论文部分内容阅读
从宏观角度将瓦斯在未卸压煤层中的运移看作是均质中的径向运动来研究瓦斯运移规律,在此基础下通过瓦斯流量、压力公式探讨了几个重要抽放参数的作用,对比提出在未卸压区由于透气性系数变化趋势不大和调整其他参数作用较小的情况下,要提高瓦斯抽采效率,就要合理布置孔间距,即要科学、合理地测量有效抽放半径。同时使用示踪技术来克服传统的测定办法的一些不足,为高效、准确的测量有效抽采半径提供参考。
From the macroscopic view, the gas migration in the unexploded coalbed is regarded as the radial movement in the homogenization to study the gas migration law. Based on this, the gas flow and pressure formulas are used to discuss the influence of several important drainage parameters It is proposed that in order to improve gas drainage efficiency, it is necessary to arrange the spacing of holes reasonably, that is, it is necessary to measure the effective pumping rate scientifically and reasonably in the case of the small unloading area due to the small change of permeability coefficient and the adjustment of other parameters. Put radius. At the same time, tracer technology is used to overcome some shortcomings of traditional measurement methods and provide reference for efficient and accurate measurement of effective drainage radius.