SUBSIDENCE OF BEDROCK ABOVE ABANDONED COAL MINES IN ILLINOIS PRODUCES FEW FRACTURES.

Research output: Chapter in Book/Report/Conference proceedingChapter

Abstract

Investigations of bedrock within subsided areas over abandoned coal mines in Illinois reveal little disturbance of the bedrock. In areas that have surface subsidence of 0. 3 to 1 m (1 to 3. 25 ft), examination of cores from exploration drilling and investigations of the boreholes by means of closed circuit television have shown that fractures are spaced at least 0. 9 to 3. 6 m (3 to 12 ft) apart. The amount of fracturing found in the collapsed area decreased as the amount of soft, weak materials increased in the immediate overburden of the mine.

Original languageEnglish (US)
Title of host publicationTransactions of the American Institute of Mining, Metallurgical, and Petroleum Engineers, Society
Pages1955-1960
Number of pages6
Volume280
Editionpt A
StatePublished - Dec 1 1986
Externally publishedYes

ASJC Scopus subject areas

  • Engineering(all)

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