Journal of Mining and Safety Engineering ›› 2021, Vol. 38 ›› Issue (2): 411-418.doi: 10.13545/j.cnki.jmse.2020.0611

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Risk of igniting (exploding) gas from coal wall drill boreholes by coal cutting picks’ friction against quartz sandstone

  

  • Online:2021-03-15 Published:2021-04-06

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