Damage to Residential Structures from Surface Mine Blasting.
Proc At SME/AIME Fall Mtg and Exhibition Minneapolis Minnesota, 1980 Oct; :17 pages
The Bureau of Mines has studied the problem of cracking in residential structure walls from vibrations produced by blasting in surface mines. Direct observations were made of blasting damage consisting primarily of cosmetic cracking in plaster and gypsum board walls. Measurements of structure response and also application of the response spectra analysis single-degree-of- freedom model were used to quantify the frequency dependence of the safe level criteria. An overall summary analysis was performed and data obtained from nine previous studies, including the three analyzed earlier by the Bureau for bulletin 656 published in 1971. Separate analysis of the high- and low-frequency damage cases, structural response, and two types of construction resulted in the establishment of safe vibration levels ranging from 12 mm/sec to 50 mm/sec (0.5 In/sec to 2.0 In/sec).
Proc. At SME/AIME Fall Mtg. and Exhibition, Minneapolis, MN, October 1980, SME Preprint 80-362