瓦斯抽采钻孔合理布置方式研究

Reasonable layout gas extraction drill empty research

依据瓦斯在煤层中的赋存规律和流动规律,利用Comsol Multiphysics软件对不同布孔方式、不同抽采时间下的瓦斯抽采影响半径进行了数值模拟,得知抽采10~150d后,单排布孔方式下相邻钻孔耦合抽采影响半径比单孔增加16.14%~18.37%;三花眼布孔方式下相邻钻孔耦合抽采影响半径比单孔增加17.97%~20.42%。提出了矿井下预抽煤层瓦斯合理的布孔方式。

based on the gas in the coal seam occurrence rule and flow rule, using Comsol Multiphysics software with different hole arrangement, the gas under different extraction time, extraction effect radius are simulated, learned that after extraction from 10 - 150 d, adjacent borehole coupling extraction from single hole arrangement mode radius of influence than puckering increased by 16.14% - 18.37%;Three presbyopia holes arrangement manner adjacent borehole coupling extraction radius of influence than puckering increased by 17.97 % -20.42%.Proposed under the mine drainage of coal seam gas in reasonable way of holes.