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d amp3bb section in underground cal mining

d amp3bb section in underground cal mining

Everyunderground coal mining sectionin the United States operates under a MSHA-approvedmineventilation plan, which contains provisions for methane and dust control, as specified in 30 CFR 75.370. The dust control portion of the ventilation plan is specifically developed by themineoperator for eachsectionin themineand approved by the ...

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