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Coal mine subsidence and land use in the Boulder-weld coalfield, Colorado.

Authors
Myers-AR; Hansen-JB; Lindvall-RA; Et Al
Source
For Reference Only At Bureau Libraries 1975; :1-92
Link
NIOSHTIC No.
10000934
Abstract
The purpose of this study is to define the extent of mining as accurately as possible, commensurate with the scale of the final maps, and to define the physical factors controlling subsidence. Such factors include the extent of pillar removal, the thickness of extracted coal, the depth of cover above mine workings and the times of mine operations. The scope of this study is confined primarily to a review of existing data, a limited amount of field work, and the preparation of this report. Maps, tables, and photographs illustrating the findings of the study are presented. Techniques such as low-sun-angle photography and aerial photo interpretation have been examined as possible tools to be used in subsidence studies. The most important product of this study is a subsidence hazard map which shows the degree of subsidence severity that can be expected over the various undermined areas. State and local planners and land developers will find this map particularly useful in making initial judgments about the feasibility of projects whithin the coalfield.
Publication Date
19750101
Document Type
CP; Final Contract Report
Fiscal Year
1975
NTIS Accession No.
NTIS Price
Identifying No.
OFR 64-77
NIOSH Division
DRC
Source Name
For Reference Only At Bureau Libraries
State
CO
Performing Organization
Colorado Geological Survey
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