||Investigation of Use of Gel Material for Mine Sealing.
Chun, Nevill K. ;
||Dravo Corp., Pittsburgh, Pa.
||EPA-14010-EKW; R2-73-135,; 10880
( Mines(Excavations) ;
( Seals(Stoppers) ;
Ground water ;
Water pollution ;
||Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy.
Laboratory testing of commercially available chemical grouts was conducted to evaluate their potential use, in conjunction with a cheap filler, for remote sealing of mine voids. By close control of the setting time and proper distribution of the grout slurry it was believed that a mine seal could be placed through a borehole from the surface without the benefit of retaining bulkheads. A slurry mix consisting of an acrylamide grout with flyash or mine refuse as a filler was found to produce a strong controllable gel which resisted chemical attack in the laboratory over an eleven week exposure period. An attempt to demonstrate a novel technique for application of the selected grout slurry in a mine entry with high flow was not successful. (Modified author abstract)