Browse Prairie Research Institute by Author "Hunt, Stephen R."

  • Krausse, Hans Friedrich; Damberger, H.H.; Nelson, W.J.; Hunt, Stephen R.; Ledvina, C.T.; Treworgy, C.G.; White, W.A. (Urbana, Ill. : Illinois State Geological Survey, 1979)
    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 ...


    application/pdfPDF (5MB)