被保护层综放工作面瓦斯治理技术的研究与应用

Research on and Application of Gas Control Technology of Fully Mechanized Top Coal Caving Face in Protective

随着煤炭开采深度的增加,煤层瓦斯含量越高、瓦斯压力越大,瓦斯含量高、压力大严重制约了采掘工作面的生产,瓦斯成为当今制约回采工作面生产的一大难题,笔者通过对汪家寨煤矿P41104工作面瓦斯涌出来源进行分析,并采取针对瓦斯来源的多种瓦斯治理手段,提高瓦斯抽采浓度及瓦斯抽采量,有效解决了P41104综放工作面上隅角及刮板输送机机尾瓦斯超限制约生产,其中瓦斯体积分数下降幅度高达50%,上隅角及刮板输送机机尾瓦斯体积分数始终保持0.7%~0.9%之间,回风瓦斯体积分数在0.4%~0.6%之间,减低了瓦斯涌出,确保了工作面的安全生产.

With the increase of the depth of coal mining, coal seam gas content is high. The gas pressure increases, and high gas content and pressure restricts the production of working face. Gas has become a major problem restricting the production of working face. Taking the Wangjiazhai Coal Mine P41104 working face of gushing gas source, this paper analyzes it by taking a variety of gas control methods in view of the gas source, and improves the gas drainage concentration and gas drainage quantity, finally effectively solves the P41104 fully mechanized caving working face upper comer gas over limit and scraper conveyor tail about production. The gas volume fraction decreases up to 50%, the upper comer and scraper conveyor tail gas volume fraction is 0.7%-0. 9%, and air return gas volume fraction in 0.4%-0.6%. Thus, the gas emission is reduced, and the safety production is ensured.