Transient electromagnetic tunnel advanced prediction method under tunnel boring machine construction condition
A tunnel boring machine, transient electromagnetic technology, applied in the re-radiation of sound waves, electric/magnetic exploration, radio wave measurement systems, etc. and other problems to achieve the effect of stable wave field transformation
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[0035] refer to figure 1 , the invention discloses a transient electromagnetic tunnel advance prediction method under the construction condition of a tunnel boring machine, comprising the following steps:
[0036] Step 1, subtracting the theoretical response of the TBM machine from the collected signal to obtain an over-corrected or under-processed transient electromagnetic attenuation signal, and converting the transient electromagnetic attenuation signal into a virtual wave field signal that meets the requirements of independent component analysis;
[0037] Step 1.1, obtain the theoretical response of the TBM machine
[0038] In this step, first, according to the design drawings of the main models of TBM machines in the market, three-dimensional modeling of the structure of the TBM machine and the material properties of the parts is carried out by means of computer modeling, and the available finite difference in time domain (FDTD) method is generated in the computer. The T...
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