Application of coal mine roof rating in Chinese coal mines

The coal mine roof rating (CMRR) is a measure of roof quality or structure competency for bedded roof types typically of underground coal mines. The CMRR has been used widely in the US, South Africa, Canada and Australia. In order to investigate the application of the CMRR system in Chinese coal min...

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Bibliographic Details
Published inInternational journal of mining science and technology Vol. 28; no. 3; pp. 491 - 497
Main Authors Wang, Yongyin, Taheri, Abbas, Xu, Xianbi
Format Journal Article
LanguageEnglish
Published Elsevier B.V 01.05.2018
Elsevier
Subjects
Coal mine roof rating
Panjiang coal field
Roof stability
Underground mine
Underground mine
Roof stability
Coal mine roof rating
Panjiang coal field
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Summary:The coal mine roof rating (CMRR) is a measure of roof quality or structure competency for bedded roof types typically of underground coal mines. The CMRR has been used widely in the US, South Africa, Canada and Australia. In order to investigate the application of the CMRR system in Chinese coal mines, two coal mines in China located in Panjiang Coal Field in Guizhou Province were investigated. Field data were collected which is required to calculate the CMRR value based on underground exposure. The CMRR values of 11 locations in two coal mines were calculated. The investigations demonstrated that the chance of mine roof failure is very low if the CMRR value is more than 50, given adequate support is installed in mine. It was found that the CMRR guideline are useful to preliminarily investigate stability in Panjiang Coal Field mines.
ISSN:2095-2686
DOI:10.1016/j.ijmst.2018.04.005