| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 6747762 | International Journal of Mining Science and Technology | 2018 | 7 Pages |
Abstract
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.
Keywords
Related Topics
Physical Sciences and Engineering
Earth and Planetary Sciences
Economic Geology
Authors
Wang Yongyin, Taheri Abbas, Xu Xianbi,