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为了研究工作面瓦斯涌出的变化规律 ,在顿巴斯扎夏吉科矿考察了回采面推进速度对回采面和采区瓦斯涌出的影响。考察表明 ,随着回采面推进速度的加快 ,采区和回采面绝对瓦斯涌出量呈阶段性下降。发生阶段性下降的回采面推进速度值叫做临界推进速度值。回采面推进速度约等于临界
In order to study the variation rule of gas emission from working face, the influence of the advancing speed of mining face on gas emission from mining face and mining area was investigated in Xiaji Zha Kebo mine in Donbasza. The inspection showed that with the acceleration of the recovery face, the absolute gas emission from the mining area and the mining face decreased in a phased manner. The step-down mining face pushing speed value is called the critical pushing speed value. The mining face to promote speed is equal to the critical