Numerical Simulation Of Electro-Mechanical Coupling Field For Water-Inrush In Working Face

With the extension of mining level and the increase of mining depth, evels of threat to mine water damaging is increasing, prevention and control of water inrush face are much more necessary and urgent. With developing of modern science and technology of mine safety, mine water exploration of some (monitoring) method has been maturing, such as electrical prospecting, exploration and other traditional means of TEM. It is still not have a simple and effective means of geophysical to water-inrush. Using the finite difference method and resistivity to study the CT imaging system face sudden electric hydraulic power coupling field response characteristics, provides a theoretical basis for monitoring of the mine workface. Therefore, this is extremely an important topic of theoretical and practical significance levy.Firstly analysis factor of inrush, have the experiment for loading of rock resistivity variations, experiments show that:loaded rock resistivity with the increase of regular change. Combination of mining damage caused by the formation of the corresponding floor rock mass deformation region to set geometry parameter, combined load of rock resistivity change results to set the floor strata corresponding electrical parameters of the regional deformation, established face sudden hydraulic power coupling model. Use finite difference method to simulate the floor when working face resistivity response characteristics, use resistivity imaging CT for dynamic changes of floor strata resistivity inversion calculation, the results show that:face forward, and suddenly the water before and after the process of deformation of the region with the corresponding bottom face of the advancing, the corresponding changes in resistivity, reduced pressure zone ahead of the resistivity; destruction before the sudden expansion of water resistivity increases, after the sudden sharp drop in water; re-compaction zone resistivity relative to the expansion of the destroyed areas lower resistivity, resistivity decreased after water burst.