Detection Technology And Application Of Underground Magnetic Fluid

As a vital part of water source, groundwater resources play an important role in human's manufacture and life , as well as the development of national economy. With the shortage of water source being more and more serious, people have reached consensus to take effective measures to prevent groundwater from pollution and overexploitation; Hence, rational exploitation and the use of groundwater resources are the main subject at present.Water source exploration is an significantly fundamental engineering in economic construction. The geophysical method is used to find the solid minerals, and applying it to the detection of groundwater is a conventional method. The detected data value is reflected in the physical properties of the integrated geological value, but the determination of the specific kinds of solid mineral or groundwater under the ground that expressed by this physical variable is closely related to the interpreter's subjective experience, as a result, there are multiple solutions of detection result , which lead a low exploration success rate. The method of underground magnetic fluid detection, a geophysical method that detects the electromagnetic response information of underground magnetic fluid in the natural electric field, is introduced in this thesis to help detect groundwater.According to this method, the dynamic information of the groundwater or fracture is extracted from the information collected before. Then the distribution of groundwater or fracture can be analyzed qualitatively and quantitatively depending on the information.Through theoretical analysis, instrument design and field test, the technology about underground magnetic fluid detection method is researched in the thesis. The peper mainly includes the following content:1. Studies of underground magnetic fluid's basic theory. Firstly, the definition and origin of underground magnetic fluid are introduced, then followed the transmission properties of it. This part is the foundation and basis of underground magnetic fluid's detection method.2. Extraction method of characteristic information in underground magnetic fluid. The main content of this chapter is the modeling of underground magnetic fluid signal; Then the detection technology of groundwater and fracture, the extraction method of characteristic information are studied. 3. The overall scheme design of detection instrument. In this part,the hardware circuit design and the detection software design of that were introduced briefly.4. Field testing. With a large number of experiments and summaries at Xiangtan Jinding Building Materials Manufacturing Corporation's wells investigation and goaf detection of Fengpeng, Shaodong, it verified that applying the underground magnetic fluid's detection method can detect reliably the run-off channel of the ground water, fracture and so on.The innovative point of this paper lies in the finding of geophysical method which distinguishes groundwater resources from solid mineral resources effectively. It is verified feasible and effective from angels of theory and field test respective. The research provide important theoretical and practical significances to the development of underground geophysical method field in future.