Method for measuring residual gas pressure of large area gas drainage

The invention discloses a method for measuring residual gas pressure of large area gas drainage. According to the method, a plurality of positive pressure meters are installed at drilling position ina drilling site to measure the residual gas pressure of a large area, when the measured pressure changes are less than 0.015MPa and all less than 0.74MPa, it is considered that the stable pressure isthe residual gas pressure of a coal seam. The method is simple in construction process, easy to operate, and high in practicality. 本发明公开了一种大区域瓦斯抽采残余瓦斯压力的测定方法，该方法采用多个正压表安装在钻场钻孔位置进行大区域残余瓦斯压力测定，当所测压力变化小鱼0.015MPa且都下雨0.74MPa时，可认为稳定的压力为煤层残余瓦斯压力，本发明施工工序简单，操作方便，实用性强。