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What is the hardness classification of coal?
Release time:
2022-11-03
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What is the hardness classification of coal?
- What is the hardness classification of coal?
hardness of coal seamAccording to hardness, coal seams are divided into extremely hard coal seam 5.0>f>4.0, hard coal seam 4.0>f>3.0, medium hard coal seam 3.0>f>1.5, soft coal seam 1.5>f>0.8, and extremely soft coal seam 0.8>f>0.1Five categories,
Coal cutters are generally suitable for cutting coal seam hardness.f≤ 4 working face.
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