Roof strata of the Herrin (no. 6) coal member in mines of Illinois : their geology and stability

Krausse, Hans Friedrich; Damberger, H.H.; Nelson, W.J.; Hunt, Stephen R.; Ledvina, C.T.; Treworgy, C.G.; White, W.A.

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Description

Title

Roof strata of the Herrin (no. 6) coal member in mines of Illinois : their geology and stability

Author(s)

• Krausse, Hans Friedrich
• Damberger, H.H.
• Nelson, W.J.
• Hunt, Stephen R.
• Ledvina, C.T.
• Treworgy, C.G.
• White, W.A.

Issue Date

1979

Keyword(s)

Coal mines and mining

Geographic Coverage

Illinois

Abstract

Roof failures in underground coal mines are related to the lithology and geologic structure of the roof. There are two distinct suites of roof rock above the Herrin (No. 6) Coal in Illinois, and each has distinctive patterns of structure and roof failure. In black shale-limestone roof areas, roof instability is correlated with thinning of limestone beds and presence of faults and clay dikes. In gray shale roof regions, the prime roof hazards are posed by rolls, shear bodies, and presence of coal or carbonaceous partings in the roof. Most structural features examined are believed to have formed during early stages of sediment diagenesis and compaction. Structural trends and lithologic patterns are strongly interdependent for this reason. In many cases geologic patterns are so complex and locally variable that prediction of roof stability far in advance of mining is difficult. The need for greater flexibility in roof control planning is apparent.

Publisher

Urbana, Ill. : Illinois State Geological Survey

Series/Report Name or Number

Illinois minerals no. 072

Type of Resource

text

Language

eng

Permalink

http://hdl.handle.net/2142/44961

Has Version(s)

• http://hdl.handle.net/10111/UIUCOCA:roofstrataofherr72krau
• http://www.archive.org/details/roofstrataofherr72krau

Copyright and License Information

Copyright 1979 Board of Trustees University of Illinois.

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