Problem Of Methane-Air Mixture Explosions In Working Faces Of Coal Mines At Mining Intensification And Ways Of Its SolutionSergey Novoselov, Valeriy Popov, Yuriy Filatov, Hee Lee and Anatoliy GolikE3S Web Conf., 21 (2017) 01034DOI: https://doi.org/10.1051/e3sconf/20172101034