Delineation of Zones of Acid Mine Drainage Using Surface Geophysics.
1982 Symp. on Surface Min. Hyd., Sediment. and Reclam., 1982 Dec :279-287
Electromagnetic (em) induction terrain conductivity surveys were conducted at three reclaimed surface mines in Pennsylvania to evaluate potential applications of the technique in acid mine drainage (AMD) control. At a 6-ha (15-acre) reclaimed strip mine with a perennial acidic seep issuing from the base of the spoil backfill, 2 days of em surveying defined the locations of two pockets of acid-producing preparation plant refuse buried in the spoil and yielded information on the probable flow of ground water from the acid source to the seep. At an 8-ha (20-acre) reclaimed surface mine with acid discharges from subdrains and an intermittent seep, less than 2 days of em surveying established the approximate positions of the buried high and low walls, defined probable flow paths to the drain outlets, and located a potential zone of ground water storage within the spoil contributing to the acidic seep. At a 15-ha (37-acre) reclaimed mountaintop removal mine with two large areas of perennial acid seeps, 3 days of em surveying located zones of stored water within the spoil and probable flow to the seepage areas. The results of these studies indicate that the high conductivity associated with AMD and AMD sources is a good target for electrical detection.
1982 Symp. on Surface Min. Hyd., Sediment. and Reclam., Lexington, Kentucky, Dec. 5-10, 1982, pp. 279-287