ULTRASONIC CONVERGENCE MEASUREMENTS.

被引：0
|
作者：
McVey, James R.
机构：
来源：
Report of Investigations - United States, Bureau of Mines | 1984年
关键词：
ULTRASONIC TRANSDUCERS - Applications;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
Tests during pillar robbing, longwall operations, and other mining activities indicate that roof-floor convergence rates can be used as an indicator of imminent roof failure. New instruments provide nonobstructing measurements up to 35 ft away. The ultrasonic transducers can be attached to a roof bolt, placed in an unsupported area (by means of a toss basket), or handheld.
引用
收藏
相关论文
共 50 条
  • [1] HIGH FREQUENCY ULTRASONIC MEASUREMENTS.
    Zarsav, N.
    Measurement and Control, 1988, 21 (05) : 133 - 136
  • [2] Ultrasonic systems for liquid absorption measurements.
    Skowronski, J
    Gruener, G
    de Groot, W
    ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY, 2004, 228 : U461 - U461
  • [3] Determination of the main components of milk using ultrasonic measurements.
    Funck, T
    ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY, 1997, 214 : 86 - AGFD
  • [4] ESTIMATION OF IN-SITU STRESSES FROM ULTRASONIC MEASUREMENTS.
    Mao, N.H.
    Sweeney, J.J.
    SPE Formation Evaluation, 1986, 1 (05): : 532 - 538
  • [5] Ultrasonic pulse-phase method applied in ultrasonic fluid flow measurements.
    Pavlovic, V
    Stojcev, M
    Dimitrijevic, B
    Golubovic, L
    Zivkovic, M
    Stankovic, L
    IEE PROCEEDINGS-SCIENCE MEASUREMENT AND TECHNOLOGY, 1996, 143 (05) : 327 - 333
  • [6] DETECTION OF CRACK GROWTH IN CONCRETE FROM ULTRASONIC INTENSITY MEASUREMENTS.
    Suaris, Wimal
    Fernando, Viraj
    Materials and Structures/Materiaux et Constructions, 1987, 20 (ll7): : 214 - 220
  • [7] ULTRASONIC BEVELING METHOD FOR GLASS MICROPIPETTES USED IN ELECTROPHYSIOLOGICAL MEASUREMENTS.
    Abe, Toshimi
    Dendo, Isao
    Tohoku Kogyo Daigaku Kiyo, 1: Rikogakuhen, 1984, (04): : 1 - 6
  • [8] MEASUREMENTS.
    Vardhan, H.
    CSIO Communications (Central Scientific Instruments Organization), 1982, 9 (2-3): : 52 - 60
  • [9] Probabilistic modelling of an ultrasonic setup:: calculation of the dispersion on wave speed measurements.
    Macocco, K
    Grimal, Q
    Naïli, S
    Soize, C
    COMPTES RENDUS MECANIQUE, 2005, 333 (07): : 565 - 573
  • [10] Magnetic measurements.
    不详
    NATURE, 1916, 96 : 87 - 88
12345