Effect of the Hydrate Saturation of the Pores of Coal Bed on the Gradient of Gas Pressure and the Rise of Outburst DangerVyacheslav Smirnov, Valery Dyrdin, Tatyana Kim and Andrey ManakovE3S Web Conf., 105 (2019) 01044DOI: https://doi.org/10.1051/e3sconf/201910501044