[Code of Federal Regulations]
[Title 30, Volume 1]
[Revised as of July 1, 2002]
From the U.S. Government Printing Office via GPO Access
[CITE: 30CFR75.332]

[Page 477-478]
 
                       TITLE 30--MINERAL RESOURCES
 
  CHAPTER I--MINE SAFETY AND HEALTH ADMINISTRATION, DEPARTMENT OF LABOR
 
PART 75--MANDATORY SAFETY STANDARDS--UNDERGROUND COAL MINES--Table of Contents
 
                         Subpart D--Ventilation
 
Sec. 75.332  Working sections and working places.

    (a)(1) Each working section and each area where mechanized mining 
equipment is being installed or removed, shall be ventilated by a 
separate split of intake air directed by overcasts, undercasts or other 
permanent ventilation controls.
    (2) When two or more sets of mining equipment are simultaneously 
engaged in cutting, mining, or loading coal or rock from working places 
within the same working section, each set of mining equipment shall be 
on a separate split of intake air.
    (3) For purposes of this section, a set of mining equipment includes 
a single loading machine, a single continuous mining machine, or a 
single longwall or shortwall mining machine.
    (b)(1) Air that has passed through any area that is not examined 
under Secs. 75.360, 75.361 or 75.364 of this subpart, or through an area 
where second mining has been done shall not be used to ventilate any 
working place. Second mining is intentional retreat mining where pillars 
have been wholly or partially removed, regardless of the amount of 
recovery obtained.

[[Page 478]]

    (2) Air that has passed by any opening of any unsealed area that is 
not examined under Secs. 75.360, 75.361 or 75.364 of this subpart, shall 
not be used to ventilate any working place.