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Conference Proceedings

The Australasian Ground Control Conference An ISRM Regional Symposium (AusRock Conference) 2022

Conference Proceedings

The Australasian Ground Control Conference An ISRM Regional Symposium (AusRock Conference) 2022

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The coalmine roof rating – an update in its calculation and mechanistically why it works

The Coal Mine Roof Rating (CMRR) is a rock (roof) mass classification (RMC) system/index that was originally developed by the United States Bureau of Mines (USBM) for aspects of underground coalmine geotechnical design and was first introduced to Australia as a part of the original Analysis of Longwall Tailgate Serviceability (ALTS) project conducted in 1997/1998.
Contributor(s): M Colwell
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  • The coalmine roof rating – an update in its calculation and mechanistically why it works
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  • Published: 2022
  • Pages: 18
  • PDF Size: 1.233 Mb.
  • Unique ID: P-02415-S0X5D8

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