Mine Emergency Communication: Options, Issues, & Futures Randall Harris W. Va. Office of Miners’ Health Safety and Training May 5, 2007 West Virginia Coal.

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Presentation transcript:

Mine Emergency Communication: Options, Issues, & Futures Randall Harris W. Va. Office of Miners’ Health Safety and Training May 5, 2007 West Virginia Coal Mining Institute Glade Springs Daniels, WV

WV SB 247 and the Miner Act did not revoke the laws of physics Communication Reality WV §56-4 drafted with all the laws in mind

WV § 56-4 Wireless – miner not connected by wire Two-way communications to each miner in at least two separate airways Tracking each miner in relation to known points prior and in escapeways after Operators submit Communication/Tracking Plan by July 31, 2007 –Understand needs and thought through risks –Survive accident or be quickly repairable –Communication center operator needs red-hat card

ELF-LFMFVHF-UHF Few Spectrum Options Practical options are limited by physics and existing uses

Through The Earth (TTE) Limitations: Interference Sources Antenna Size Knowledge Base Safety Understandings Bandwidth Limitations No Market Base

Medium Frequency (MF) Limitations: Knowledge Base Bandwidth Limitations Limited Market Base Unknown Susceptibility Belt Cable

Wi-Fi Mesh Nodes Limitations: Knowledge Base Safety Understandings Limited Range Susceptible to explosion Nodes

Leaky Feeder VHF Limitations: Bandwidth Limitations Limited Range Susceptible to explosion

Leaky Feeder UHF Limitations: Bandwidth Limitations Susceptible to explosion

Leaky Feeder Coverage Enhancement

Next Generation…Redundancy What happens if 2000 feet of all entries lost?

Phase 1 – Non-Redundant Wireless* Coverage Phase 2 – Bi-Directional Communication Pathway Redundancy Phase 3 – Redundant radio coverage systems (one hardened) and coverage enhancements Evolving NIOSH Approach * Wireless definition as in WV 56-4

WV Path Forward WV functionality approvals underway Continued NIOSH study group interaction MHSA IS approval process continues WV Communication Plan submittals Installation dates subject to manufacturers receiving all needed MSHA approvals