U.S. flag An official website of the United States government.
Official websites use .gov

A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS

A lock ( ) or https:// means you've safely connected to the .gov website. Share sensitive information only on official, secure websites.

i

Investigation of Electromagnetic Emissions in a Deep Underground Mine

Public Domain
File Language:
English


Details

  • Personal Author:
  • Corporate Authors:
    National Institute for Occupational Safety and Health. Spokane Research Laboratory
  • Description:
    Highly stressed rock in stopes continues to be a primary safety risk for miners in underground mines because it can result in failures of ground that lead to both injuries and death. Spokane Research Laboratory personnel investigated electromagnetic (EM) emissions in a deep underground mine in an effort to determine if these emissions could be used as indicators of impending catastrophic ground failure. Results suggest that (1) there is no increase in the number of EM emissions prior to recorded seismic activity, (2) some EM signals are generated during blasting, (3) interference from mine electrical sources mask seismic-generated EM signals, (4) EM emissions do not give enough warning (compared to seismic monitoring) to permit miners to leave a stope, (5) the distance an EM signal can travel in the rock is between 18 and 40 m, and (6) current data acquisition systems do not differentiate between EM signals generated from seismic activity and random mine electrical noise. These results preclude monitoring EM emissions as precursors of impending catastrophic ground failure.
  • Subjects:
  • Source:
    2004 SME Annual Meeting, Feb 23-25, Denver, Colorado, preprint 04-79. Littleton, CO: Society for Mining, Metallurgy, and Exploration, Inc., 2004 Feb; :1-7
  • Document Type:
    Text
  • Genre:
    Conference Publications
  • CIO:
    National Institute for Occupational Safety and Health (NIOSH)
  • NIOSHTIC Number:
    nn:20029168
  • Collection(s):
  • Main Document Checksum:
    urn:sha-512:a0a3670d6f17c85f0ece5d9bfc81abac8a689c840773188e30c62ee92a6de607f2e4187de8a4b6ec5cf9efd848a328804ac40bdb6cd7cbfc73dec57abd644e0f
  • Download URL:
  • File Type:
    Filetype[PDF - 198.89 KB ]
PREVIOUS
File Language:
English
ON THIS PAGE
Details
CDC STACKS serves as an archival repository of CDC-published products including scientific findings, journal articles, guidelines, recommendations, or other public health information authored or co-authored by CDC or funded partners.

As a repository, CDC STACKS retains documents in their original published format to ensure public access to scientific information.
BACK TO TOP