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Instrumentation to Monitor Subsidence Associated With High Extraction Mining in the Illinois Basin.
NTIS: PB 88-241922 :60 pages
Prime cropland and underground coal reserves constitute two significant natural resources in the state of Illinois. Utilization of both agricultural and mineral resources suggests the development of high-extraction mining methods which minimize damage to the over- lying croplands. Several Illinois agencies have therefore instituted a program to study high-extraction mining methods in an effort to characterize surface damage caused by subsidence. In support of this program, Engineers International, Inc. undertook a program from the U.S. Bureau of Mines, Twin Cities Research Center, to select and emplace appropriate subsidence instrumentation over a high-extraction mine panel selected by the cooperating Illinois state agencies. This instrumentation was to provide subsidence data for both short-term and long-term subsidence and hydrological effects of mining. The emplaced instrumentation included multipoint borehole extensometers (mbpx), observation wells, piezometers, subsidence monuments, and control monuments to provide local horizontal and vertical control. A suite of laboratory tests was conducted on specimens recovered during drilling, and rock properties data were culled from published and Engineers International, Inc. file data.
CP; Final Contract Report;
NTIS Accession No.
NTIS: PB 88-241922
Engineers International, Inc.
Page last reviewed: April 12, 2019
Content source: National Institute for Occupational Safety and Health Education and Information Division