为了探究下向孔内水对煤层瓦斯压力测定结果的影响,提出了基于瓦斯压力恢复曲线的富水煤层测压结果的修正方法。通过对测压钻孔周围瓦斯压力和水压力曲线分布的分析,发现测压钻孔内瓦斯压力恢复曲线为双曲线形,水压恢复曲线为直线形。针对不同形态的恢复曲线可以用此法剔除钻孔内水压对测压结果的影响,得出煤层瓦斯压力的真实值。在平煤一矿丁6煤层进行现场应用,并根据朗格缪尔公式反演出的瓦斯压力与修正压力进行对比分析,结果表明两者平均误差为0.08MPa,满足实际使用的精度要求,验证了此方法的可靠性。

In order to study the water in a downward borehole influenced to the measured results of the seam gas pressure, a correction method of the pressure m easured results of watery seam was provided based on gas pressure recovery curve.With the analysis on the gas pressure and water pressure curve distribution around the pressure measured borehole, it was found that the gas pressure recovery curve of the pressure measured borehole was a double curve shape and the water pressu re recovery curve was a straight line shape.According to the different shape recovery curve, the influence of the water in the borehole to the pressure measured results could be removed with the method and a real value of the seam gas pressure could be obtained.A site application was conducted in D6 seam of Pingmei No.1 mine.Acc ording to the Langmuir formula, a comparison analysis was conducted on the inversed gas pressure and corrected pressure.The results showed that the average error of two pressure was 0.08 MPa and could meet the accurate requirements of the actual application. The reliability of the method was verified.

“十一五”国家科技支撑计划资助项目(2006BAK03B01)；河南省杰出人才计划资助项目(084200510002)；