A Method for Magnetic Resonance Advance Detection Using Loop Antenna Rotation

Abstract

The invention relates to a method for magnetic resonance advanced detection with loop antenna rotation. Fix the loop antenna on the rotatable bracket, adopt the measurement method of vertical rotation and horizontal rotation, in the tunnel or mine, detect the water-containing body in front of the tunnel face, the top plate, the bottom plate and the left and right side walls, and obtain the magnetic resonance The signal is used to invert the hydrological parameters to form a two-dimensional water content fan diagram. The one-dimensional magnetic resonance sounding method is extended to the two-dimensional magnetic resonance imaging method, and the rotatable loop antenna is used for multi-angle detection and two-dimensional imaging, which can effectively determine the specific location, scale and water content of the water-bearing body, etc. ; Effectively solves the problem that it is impossible to distinguish which space the water-containing body comes from due to the antenna's full-space radiation. The invention improves the accuracy of magnetic resonance detection, can more accurately reflect the spatial distribution of water-containing bodies near the tunnel face, and reduces the loss of life and property caused by geological disasters such as water inrush and gushing to tunnel and mine construction.

Description

technical field [0001] The invention belongs to the field of advanced detection in the field of geophysical exploration, in particular to a method for magnetic resonance advanced detection by using loop antenna rotation. Background technique [0002] Due to complex geological conditions, geological disasters such as water inrush and gushing occur frequently in underground excavation projects such as tunnels and mines, which have brought huge casualties and economic losses. The advanced detection of water-bearing bodies in front of tunnels and mine shafts has become an important research topic, which is of great significance for formulating water inrush prevention measures and evaluating construction safety. [0003] Magnetic Resonance Sounding (MRS for short) is a direct geophysical prospecting method. Compared with traditional geophysical indirect detection methods, MRS has the advantages of high resolution, high efficiency, rich information and unique interpretation, and ...

AI Technical Summary

Problems solved by technology

[0008] The technical problem to be solved by the present invention is to provide a method for magnetic resonance advanced detection by rotating the loop antenna, which aims to use the rotating loop antenna for multi-angle detection and two-dimensional imaging, and can effectively determine the specific location of the water body. It also effectively solves the problem that it is impossible to distinguish which space the water body comes from due to the full-space radiation of the loop antenna

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