The Research Of Deep Fluid Seismogenic Environment And Fluid Monitoring Network Layout Techniques

There is a close relationship between the crustal fluid and the occurrence of earthquake. Earthquake science is a comprehensive scientific system,which is mutual influence and interdependence with structural geology and geophysics each other. The development of the underground fluid depends on the construction of the observation network and the observation network is the basis of earthquake monitoring and prediction and disaster reduction.Therefore, it is important to strengthen the study of the subject.In this paper, we chose the main fault zones the southeast of Gansu as the research object. On the basis of the detection of fault gas background values and through the spatial distribution of fault gas concentration intensity, the coupling relationship between regional geology, crustal deformation and seismic activity is mainly studied. Ground by the mechanism of seismogenic model and fluid solid coupling theory, from the weakening to the fault medium and fault creep and triggering earthquake of fluid standpoint,we seek the coupling segment of "fluid and deformation and seismic activity" and the sensitive point of fault gas response to scientific plan a standard fault gas flow observation scheme with a certain physical prediction theory and and build up juvenile related observation network of the study area.This paper puts forward the following key technologies have certain physical prediction ideas of fault gas fluid flow monitoring network layout for earthquake prediction, tracking and prevention and disaster reduction in China in the future.Firstly, The "sensitive points" that are the concentration curves are typical and the peak values are obvious, and the background value are stable. Secondly, the demarcation points and the "weak activity" sections of the fault segment.then, the points of good coupling relationship between fluid activity and crustal deformation and seismic activity. Besides, the points of the fault steep ridge and the trough is clear. In addition,the intersection parts of the fault also should be layed measuring lines. In order to better track and monitor the seismic risk region, according to seismogenic "solid model", the fault gas measurement lines are divided into I, II and III levels.A total of 41 measured lines with a certain physical forecast significance were initially distributed in the southeast region of Gansu, including I grade 33, II grade 7, III grade 1.A total of 16 survey lines were laid in the northern margin fault zone of Western Qinling Mountains, in which the I grade lines 13, II grade 2, III grade 1.Lintan-Tanchang faults was laid out 8 lines, including 6 I grade lines, 2 grade II lines. In Lixian Luo Jiabao fault total of 7 fault gas survey lines were laid, of which 6 I and 1 III level line.In the southern part of Gansu, the fault gas distribution line is 6, of which the I level is 3 and the III level is 3.Through the above-mentioned work, we have initially established the underground fluid flow monitoring network of observation foundation and certain physical mechanism. To a great extent, the observation quality of the precursor monitoring network in the southeast of Gansu is improved, and the spatial resolution is enhanced. It is important to provide technical ideas for the layout of fluid flow monitoring network in the key areas of the national earthquake in the future, And provide an important basis for earthquake prediction, earthquake tracking and earthquake prevention and disaster reduction in china.