Roof truss contact forces

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

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

Advanced Search
Custom Query

All these words:

For very narrow results

This exact word or phrase:

When looking for a specific result

Any of these words:

Best used for discovery & interchangable words

None of these words:

Recommended to be used in conjunction with other fields

Language:

Dates

Publication Date Range:

to

Document Data

Title:

Document Type:

Library

Collection:

Series:

People

Author:

Clear All

Query Builder

Query box

Clear All

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

i

Roof truss contact forces

1988
By Stears, J. H. (Juel H.) ; Serbousek, M. O. (Maynard O.)
Series: Mining Publications

[PDF-8.38 MB]

Select the Download button to view the document

This document is over 5mb in size and cannot be previewed

English

Details You May Also Like

Details:

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:

Mining Publications
Subseries:

Report of Investigations
Document Type:

Text
Genre:

Report
CIO:

National Institute for Occupational Safety and Health (NIOSH)
Pages in Document:

ii, 20 numbered pages
NIOSHTIC Number:

10005994
Resource Number:

RI 9162
Collection(s):

National Institute for Occupational Safety and Health
Main Document Checksum:

[+]

urn:sha-512:68040c2ce41fb8b2e72d4714650b9e09c37617f22e503aeff24c5d28ca6c00b34a8dbe1e2e46a022d6a5db4a8b176d37518004dc17aca9137e1f5bfd0a829946
Download URL:

https://stacks.cdc.gov/view/cdc/10688/cdc_10688_DS1.pdf
File Type:

No Additional Files

More +

Roof truss contact forces

Details:

Supporting Files

You May Also Like