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随着采煤机割煤速度的增大,直接导致落煤和煤壁的瓦斯涌出、超前支撑压力增大和采空区及邻近层新的煤岩裂隙产生。超前支撑压力的增大使煤壁深部产生新的节理裂隙并使吸附瓦斯向游离瓦斯转化最终涌向工作面,采空区和邻近层新裂隙的产生会使采空区煤岩层中的瓦斯向采空区运移、邻近层的瓦斯涌向工作面。通过分数体积法在工作面合理布置测点,在三维空间内使瓦斯的涌出变化立体化,通过数值分析软件得出采煤机割煤速度与瓦斯涌出之间的关系,指导煤矿生产,为工作面瓦斯的综合治理提供了参考。
With the increase of coal cutting speed, the gas emission from falling coal and coal walls directly leads to the increase of supporting pressure and the new coal and rock fractures in the goaf and adjacent layers. The increase of advance support pressure causes new joints and fissures in the deep coal wall and finally transfers the adsorbed gas to free gas to the working face. The new fissures in the gob area and the adjacent layers will make the gas in the gob of the gob Empty areas move, the adjacent layer of gas flushed face. By means of fractional volume method, the measuring points are arranged on the working face rationally to make the gas emission change three-dimensional in three-dimensional space. The relationship between the coal cutting speed and gas emission is obtained through numerical analysis software to guide the coal mine production, It provides a reference for the comprehensive management of gas in workface.