Mine Index 0974 Monterey Coal Company, Monterey No. 2 Mine

Mine Index Number: 0974

Company Name:	Monterey Coal Company
Mine Name:	Monterey No. 2 Mine
Start Date:	1977	End Date:	1996
Type of Mine:	Underground
Total acres shown:	7,565
Acres after map date:		General Area of mining acres shown:

Shaft, Slope, Drift or Tipple Location(s)

Type	County	Township-Range	Section	Part Section

Main slope

Clinton

1N 5W

13

NW SW SE

Air/escape shaft

Clinton

1N 5W

13

NW SW SE

Air shaft

Clinton

1N 5W

13

SE SW SW

Geology

		Thickness (ft)
Seam	Depth (ft)	Min	Max	Ave	Mining Method

Herrin

330

6.0-7.0

BRP

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

Mine Name

Date

Production (tons)

Monterey Coal Company (add)	Monterey No. 2 (add)	1977-1996	46,677,010

Production Notes

Coal Report production (if available)

Sources of Data

Source Map

Map Date

Original Scale

Digitized Scale

Map Type

Company

7-19-1996

1:4800

1:4800

Final

Annotated Bibliography (Data source - brief description of information)

Coal Reports - Production, ownership, years of operation, seam, depth, thickness.

Directory of Illinois Coal Mines (Clinton County) - Mine names, mine index, ownership, years of operation.

ENR Document 85/01 - Mining method.

Mine notes (Clinton County) - Mine type, shaft location and size, seam, depth, thickness, geologic problems.

Company map, Coal Section files - Mine outline, shaft locations, mining method, geologic problems.