[Code of Federal Regulations]

[Title 30, Volume 1]

[Revised as of July 1, 2006]

From the U.S. Government Printing Office via GPO Access

[CITE: 30CFR56.6902]



[Page 288]

 

                       TITLE 30--MINERAL RESOURCES

 

  CHAPTER I--MINE SAFETY AND HEALTH ADMINISTRATION, DEPARTMENT OF LABOR

 

PART 56_SAFETY AND HEALTH STANDARDS_SURFACE METAL AND NONMETAL MINES

--Table of Contents

 

                          Subpart E_Explosives

 

Sec.  56.6902  Excessive temperatures.



    (a) Where heat could cause premature detonation, explosive material 

shall not be loaded into hot areas, such as kilns or sprung holes.

    (b) When blasting sulfide ores where hot holes occur that may react 

with explosive material in blastholes, operators shall--

    (1) Measure an appropriate number of blasthole temperatures in order 

to assess the specific mine conditions prior to the introduction of 

explosive material;

    (2) Limit the time between the completion of loading and the 

initiation of the blast to no more than 12 hours; and

    (3) Take other special precautions to address the specific 

conditions at the mine to prevent premature detonation.