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Use of sonic techniques in exploring coal-mine roof strata :a progress report

Characteristics of ultrasonic ranging sensors in an underground environment

Published Year

• 1960-1969 (1)
• 1990-1999 (1)

Subject

• Sonar (2) *
• Coal mines and mining (1)
• Mine roof control (1)
• Mining machinery--Automatic control (1)

Author

• King, Robert H. (1)
• Miller, Thomas C. (1)
• Mongan, Charles E., (1)
• Strickland, W. H. (1)

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