Volume 23 Issue 4
Aug.  1995
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Chen Gang, Liang Jinghua, Chen Qian, Cheng Zengqing. ULTRASONIC PHYSICAL FORWARD SIMUL ATION FOR INVESTIGATING THE ABANDONED PIT[J]. COAL GEOLOGY & EXPLORATION, 1995, 23(4): 54-59.
Citation: Chen Gang, Liang Jinghua, Chen Qian, Cheng Zengqing. ULTRASONIC PHYSICAL FORWARD SIMUL ATION FOR INVESTIGATING THE ABANDONED PIT[J]. COAL GEOLOGY & EXPLORATION, 1995, 23(4): 54-59.
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ULTRASONIC PHYSICAL FORWARD SIMUL ATION FOR INVESTIGATING THE ABANDONED PIT

  • Beijing Coal Mining Institute, CCMRI;

  • 2. China Coal Geo-exploration Bureau

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  • Received Date: February 05, 1995
  • Available Online: April 02, 2023
    Graphical Abstract
    • Abstract
  • In this paper, by the ultrasonic physical forward simulation, the reflection dynamic characteristics on the single entry type for diffrent void dimensions are analyzed, the relationships of the reflection amplitude with the size of the void to wavelength ratio are revealed, and 3 meter minimum resolving power in reflection for discovering the void are found out. Secondly, the type of large mining area is simplified, and its kinematic and dynamic characteristics of reflection are expounded. Finally, the reflected longitudinal and transverse wave for locating the multiple entry type are discussed.
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