Mine roof vibrations from production blasts, Shullsburg Mine, Shullsburg, Wisconsin

Technical Report · Tue Dec 01 04:00:00 EST 1970

OSTI ID:5267689

Olson, J J; Dick, R A; Fogelson, D E; Fletcher, L R

The Bureau of Mines recorded both particle accelerations and velocities from one-stick and production blasts at Eagle-Picher Industries' Shullsburg mine, Shullsburg, Wis., to test the effectiveness of square root scaling in grouping underground blast vibrations and to determine the effects of rock type and mine geometry on blast vibrations. Although the charge weights of subsequent delay periods sometimes exceeded the charge weight of the zero-delay period, both acceleration and velocity records showed that the zero-delay portion of the Shullsburg production blasts produced the highest vibration amplitudes. Because of the restricted range of charge weights in the Shullsburg experiments, no statistical determination of an appropriate scaling factor could be made. However, the square root scaled peak particle velocity data from the Shullsburg production blasts grouped well within the approximate band width of vibration data obtained by the Bureau from quarry blasts in many different rock types. This indicates that scaling by some factor, perhaps the square root or cube root of the charge weight, may be an effective way to group and study vibration data from underground blasts. Further research is needed to determine which scaling factor is best for underground blasting.

• Research Organization: Bureau of Mines, Washington, D.C. (USA)
• OSTI ID: 5267689
• Report Number(s): BM-RI-7462
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
422000* -- Engineering-- Mining & Underground Engineering-- (1980-)
EXPLOSIONS
MECHANICAL VIBRATIONS
MINES
ROOFS
SCALING LAWS