM combines multiple functions that can be adaptively used in extremely challenging geological conditions, CRSIC said
  • The machine has passed three trials and is likely to be used in hydropower projects, mining and infrastructure construction

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Chinese developers have combined numerous technologies into a single tunnelling machine that can cope with a range of complex geological environments. Credit: China Railway Science & Industry Group Corporation
Zhang Tongin Beijing
Chinese scientists have developed the world’s first boring and blasting machine (BBM), which is expected to boost efficiency in excavating extremely hard rock by more than 30 per cent.
The machine is expected to be used in water conservancy and hydropower projects, mining, and the construction of highways and railways, according to Chen Jiale, a researcher at China Railway Science & Industry Group Corporation (CRSIC).

“The development of the boring and blasting machine can solve current challenges in long and large tunnel construction, offering a new solution for such projects,” he said in an interview published on Monday by China’s Science and Technology Daily.

The BBM uses a combination of mechanical, electrical, hydraulic, sensing, mechanics and guidance technologies, allowing for the simultaneous use of traditional drilling and blasting methods, alongside the power of modern tunnel boring machines.

The machine features two cutter heads and leverages the complementary advantages of each method, improving efficiency while also being environmentally friendly.

“It effectively combines the functions of tunnel boring machines (TBMs) and traditional drilling and blasting methods, featuring multiple excavation modes,” Chen said.

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