论文部分内容阅读
基于稳态气体渗流理论推导了岩石渗透率原位测量公式,基于巴甫洛夫斯基雷诺数公式给出了工程中达西渗流的粗略判断方法,研制了一套由气源子系统、气体质量流量控制子系统、封孔子系统、气体压力测量子系统组成的岩石渗透率原位测量系统,介绍了各子系统的组件及功能,给出了测量步骤和流程,形成了基于钻孔充气试验测量岩石原位渗透率的完整方法,在某场地花岗岩介质中开展了原位钻孔充气试验,得到了现场钻孔的原位渗透率数据,并对试验中的钻孔压力历程、达西渗流判断、充气流量影响、胶塞膨胀压力影响、测量结果代表范围等关键环节进行了深入分析。试验结果表明该系统稳定性好,测量结果合理且代表范围大,能够应用于岩石渗透率的原位测量中。
Based on the theory of steady state gas seepage, the in-situ measurement formula of rock permeability is deduced. Based on Pavlovsky’s Reynolds number formula, a rough judgment method of Darcy flow in the project is given. A set of gas- Mass flow control subsystem, sealing hole subsystem, gas pressure measurement subsystem composed of rock permeability in situ measurement system, introduced the components and functions of each subsystem, gives the measurement steps and processes, formed based on the borehole inflation test A complete method for measuring in-situ permeability of rock was developed. In-situ drilling inflation test was carried out in a granite medium at a site. The in-situ permeability data of the borehole were obtained. The drilling pressure history, Darcy seepage Judgments, the impact of inflatable flow, the impact of expansion pressure rubber stopper, measuring the representative of the scope of the key aspects of an in-depth analysis. Experimental results show that the system has good stability, reasonable measurement results and large representative range, and can be applied to in situ measurement of rock permeability.