摘要
通过制作圆柱型煤煤样并在自主研发的三轴瓦斯渗流系统中进行了一系列实验,模拟瓦斯在煤层中的流动,得出瓦斯在不同围压下的渗流系数。实验中瓦斯的流动近似为一维径向渗流,利用质量守恒定律建立连续性方程,并通过分析找出参数的理想情况与实际情况的对应关系,建立由实验所能测得参数组成的偏微分方程,把渗流系数代入上述方程并在一定条件下解出方程,发现在一维径向渗流情况下,瓦斯压力与渗流距离呈指数关系,即在实际采煤中通过钻孔卸压是较为安全且有效的措施。
As the coal seam between the high-pressure gas and working face was approximately cylindrical in actual coal face,the standard coal briquette specimen（CBS） was made and tested in triaxial gas seepage experiment independent developed to simulate the flow of gas in natural coal seams,so the rate of seepage of CBS could be calculated.The flow of gas in this experiment is approximately one-dimensional radial flow,so the continuity equation was established by conservation law of mass.By analyzing the corresponding relationship between the ideal and the actual situation,the partial differential equation was established by the actual parameters which can be measured through experiment.At last the equation was solved under certain conditions by substituting the seepage coefficient measured.The results show that a exponential relationship between the gas pressure and the distance of gas seepage.Drilling to release pressure in actual coal mining is a more safe and effective method.
出处
《煤炭学报》
EI
CAS
CSCD
北大核心
2011年第2期288-292,共5页
Journal of China Coal Society
基金
国家重点基础研究发展计划(973)项目(2005CB221502)
关键词
标准煤样
瓦斯渗流
连续性方程
偏微分方程
standard coal briquette specimen
gas seepage
continuity equation
partial differential equation
