It has been proved by the field experiment that the method of rotary radial jetdischarging gas accumulating in upper corner of coalface is really safety, dependable, economical and validly.
试验表明，旋转径向射流可安全、可靠、经济、有效的排放上隅角积聚瓦斯。
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In this paper, the effects of nozzle shape on the properties of high pressure water jetdischarging in air are investigated from theory and experiments.