摘要
为了探究破碎泥岩微观结构和渗流参数的实时变化对渗流系统结构稳定性的影响,采用自主研制的破碎岩石三轴渗透试验系统并结合稳态渗透法和轴向位移控制法,对级配破碎泥岩进行三轴渗流试验。结果表明:有效孔隙度、渗透率、非Darcy流β因子的变化均与轴向载荷和围压有密切关系,且得到了渗流失稳时渗透率和非Darcy流β因子之间的关系和发生渗流失稳的主要条件。
In order to explore the influence of real-time change of broken rock microstructure and seepage parameters on structural stability of seepage system,through the application of the self-developed tri-axial penetration test system,the steady penetration method and axial displacement control method,the seepages of the graded broken mudstone are tested on tri-axial basis.The results are as follows:the changes of effective porosity,permeability and non-Darcy flow β factor are closely related to axial load and confining pressure,during the time of the instability of the seepage flow,the relationship between the permeability and the non-Darcy flow β factor is obtained,and the main conditions of the seepage instability are provided.
引文
[1]王志飞,陈占清,孔海陵.煤矸石非Darcy渗流的渗透特性试验研究[J].煤炭技术,2016,35(1):292-294.
[2]姚邦华.破碎岩体变质量流固耦合动力学理论及应用研究[D].徐州:中国矿业大学,2012.
[3]张天军,尚宏波,李树刚,等.分级加载下破碎砂岩渗透特性试验及其稳定性分析[J].煤炭学报,2016,41(5):1 129-1 136.
[4]李顺才,陈占清,缪协兴,等.饱和破碎砂岩随时间变形-渗流特性试验研究[J].采矿与安全工程学报,2011,28(4):542-547.
[5]李顺才,陈占清,缪协兴,等.破碎岩体中气体渗流的非线性动力学研究[J].岩石力学与工程学报,2007,26(7):1 372-1 380.
[6]陈占清,李顺才,浦海,等.采动岩体蠕变与渗流耦合动力学[M].北京:科学出版社,2010.