Prediction of surface deformations over longwall panels in the Northern Appalachian coalfield
Advanced Search
Select up to three search categories and corresponding keywords using the fields to the right. Refer to the Help section for more detailed instructions.

Search our Collections & Repository

For very narrow results

When looking for a specific result

Best used for discovery & interchangable words

Recommended to be used in conjunction with other fields

Dates
...

to

...
Document Data
Library
People
Clear All
...
Clear All

For additional assistance using the Custom Query please check out our Help Page

CDC STACKS serves as an archival repository of CDC-published products including scientific findings, journal articles, guidelines, recommendations, or other public health information authored or co-authored by CDC or funded partners. As a repository, CDC STACKS retains documents in their original published format to ensure public access to scientific information.
i

Prediction of surface deformations over longwall panels in the Northern Appalachian coalfield



English
Details You May Also Like

Details:

  • Personal Author:
  • Corporate Authors:
    United States. Bureau of Mines.
  • Description:
    "This paper describes the Bureau of Mines development of a novel subsidence prediction methodology suitable to the mining and geologic conditions in the northern Appalachian coal region. It describes the computation of vertical and horizontal movements, inclination, curvature, and horizontal strains. The substance of this method is the separation of the effects of lithology by introducing a correlation between hypothetically homogeneous overburden and existing lithologic conditions, while providing for different mining conditions such as underground geometry and overburden thickness. The effects of lithology have been expressed in the form of a variable subsidence coefficient within the subsidence trough. The subsidence coefficient is considered a constant for other predictive methods. Field data from 16 test sites at 11 Bureau longwall panel studies were used in the analysis. For each panel, the characteristics of the variability of the subsidence coefficient were defined. Regression analysis of the subsidence coefficients from all test sites on their locations relative to the edges of their respective panels yielded a third- degree polynomial equation. Results from additional longwall panel studies not included in the regression analysis were used to prove the validity of this method. To facilitate the use of this precalculation methodology, a computer program was written in basic for use on a personal computer." - NIOSHTIC-2

    NIOSH no. 10005936

  • Subjects:
  • Series:
    Mining Publications
  • Subseries:
    Report of Investigations
  • Document Type:
    Text
  • Genre:
    Report
  • Place as Subject:
    Appalachian Region ?????
  • CIO:
    National Institute for Occupational Safety and Health (NIOSH)
  • Pages in Document:
    19 numbered pages
  • NIOSHTIC Number:
    10005936
  • Resource Number:
    RI 9142
  • Collection(s):
  • Main Document Checksum:
  • Download URL:
  • File Type:
    Filetype[PDF-960.03 KB]

You May Also Like

Checkout today's featured content at stacks.cdc.gov