advancing mining

Adopting advancing mining which is non-advance bottom gate and raserve gate along the gob.

煤与瓦斯突出，一般多发生在掘进工作面，采用沿空留巷无预掘下顺槽前进式开采方法，杜绝了在原生煤体中的掘进工作，最大限度减少了石门揭煤，充分利用了采场前方的卸压带，达到自我保护的目的。

The advancing mine U-type ventilation is simulated for its leak tendency of gas,oxygen,CO and for the temperature distribution.

基于渗流方程、多组分气体渗流-扩散方程和多孔介质渗流传热方程,建立前进式开采U型通风采空区自然发火模型。

The results show that the probe wipes the material from the advancing side into a rotating and moving zone, and material rotates, advances, and descends helically in the stir zone and rises in the outer part of the rotating zone.

试验结果表明 ,搅拌头首先搅动前进面的材料 ,使它们进入围绕搅拌头旋转和移动的区域 ;旋转区域的材料运动成螺旋状 ,在搅拌头的活动区域 ,材料旋转、前进、下降 ,而在旋转区域之外 ,材料向上运动。