Statutes, codes, and regulations
West Virginia Administrative Code
Agency 36 - Coal Mine Health And SafetyTitle 36 - LEGISLATIVE EXEMPT RULE BOARD OF COAL MINE HEALTH AND SAFETY
Series 36-01 - Rules And Regulations Governing Approvals And Permits, Explosives And Ventilation For The Construction Of Shaft And/or Slope Operations In The State Of West Virginia
Section 36-1-19 - Emergency Communications Requirements

W. Va. Code R. § 36-1-19

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Current through Register Vol. XLI, No. 50, December 13, 2024
Section 36-1-19 - Emergency Communications Requirements
19.1. Each operator of a shaft and/or slope shall establish and maintain a communication system from the shaft and/or slope to the nearest point of medical assistance for use in an emergency.
19.2. The emergency communications system required to be maintained under Section 19.1. of this rule may be established by telephone or radio transmission or by any other means of prompt approved communications to any facility (for example, the local sheriff, the state police or local hospital) which has available the means of communication with the person or persons providing emergency medical assistance or transportation in accordance with the provisions of Section 19.1. of this rule.
19.3. Precautions shall be taken to prevent accidental discharge of electric blasting caps from current induced by mobile transmitters. The following precautions are recommendations of the Institute of the Makers of Explosives Publication No. 20, shall be complied with: Recommended Distances for One Ohm Electric Detonators from RF Sources such as Fixed and Mobile Transmitters, Including Cellular Telephone Service, Amateur Radio and Citizens' Band

Recommended Distances for One Ohm Electric Detonators from RF Sources such as Fixed and Mobile Transmitters, Including Cellular Telephone Service, Amateur Radio and Citizens' Band

MINIMUM DISTANCE (Feet)

Transmitter1 Power (Watts) MF 1.7 to 3.4 MHz Fixed, Mobile, Maritime HF 28 to 29.7 MHz Amateur VHF 35 to 36 MHz Public Use 42 to 44 MHz Public Use 50 to 54 MHz Amateur VHF 144-148 MHz Amateur 150.8-161.6 MHZ Public Use UHF 450 to 470 MHz Public Use Cellular Telephones above 800 MHz
1 15 47 37 12 8
3 25 81 64 21 14
5 33 105 82 27 18
10 46 148 116 38 25
50 102 331 259 85 55
100 144 468 366 120 78
1802 193 627 491 161 104
200 204 661 518 170 110
250 228 739 579 190 123
5003 322 1,045 818 268 174
6004 353 1,145 897 294 190
1,000 455 1,478 1,157 379 245
1,5005 557 1,810 1,417 464 300
10,0006 1,438 4,673 3,659 1,198 775

Recommended Distances for One Ohm Electric Detonators from Citizens Band, Class D Transmitters 26.965 MHz (Channel 1) 27.405 MHz (Channel 40)

Recommended Minimum Distance

Type

Hand-Held

Vehicle-Mounted

Double Sideband - 4 Watts Maximum Transmitter Power

5 feet

65 feet

Single Sideband -12 Watts (Peak Envelope Power)

20 feet

110 feet

1Power delivered to the antenna.

2Maximum power to two-way mobile units in VHF (150.8 or 161.G MHz range) and for two-way mobile and fixed station units in UHF (450 to 460 MHz range).

3Maximum power for major VHF two-way mobile and fixed station units in 35 to 44 MHz range.

4Maximum power for two-way fixed station units in VHF (150.8 to 161.6 MHz range).

5Maximum power for amateur radio mobile use.

6Maximum power for some base stations in 42 to 44 MHz band and 1.6 to 1.8 MHz band.

Note, this chart is found in the Institute of the Makers of Explosives publication No. 20, December 2011.

W. Va. Code R. § 36-1-19