Longwall gate road stability in a steeply pitching thick coal seam with a weak roof

Barron, Lance R.; DeMarco, Matthew J.

Back to Previous Page

- Add this to...
- Twitter
- Facebook
- Google Bookmarks
- LinkedIn

Longwall gate road stability in a steeply pitching thick coal seam with a weak roof

Published Date:

1995

Series:

Report of investigations (United States. Bureau of Mines) ; 9580

Language:

English

[PDF-6.17 MB]

This document cannot be previewed automatically as it exceeds 5 MB

Please click the thumbnail image to view the document.

Longwall gate road stability in a steeply pitching thick coal seam with a weak roof

Details:

Personal Authors:

Barron, Lance R. ; DeMarco, Matthew J. ;

Corporate Authors:

United States. Bureau of Mines. . Eastern Associated Coal Corp. .

Keywords:

[+]

Description:

"The U.S. Bureau of Mines conducted a ground pressure analysis of a wide abutment-type chain pillar in a two-entry gate road of a Western U.S. coal mine with an extremely weak immediate roof. This report discusses gate road layout and performance and secondary support effectiveness. The results of the pillar pressure study are compared to pillar loading predicted by a widely used pillar design method and to similar studies in other mines. A stability evaluation of the most recent longwall headgate, using the USBM Analysis of Longwall Pillar Stability (ALPS) indicates marginal stability in first-panel mining and instability in second-panel mining. ALPS and the USBM Coal Mine Roof Rating (CMRR) system are used to evaluate tailgate-mining stability of the previous gate roads and to determine pillar and entry width and top coal thickness criteria for tailgate stability in future panels." - NIOSHTIC-2

NIOSHTIC no. 10005898

Document Type:

Report

Collection(s):

National Institute for Occupational Safety and Health

Supporting Files:

No Additional Files

No Related Documents.

You May Also Like:

Proceedings : mechanics and mitigation of violent failure in coal and hard-rock mines

Personal Author:

Maleki, Hamid N.

Corporate Author:

United States. Bureau of Mines.

Published:

May 1995

Series:

Special publication (United States. Bureau of Mines) ; SP 95-01

Description:

Papers presented at a U.S. Bureau of Mines (USBM) technology transfer seminar describe the causes of violent material failure in U.S. mines, measurement techniques for monitoring events that result in violent failure, and mitigation techniques for co...

File Type:

[PDF - 23.73 MB]
Proceedings of the Second International Workshop on Coal Pillar Mechanics and Design

Personal Author:

Heasley, Keith A.; Iannacchione, Anthony T.; Mark, Christopher; Tuchman, Robert J.;

Corporate Author:

Pittsburgh Research Laboratory (National Institute for Occupational Safety and Health)

Conference Author:

International Workshop on Coal Pillar Mechanics and Design 1999 : Vail, CO)

Published:

June 1999

Series:

Information circular (National Institute for Occuptional Safety and Health) ; 9448
DHHS publication ; no. (NIOSH) 99-114

Description:

"Pillar design is the first line of defense against rock falls--the greatest single safety hazard faced by underground coal miners in the United States and abroad. To help advance the state of the art in this fundamental mining science, the National ...

File Type:

[PDF - 662.14 KB]
Proceedings : new technology for ground control in multiple-seam mining

Personal Author:

Mark, Christopher; Tuchman, Robert J.;

Corporate Author:

Pittsburgh Research Laboratory (National Institute for Occupational Safety and Health)

Published:

May 2007

Series:

Information circular (National Institute for Occupational Safety and Health) ; IC 9495
DHHS publication ; no. (NIOSH) 2007-110

Description:

"Multiple-seam interactions are a major ground control hazard in many U.S. underground coal mines. In some U.S. coalfields, particularly in central Appalachia and the West, the majority of today's mines are operating above and/or beneath previously m...

File Type:

[PDF - 8.00 MB]
Using the Coal Mine Roof Rating (CMRR) to Assess Roof Stability in U.S. Coal Mines

Personal Author:

Molinda, Gregory M.; Mark, Christopher, Dr.; Debasis, D., Dr.;

Published:

0/1/1900

Description:

The stability of any underground opening is, in large part, a function of the strength of the rock mass which surrounds it. The Coal Mine Roof Rating (CMRR) has been developed to quantify the defects in the rock mass and compile a strength value whic...

File Type:

[PDF - 1.18 MB]
Developments In Coal Pillar Design At Smoky River Coal Ltd., Alberta, Canada; Proceedings Of The Second International Workshop On Coal Pillar Mechanics And Design

Personal Author:

Cain, Peter. PH.D.

Published:

5/1/1999

Description:

Smoky River Coal Ltd. mines low-volatile metallurgical coal by surface and underground methods in the foothills of the Rocky Mountains of Alberta, Canada. Current underground operations are confined to the 5B-4 Mine. Development of 5B-4 began in Janu...

File Type:

[PDF - 101.06 KB]