N.J. Admin. Code § 12:190-5.20

Current through Register Vol. 57, No. 1, January 6, 2025

Section 12:190-5.20 - Storage for underground mines

(a) This section shall apply to storage of explosives for underground mining operations.

(b) This section shall also apply to the construction and location of type UG magazines.

(c) A magazine for explosives shall not be permitted underground, until the underground workings are developed to a point where the magazine:

1. Is at least 300 feet from any shaft;

2. Is at least 15 feet from any haulage way or travel way;

3. Has a travel way to the nearest means of egress with at least two sharp turns;

4. Could not impede excavation of all persons in the event of accidental detonation of the explosives in the magazine; and

5. Is at least 50 feet from any magazine containing blasting caps.

(d) A type UG magazine shall be used for the storage of explosives underground.

(e) The amount of explosives stored underground in a mine in a magazine shall not exceed 5,000 pounds.

(f) Any explosives in excess of the amount required for one day's underground mining operations when stored underground in a mine shall be stored in a Type 5 approved magazine constructed in accordance with (i) below.

(g) Daily supplies of explosives within a mine at any working place shall be kept in approved containers constructed in accordance with (j) below.

(h) Prior to closing any part of a mine, all explosives contained therein shall be removed.

(i) A type UG magazine shall be constructed:

1. In solid rock with the front opening constructed in accordance with Table 5.3 of N.J.A.C. 12:190-5.3;

2. With doors of 2 inches of hardwood covered with 26 gauge sheet metal or the equivalent;

3. With hinges and hasps complying with N.J.A.C. 12:190-5.3(j), (k), (l), (m), and (n);

4. With one padlock complying with N.J.A.C. 12:190-5.3(k) and (l);

5. So that water will drain away;

6. With a floor that is wood lined or covered with wooden slats;

7. With doors having at least 16 gauge metal outer covering or equivalent fire resistive protection and lined with at least two inches of hardwood;

8. With no artificial heat;

9. Internal lighting by approved electric safety battery lamps or approved electric lights, wiring and equipment of a type designed for the hazardous location;

10. With adequate ventilation; and

11. With a conspicuous marking reading: "EXPLOSIVES".

(j) Containers shall be substantially constructed of plywood or equivalent at least one inch thick, painted red, and marked "Explosives" in letters of at least three inches in height on a contrasting background.

N.J. Admin. Code § 12:190-5.20

Administrative correction.
See: 29 New Jersey Register 566(a).