Effects of coal mine subsidence in the Sheridan, Wyoming, area

Dunrud, C. Richard; Osterwald, Frank W.

doi:10.3133/pp1164

Cited by 18 publications

(10 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Coal-bed fire was caused by July 2002 range fire that burned trees rooted in coal beds. control projects by the Wyoming State Abandoned Mine Land Division, as well as research by the US Geological Survey (Dunrud and Osterwald, 1980). One coal-bed fire is currently burning near the northern edge of the Acme mine (Bleizeffer, 2002).…”

Section: What Starts Coal-bed Fires? What Puts Them Out?mentioning

confidence: 98%

Geologic history of natural coal-bed fires, Powder River basin, USA

Heffern

Coates

2004

International Journal of Coal Geology

138

View full text Add to dashboard Cite

Section: What Starts Coal-bed Fires? What Puts Them Out?mentioning

confidence: 98%

Geologic history of natural coal-bed fires, Powder River basin, USA

Heffern

Coates

2004

International Journal of Coal Geology

138

View full text Add to dashboard Cite

“…Mines and Lease Boundaries--This coverage shows all of the Wyodak-Anderson mine areas and lease boundaries (figure 6). The boundaries came from several sources, including the Bureau of Land Management (1996), Kennecott Energy and others (not dated), and Dunrud and Osterwald (1980). The coverage is used for graphic displays and for clipping out areas where we did not want to report coal resource calculations.…”

Section: Montana Wyomingmentioning

confidence: 99%

Preliminary report on methodology for calculating coal resources of the Wyodak-Anderson coal zone, Powder River basin, Wyoming and Montana

Ellis¹,

Gunther²,

Flores³

et al. 1998

Open-File Report

View full text Add to dashboard Cite

The National Coal Resource Assessment of the Wyodak-Anderson coal zone includes reports on the geology, stratigraphy, quality, and quantity of coal. The calculation of resources is only one aspect of the assessment. Without thorough documentation of the coal resource study and the methods used, the results of our study could be misinterpreted. The task of calculating coal resources included many steps, the use of several commercial software programs, and the incorporation of custom programs. The methods used for calculating coal resources for the Wyodak-Anderson coal zone vary slightly from the methods used in other study areas, and by other workers in the National Coal Resource Assessment. The Wyodak-Anderson coal zone includes up to 10 coal beds in any given location. The net coal thickness of the zone at each data point location was calculated by summing the thickness of all of the coal beds that were greater than 2.5 ft thick. The amount of interburden is not addressed or reported in this coal resource assessment. The amount of overburden reported is the amount of rock above the stratigraphically highest coal bed in the zone. The resource numbers reported do not include coal within mine or lease areas, in areas containing mapped Wyodak-Anderson clinker, or in areas where the coal is extrapolated to be less than 2.5 ft thick. The resources of the Wyodak-Anderson coal zone are reported in Ellis and others (1998). A general description of how the resources were calculated is included in that report. The purpose of this report is to document in more detail some of the parameters and methods used, define our spatial data, compare resources calculated using different grid options and calculation methods, and explain the application of confidence limits to the resource calculation. Tribal Lands Miles Kilometers Figure 6. Maps showing the Montana/Wyoming state boundary, counties, the Powder River Basin boundary, tribal lands, and Wyodak-Anderson coal zone clinker, mines, and lease areas.

show abstract

“…This resultant value, Is(50), is then referred to as the point-load strength index. More than one empirically determined coefficient (ranging from 22 to 35), by which the point-load strength index is to be multiplied by to obtain an approximation of unconfined compressive strength, appear in today's literature (Dunrud and Osterwald, 1980). For consistency with the previously published field test data others, 1980, 1982;others, 1983, 1986) all of the approximated unconfined compressive strength values on plates 1-4 are computed by multiplying the resultant value (Is(50)) by Brock and Franklin's (1972) empirical coefficient of 24.…”

Section: Point-load Strength Indexmentioning

confidence: 99%

Compilation of field and laboratory geotechnical test data for U.S. Geological Survey drill holes 1C-79, 2C-80, CW 81-2, and CE 82-1, Beluga resource area, upper Cook Inlet region, Alaska

Effects of coal mine subsidence in the Sheridan, Wyoming, area

Cited by 18 publications

References 0 publications

Geologic history of natural coal-bed fires, Powder River basin, USA

Geologic history of natural coal-bed fires, Powder River basin, USA

Preliminary report on methodology for calculating coal resources of the Wyodak-Anderson coal zone, Powder River basin, Wyoming and Montana

Compilation of field and laboratory geotechnical test data for U.S. Geological Survey drill holes 1C-79, 2C-80, CW 81-2, and CE 82-1, Beluga resource area, upper Cook Inlet region, Alaska

Contact Info

Product

Resources

About