Effect Of The Dip And Excavation Orientation On  Roof Stability In Moderately Dipping Stone Mine Workings

Esterhuizen, G. S.; Iannacchione, A.T.

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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.

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Effect Of The Dip And Excavation Orientation On Roof Stability In Moderately Dipping Stone Mine Workings

2005
By Esterhuizen, G. S. ; Iannacchione, A.T.
Source: Alaska Rocks 2005, Proceedings of the 40th U.S. Rock Mechanics Symposium, Anchorage, Alaska, June 25-29, 2005. Alexandria, VA: American Rock Mechanics Association, Paper No. ARMA/USRMS 05-743, 2005 Jun; :1-8

English

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Details:

Personal Author:

Esterhuizen, G. S. ; Iannacchione, A.T.

Esterhuizen, G. S. ; Iannacchione, A.T. Less -
Corporate Authors:

Pittsburgh Reserch Labortory (National Institute for Occupational Safety and Health)
Conference Authors:

U.S. Rock Mechanics Symposium (40th : 2005 June 25-29 : Anchorage, Alaska)
Description:

Underground limestone mines typically use the room-and-pillar method of mining in the generally flat-lying limestone formations. In some cases the dip may exceed 5° which can result in unique roof instability problems. Stability may be further exacerbated by the presence of horizontal tectonic stresses. Field studies and numerical model analyses are combined to assess the affect of the dip in various stress conditions. The results showed that where the horizontal tectonic stresses are sufficient to cause intact rock failure, increasing dip results in increased failure potential. The effect of the dip is greater when the maximum horizontal stress is parallel to the dip. Two case studies are presented and evaluated against the findings of stress analysis results. The study showed that the empirical rules of orienting headings parallel to the maximum stress are generally applicable to dipping excavations, except when mining in the up-dip direction. The importance of accurately determining the orientation of the maximum horizontal stress is emphasized because the window of favorable orientations relative to the stress is small.
Subjects:

[+]

Mining
Source:

Alaska Rocks 2005, Proceedings of the 40th U.S. Rock Mechanics Symposium, Anchorage, Alaska, June 25-29, 2005. Alexandria, VA: American Rock Mechanics Association, Paper No. ARMA/USRMS 05-743, 2005 Jun; :1-8
Document Type:

Book Chapter
Genre:

Conference Publications
Collection(s):

National Institute for Occupational Safety and Health
Main Document Checksum:

[+]

urn:sha-512:297620551f10a19ff0469c1cc82102eb2a96729df2002cb11da64db18b9a7c58baccc7332fd4df7beac75c7fa2a9c58abd52a06004161b69f3b68e375d8fa33b
Download URL:

https://stacks.cdc.gov/view/cdc/8737/cdc_8737_DS1.pdf
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[PDF-1007.41 KB]