West Virginia Code of State Rules › Agency 36 - Coal Mine Health And Safety › Title 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

Current through Register Vol. XLI, No. 28, July 12, 2024
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.