Trenching and Excavation
Trenching and Excavation
Jul 1, 2021
osha.gov
The long wall excavation method in mining is a highly efficient technique primarily used in coal mining, involving the full extraction of large rectangular coal blocks in a continuous operation. Using a long wall face, typically 100 to 300 meters long, hydraulic roof supports, or shields, hold up the mine roof while a shearer or plow cuts the coal. The coal is transported to the surface via a conveyor belt. As the shearer advances, the supports move forward, allowing controlled roof collapse, kn
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The long wall excavation method in mining is a highly efficient techniq…
1.1K viewsJul 11, 2024
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Excavation of a tunnel with hydraulic hammer installed on an excavator is shown in this video. This method can be used in unstable ground condition where drill and blast can't be used. Ground support should be immediately applied as the excavation progress. We invite you to register in our Online Tunnel Engineering course. Click the link below to find out more and complete your registration. https://tunnel.engineering/register/tunnel-engineering-course/ Video credit: LinkedIn Hassan Ammari Hassa
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Excavation of a tunnel with hydraulic hammer installed on an …
26.9K viewsApr 27, 2024
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In the drill and blast method of tunnelling, the process begins with strategically drilling holes into the rock at specific intervals along the tunnel alignment. These holes serve as blast points for explosives. In tunnelling, blasting typically starts from center points and radiates outward. The central blast creates a void, breaking up the core of the material and forming a cavity. The drill and blast method remains a widely employed technique in tunnel construction due to its adaptability to
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In the drill and blast method of tunnelling, the process begins wit…
9K viewsJan 4, 2024
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