煤矿的生产和实践证明，发生在矿井中的动力现象具有分区和成带的特点。
The production and practice of coal mines have proved that the dynamical phenomenon in mines have divisional and zoned characteristics.
马家沟矿煤与瓦斯动力现象严重威胁着该矿的安全生产，掌握其机理意义重大。
To understand the mechanism of coal and gas dynamic phenomenon that seriously threatens the work safety in Majiagou Mine.
通过对22121回风巷煤与瓦斯动力现象分析，总结了这次动力现象的成因。
Through the analysis for the 22121 wind alley coal and gas power phenomenon, have summarized the cause of this time power phenomenon.
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