Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Design of Primary Roof Support Systems in US Coal Mines Based on the Analysis of Roof Fall Rates
Each year, about 2,000 falls of supported roof occur in the more than 800 underground U.S. coal mines. Therefore, to help improve the design of primary support systems, the National Institute for Occupational Safety and Health (NIOSH) conducted a nationwide study of roof falls in over 2,500 km of roadways at 37 coal mines. Information on the roof falls, as well as other geotechnical, mining, geologic, and roof bolting factors were collected and quantified. Then a multi-variate statistical analysis was conducted on the data with the roof fall rate being the outcome variable. The results were used to derive preliminary design guidelines for predicting the roof bolt length, capacity, and patter required to effectively reduce the roof fall rate. The equations are fairly limited by a relatively high statistical variance in the data. Also reported is a recent survey of U.S. roof bolt manufacturers that shows a significant change in bolt types used over the last ten years.
Design of Primary Roof Support Systems in US Coal Mines Based on the Analysis of Roof Fall Rates
Each year, about 2,000 falls of supported roof occur in the more than 800 underground U.S. coal mines. Therefore, to help improve the design of primary support systems, the National Institute for Occupational Safety and Health (NIOSH) conducted a nationwide study of roof falls in over 2,500 km of roadways at 37 coal mines. Information on the roof falls, as well as other geotechnical, mining, geologic, and roof bolting factors were collected and quantified. Then a multi-variate statistical analysis was conducted on the data with the roof fall rate being the outcome variable. The results were used to derive preliminary design guidelines for predicting the roof bolt length, capacity, and patter required to effectively reduce the roof fall rate. The equations are fairly limited by a relatively high statistical variance in the data. Also reported is a recent survey of U.S. roof bolt manufacturers that shows a significant change in bolt types used over the last ten years.
Design of Primary Roof Support Systems in US Coal Mines Based on the Analysis of Roof Fall Rates
D. Dolinar (Autor:in) / C. Mark (Autor:in) / G. Molinda (Autor:in)
2005
22 pages
Report
Keine Angabe
Englisch
Resume of roof support methods used in coal mines
| Engineering Index Backfile | 1963
Resume of roof support methods used in coal mines
| Engineering Index Backfile | 1961
Roof Control Strategies for Underground Coal Mines
| NTIS | 1993
High density fill as grouting slurry of roof fall material in coal mines
| Tema Archiv | 2002
Roof bolting in Alabama coal mines and iron-ore mines
| Engineering Index Backfile | 1954