Mine Index Number: 0974
Company Name:
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Monterey Coal Company
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Mine Name:
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Monterey No. 2 Mine
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Start Date:
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1977
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End Date:
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1996
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Type of Mine:
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Underground
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Total acres shown:
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7,565
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Acres after map date:
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|
General Area of mining acres shown:
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|
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Shaft, Slope, Drift or Tipple Location(s)
Type
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County
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Township-Range
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Section
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Part Section
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Main slope
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Clinton
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1N 5W
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13
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NW SW SE
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Air/escape shaft
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Clinton
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1N 5W
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13
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NW SW SE
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Air shaft
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Clinton
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1N 5W
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13
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SE SW SW
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Geology
Geological Problems Reported
Large slips which weaken the roof are common in the gray shale. Most of the roof is black Anna Shale; the gray shale occurs in pods. A series of slips occurs in the Anna Shale; this made an unstable roof. Roof falls were generally minor, as bolting to limestone (30 inches to 17 feet up) was the common practice. This was interpreted not as a roof control problem, but rather that the miners must wait for the bolter when the 17-foot bolts were required. Some of the bolts failed 9 years later, and the map shows numerous roof falls. Rolls were reported where both top comes down and the bottom comes up. At least one large clay dike was present, which pinched out in about the middle of the seam. A large clay-dike (not tectonic) fault is present, with a throw of about 5 feet, with another series of parallel slips (seriously weakening the roof). The map shows several faulted areas with 5 to 10 feet of displacement. Gas emission was high on freshly-mined face. High reject partings were present in the
north and east parts of mine.
Production
Company
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Mine Name
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Date
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Production (tons)
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Production Notes
Coal Report production (if available)
Sources of Data
Company
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7-19-1996
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1:4800
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1:4800
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Final
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Annotated Bibliography (Data source - brief description of information)
Coal Reports - Production, ownership, years of operation, seam, depth, thickness.
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Directory of Illinois Coal Mines (Clinton County) - Mine names, mine index, ownership, years of operation.
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ENR Document 85/01 - Mining method.
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Mine notes (Clinton County) - Mine type, shaft location and size, seam, depth, thickness, geologic problems.
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Company map, Coal Section files - Mine outline, shaft locations, mining method, geologic problems.
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Mine Notes
Mine Images
Photographs
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