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New method of advance geology forecast

A geophysical and geophysical exploration technology, applied in the new field of advanced geological prediction, can solve problems such as economic losses, tunnel safety problems, secondary geological disasters easily induced, and ecological environment problems

Inactive Publication Date: 2019-05-28
刘子卿
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Problems solved by technology

[0002] Among the catastrophic accidents in tunnels at home and abroad, sudden (surge) and mud disasters rank in the forefront in terms of the number of deaths and the number of occurrences, and sudden (surge) disasters have become bottlenecks restricting the construction of tunnels and other underground projects. Tunnel construction has brought serious safety problems and economic losses, and it is very easy to induce secondary geological disasters and ecological environment problems; therefore, the advanced detection of water-bearing geological structures in front of the tunnel face has become an important engineering and technological problem that needs to be studied and solved urgently

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Embodiment Construction

[0004] The present invention is implemented as follows, due to the limitation of the working site in the tunnel and the particularity of the detection purpose (i.e. advanced detection), the working mode of the conventional resistivity method and the IP method cannot be copied to the tunnel advanced detection work; the fixed-point source three The pole method is the main form of advanced detection device in the tunnel. Its specific working method is to arrange the measuring line on the tunnel floor or side wall along the tunnel direction, fix the A pole of the power supply point source at the tunnel face, and place the B pole It is fixed at infinity, and the M pole and N pole of the measuring electrode move along the survey line to collect data. Let the distance between A pole and M pole be AM, and the distance between M pole and N pole be MN; On the basis of the method, a three-dimensional measurement method with multiple measuring lines is designed, and multiple parallel measu...

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Abstract

The invention relates to a new method of advance geology forecast. For a three-dimensional resistivity inversion problem, the amount of observation data is usually smaller than the number of unknown parameters, and due to errors of the observation data and other reasons, a strong correlation usually exists between equations; under the circumstance, the inversion problem is manifested as a mixed determined problem; to solve the problems, prior information needs to be applied into model construction. According to the new method of advance geology forecast, smooth constraint serves as the prior information to be applied into the inversion equation, wherein the smooth constraint means smooth transition of resistivity values of adjacent grids, that is to say, the difference between the resistivities of the adjacent grids is made extremely small, and thus a simplest three-dimensional geophysical model is constructed; the smooth constraint has natural reasonability, because the essential features of the model are maintained; due to application of the smooth constraint, the ill-posedness of the inversion equation is greatly reduced.

Description

technical field [0001] In the present invention, the directionality and space of the detection are different, and the relationship between the IP parameter and the water volume in the surface detection cannot be copied to the advanced detection of the tunnel, and there may not even be a clear correlation between the two, so it needs to be further investigated. To study the relationship between water volume and IP parameters under the condition of advanced detection in the three-dimensional full space of the tunnel; to realize the three-dimensional imaging of the water body and the prediction of the water volume as the core tasks, a special induced polarization instrument for tunnel geological prediction has been developed. Based on the time difference data, the 3D imaging technology for advanced detection of water-bearing structures in tunnels based on the 3D resistivity inversion method was realized, and the water volume prediction method for water-bearing structures based on ...

Claims

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Application Information

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IPC IPC(8): G01V3/02
Inventor 刘子卿其他发明人请求不公开姓名
Owner 刘子卿
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