论文部分内容阅读
通过分析孔口负压、瓦斯流量等参数对钻孔孔内负压分布影响的基础上,得出了抽采钻孔负压沿孔长的动态分布规律,抽采负压沿钻孔长度方向逐渐减少。通过对不同瓦斯流量、不同孔口负压对孔内负压分布的影响研究,得到抽采钻孔负压分布与钻孔长度服从负指数关系;随着钻孔流量的增加,孔内负压损失逐渐升高,两者符合幂指数关系。
Based on the analysis of the influence of pore pressure, gas flow and other parameters on the distribution of negative pressure in borehole, the dynamic distribution law of borehole pressure along bore length is obtained. The negative pressure of pumping along the length of borehole gradually decreases. Through the study on the influence of different gas flow and different orifice negative pressure on the distribution of negative pressure in the hole, the relationship between the negative pressure distribution and the length of borehole obeys the negative exponential relationship is obtained. With the increase of borehole flow, Losses gradually increased, both in line with the power index.