采矿与安全工程学报Issue(3)：421-425,5.
球向流场在被动法瓦斯压力测定中的时间及准确性优势研究
Balance time and accuracy advantage of spherical flow field in gas pressure measurement by passive method
摘要
Abstract
In this paper, the balance time and accuracy of passive method in gas pressure measurement was studied, the research shows that as long as there exits gas exchange face in the measurement pro-cess of passive method, the gas pressure can be measured. Meanwhile, through the calculation of estab-lished model, it is found that the pressure-relief diameter of spherical drilling hole is much smaller than that of the radial drilling hole in the formation process of drilling hole, thus, the gas loss is less. Ac-cording to the limit equilibrium theory, the theoretical balance time is short, and the measured pressure value is slightly higher, that is, the accuracy is high. The calculation validity was verified by numerical simulation. The simulation results also show that as the free emission time increases, the spherical drill-ing hole takes a smaller percentage of the balance time of radial drilling hole, and the advantage of the balance time is more obvious. The field practice proves that the spherical drilling hole has obvious ad-vantage in the balance time and accuracy during the gas pressure measurement process by passive method.关键词
瓦斯压力/球向钻孔/径向钻孔/平衡时间Key words
gas pressure/spherical hole/radial drilling hole/balance time分类
矿业与冶金引用本文复制引用
李晓伟,蒋承林,陈裕佳,唐俊..球向流场在被动法瓦斯压力测定中的时间及准确性优势研究[J].采矿与安全工程学报,2013,(3):421-425,5.基金项目
中国矿业大学青年科技基金项目(2009A004) （2009A004）
