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W for coal mine
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Steel guard plates are used for support in mine roadways to resist surrounding rock deformation and falling rock impacts, ensuring safety in underground operations. Common specifications include a thickness of 3-6mm, a length of 0.4-0.6m, and a width of 220-280mm. The material is mostly Q235 or Q345 steel, with a yield strength of 345MPa or higher. They are fixed with anchor rods to effectively disperse pressure and enhance roadway stability.
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