Roof truss contact forces

Stears, J. H. (Juel H.); Serbousek, M. O. (Maynard O.)

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Roof truss contact forces

1988
By Stears, J. H. (Juel H.) ; Serbousek, M. O. (Maynard O.)
Series: Report of investigations (United States. Bureau of Mines) ; 9162

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Personal Author:

Stears, J. H. (Juel H.) ; Serbousek, M. O. (Maynard O.)

Stears, J. H. (Juel H.) ; Serbousek, M. O. (Maynard O.) Less -
Corporate Authors:

United States. Bureau of Mines.
Description:

"Increasing use of birmingham and other roof trusses prompted a Bureau of Mines study of support forces produced on a mine roof by these members. Equations, obtained from laboratory and field tests, are given for calculating the contact forces between the roof strata and a typical truss. Actual contact forces for a specific truss are difficult to estimate because of variable friction loss at the contact points. A finite-element analysis, using typical contact forces, indicated that trusses have a negligible effect on the stress field in massive, competent roof strata. The effectiveness of trusses in supporting broken rock strata was not analyzed. However, experience has shown that trusses are effective in supporting incompetent roof." - NIOSHTIC-2

NIOSH no. 10005994
Subjects:

[+]

Mine Roof Control. Roof Trusses.
Series:

Report of investigations (United States. Bureau of Mines) ; 9162
Document Type:

Report
Collection(s):

Stephen B. Thacker CDC Library collection
Main Document Checksum:

[+]

urn:sha256:2b9afcaea76b191cf2a91349a737846f50c8a23aa90e8e04b69c1e9707bef819
Download URL:

https://stacks.cdc.gov/view/cdc/10688/cdc_10688_DS1.pdf
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Roof truss contact forces

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