Installation and stability of inverted pyramid-shaped plugs for closing abandoned mine shafts Galena, KS demonstration project.
Mine Drainage and Surface Mine Reclamation. Volume I: Mine Water and Mine Waste. Vol. I. Pittsburgh, PA: U.S. Bureau of Mines, 1988 Apr; :405-413
The Bureau of Mines designed and installed 11 inverted- pyramidal- shaped plugs in a mine closure demonstration project completed in Galena, Kansas in December 1983. The demonstration project resulted from a study done by the Geological Surveys of Missouri, Kansas, and Oklahoma for the U.S. Bureau of Mines in January 1983. This study identified over 1400 open mine shafts and nearly 500 subsidence collapse features that remained from the original 14,000 shafts sunk in the Tri-State Zinc-Lead Mining District. In Galena, Kansas, alone over 377 open mine shafts were readily accessible and 150 abandoned mine shafts were within the city limits. Of these, the Bureau of Mines selected 14 abandoned sites for the mine shaft closure demonstration project. During the demonstration project, 11 mine shafts were closed with the inverted pyramid shaped reinforced- concrete plugs, 2 were closed with reinforced concrete caps after backfilling, and one shaft was closed by backfilling only. The stability of the closure devices has been monitored and evaluated over a 3-year period. The results indicate that the Bureau of Mines closure devices are stable and have eliminated hazards associated with open mine shafts in a populated area.
Mine-shafts; Mining-industry; Mine-disasters; Occupational-hazards; Environmental-hazards
IH; Conference/Symposia Proceedings
Mine Drainage and Surface Mine Reclamation. Volume I: Mine Water and Mine Waste