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Survey of Blasting Effects on Ground Water Supplies in Appalachia. Part II.
Berger-PR; Froedge-DT; Gould-JA; Kreps-LF
NTIS: PB/84-113182 :114 pages
This report covers an 18-month study of the performance of a 300-ft- deep test water well located at the ayrshire mine of the Amax Coal Company near Evansville, Indiana. Well performance, as characterized by 10- hr drawdown tests, was monitored as the strip mining operation approached the well site from distances of 2,000 to 15 ft (overburden removal). Blast-induced ground motion was measured at the surface next to the test well, and peak particle velocities in excess of 4 in/s were obtained. No evidence of changes in water quantity or quality could be directly attributed to the blasts. However, some lowering of the static water level in the observation well, and a simultaneous increase in the adjusted specific capacity of the test well, suggest that overburden removal caused lateral stress relief with consequent opening of vertical fractures.
CP; Final Contract Report;
NTIS Accession No.
Philip Berger and Associates