A direct indication method of coal seam igneous rock intrusion position based on spectral decomposition

Abstract

The invention provides a method for directly indicating the intrusion position of coal seam igneous rocks based on spectral decomposition, which belongs to the position indication method of coal seam igneous rocks. The method is as follows: 1) through human-computer interaction, pick the coal seam reflection wave event on the conventional 3D seismic data volume; 2) extract the coal seam reflection wave data along the coal seam reflection wave event to generate sub-data volumes; 3) use the spectral decomposition algorithm, Perform spectral decomposition on the seismic traces in the sub-data volume to obtain the corresponding time-frequency spectrum; 4) for each time-frequency spectrum, search for the maximum response value of each frequency curve, and draw the transaction diagram for the time and frequency corresponding to the maximum response value; 5) Use the linear regression analysis method to fit the scatter points in the intersection graph to obtain the intercept and gradient values; 6) Draw the intercept and gradient values ​​of all seismic traces on the intersection graph to indicate the intrusion position of the igneous rocks. The prediction is true and reliable, the prediction method is scientific and simple, and the prediction result is quantitative, intuitive and high-precision, which meets the requirements of high-yield and efficient recovery of coal seams in coal mining areas.

Description

technical field [0001] The invention relates to a method for indicating the position of coal seam igneous rocks, in particular to a method for directly indicating the intrusion position of coal seam igneous rocks based on spectral decomposition. Background technique [0002] In many coal mining enterprises in my country, there is a serious problem of igneous rock intrusion in the main coal seam. Most of the coal seams are only partially replaced by intrusive igneous rocks, except some coal seams are completely replaced by intrusive igneous rocks. When the intruded igneous rock partially replaces the coal seam, there are three main positions in the coal seam, namely top, bottom and middle. [0003] Because the hardness of igneous rock is much greater than that of coal seam, when mining coal underground, mechanical equipment such as coal cutters are easy to accelerate wear due to cutting igneous rock, and also reduce the efficiency of coal cutting, resulting in greater econom...

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Problems solved by technology

Moreover, the changes of kinematic and dynamic characteristics will be different due to the different intrusion positions of igneous rocks.

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