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Há 2 dias · The sand-mud interbedded surrounding rock contains discontinuities, such as horizontal bedding, joints, weak planes and weak interlayers. Drilling and blasting construction in this kind of ...
15 de mai. de 2024 · The results show that multi-long-hole blasting with empty holes mainly causes compressive damage of rock mass around boreholes, reflected tensile damage near empty holes and ground surface, bending-induced tensile damage between empty holes and boreholes, shear damage along the side tangents and bottom of empty holes and boreholes ...
22 de mai. de 2024 · Highlights. This study proposes a fractal damage calculation method that understands the blasting damage laws at the macroscopic, mesoscopic, and microscopic scales of rock. The box dimension is a straightforward macroscopic evaluation method for assessing 3D macroscopic fractures.
23 de mai. de 2024 · Atlantech Senior Mining Engineer David Shirley is extremely familiar with the real-world implications between drilling and blasting operations at mine sites and the impacts on the community and environment. As David explains, it is a close and intertwined relationship where all aspects must be carefully managed to minimise the impact ...
22 de mai. de 2024 · Innovation. World’s 1st: China’s boring-blasting machine claims 30% efficient tunneling. The machine effectively combines the functions of tunnel boring machines (TBMs) and traditional...
8 de mai. de 2024 · The proposed method can be used in the rockbolt design of tunnels constructed using the drilling and blasting method. Tunnelling using drilling and blasting method inevitably disturbs the surrounding rock and induces a blasting damaged zone around the tunnel.
22 de mai. de 2024 · Apply now. A boring and blasting machine could be more versatile when dealing with mixed and complex ground conditions. The tests showed that the efficiency of tunnelling through hard igneous and metamorphic rock can be increased by 30% when explosives are used to split the strata before they meet the TBM’s blades.
