摘要
煤层瓦斯压力的测定除了与煤层的原始瓦斯压力、煤层的透气性大小和围岩等自然因素有关外,还与封孔效率、封孔工艺及封孔质量等人为因素有关。文章研究了钻孔形成后到钻孔密封生效这段时间的长短对瓦斯压力快速测定的影响,用有限差分法和FORTRAN对测压钻孔瓦斯流动方程进行数值计算,得出封孔等待时间的长短对快速测压的影响。
In situ measurement of the gas pressure is not only concern with the natural factors,such as original gas pressure and gas permeability of the coal seam,but also with the human factors,such as the time,the proficiency and the quality of the hole-sealing.This essay focuses on the influence on the quick measurement of the gas pressure between the formation of the hole and the effective hole-sealing.
出处
《煤炭技术》
CAS
北大核心
2012年第4期108-111,共4页
Coal Technology
关键词
瓦斯压力
等待时间
封孔
gas pressure
waiting time
hole-sealing
