[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: 30CFR75.223]

[Page 467]
 
                       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 C--Roof Support
 
Sec. 75.223  Evaluation and revision of roof control plan.

    (a) Revisions of the roof control plan shall be proposed by the 
operator--
    (1) When conditions indicate that the plan is not suitable for 
controlling the roof, face, ribs, or coal or rock bursts; or
    (2) When accident and injury experience at the mine indicates the 
plan is inadequate. The accident and injury experience at each mine 
shall be reviewed at least every six months.
    (b) Each unplanned roof fall and rib fall and coal or rock burst 
that occurs in the active workings shall be plotted on a mine map if it-
-
    (1) Is above the anchorage zone where roof bolts are used;
    (2) Impairs ventilation;
    (3) Impedes passage of persons;
    (4) Causes miners to be withdrawn from the area affected; or
    (5) Disrupts regular mining activities for more than one hour.
    (c) The mine map on which roof falls are plotted shall be available 
at the mine site for inspection by authorized representatives of the 
Secretary and representatives of miners at the mine.
    (d) The roof control plan for each mine shall be reviewed every six 
months by an authorized representative of the Secretary. This review 
shall take into consideration any falls of the roof, face and ribs and 
the adequacy of the support systems used at the time.

[53 FR 2375, Jan. 27, 1988; 60 FR 33723, June 29, 1995]