Study On Detection Technique Of Water Disaster In Goaf Under Strong Interference Of Pyrite Seam

There is a strong possibility that the coal mined-out area above the 15 th coal seam and pyrite mined-out area under it may filled of water., the conventional detection method may be interferenceed by pyrite, the detection precision and reliability will be reduced, so a scientific research is needed for the above problems,on the basis of the related theory of technology, combined with the experimental results of many exploration technology, This paper presents the solution.Paper using the methods of comprehensive geophysical technology, by studying the geological and tectonic analysis, the Geophysical response characteristics of coal mined-out area and pyrite mined-out area.Selected the first mining face of 15 # coal to be the research object, in view of the electric field characteristics of pyrite layer,Putted forward processing method to eliminate the disturbing of pyrite induced polarization for electromagnetic results. Selected the suitable anti-interference geophysical prospecting instruments to solve the problem that when detecting goaf water, pyrite will produce interference which under 15 # coal seam. To added Cole-Cole model in the forward and inversion process of Transient electromagnetic, it can eliminate the disturbing of pyrite induced polarization for electromagnetic results effectively.The research shows that: through the ground and underground joint detection,and carry on an inversion interpretation into the detection results, greatly enhance the accuracy of the geophysical exploration work, provide technical support for mine after careful detection. On the detection results of the ground and underground transient electromagnetic explorati on, It will be divided the scope of probe into three low resistivity anomaly area.