High-density Electrical Damage In The Coal Seam Floor In The Application Of The Law

The threat of China's coal mining by the bottom water is very prominent. Therefore it is great significant to adopt a rational and effective way to detect coal seam floor depth of the damage and destruction of the law, to mine water. As a kind of electrical exploration in the coal mine high density electrical method has a broad application prospects. High density resistivity method in coal mine in the application of the law of floor damage. is studied in this paper.First, determine the detection method. By analyzing the failure mechanism of coal seam floor, the undermining factors and the comparison of coal seam floor detection method, high-density electrical method for direct detection is identified. And the high-density electrical field distribution of mine detection characteristics, influence factors, interference detection solutions, and high-density electrical method the basic principles and working methods are is introduced.Second, the physical modeling experiments. Through the creation of physical models, using high-density electrical method coal seam floor cracks and under different pressures apparent resistivity are simulated. Using mathematical statistical methods, dead pixels on the experimental data are eliminated, and smooth handling. Then they are converted into the format required for the corresponding maps. Then RES2DINV high-density inversion software and SURFER software are used to inversed to study Simulated coal seam floor cracks and under conditions of different pressure distribution of apparent resistivity. When detect simulated under different pressure condition of the distribution of apparent resistivity, in order to reflect the different pressures under conditions of apparent resistivity it needs extraction analysis. Extract under the same vertical position of the different pressures at different depths and with a layer of bits of apparent resistivity at different locations, with polynomial fitting. Find pressure and draw the correlation between apparent resistivity.Finally, the field test. Through physical simulation test data analysis and study, select the suitable coal face to carry out underground exploration on the ground, Smooth the data processing, inverse, and extraction analysis. Research the different sections of apparent resistivity to promote the distribution of characteristics, to find out the mining laws of mining the depth and bottom face of the destruction of rocks in mining before mining,after the destruction. Analysis to determine such as the relationship between the depth and mining damaged floor surface width of the stope location factors. Distribute the model of the relationship between the apparent resistivity and destruction of the establishment of floor patterns...