Installation structure and installation method of earthquake electromagnetic disturbance sensor

Abstract

The invention provides an installation structure and installation method of an earthquake electromagnetic disturbance sensor. According to the method, a deep well is adopted for installation, an observation well is dug in an observation station, the inclination of the well is smaller than 5 degrees, a totally closed metal or nonmetal magnetic-free casing pipe is adopted, the electromagnetic disturbance sensor is vertically installed at the proper position within 1000 meters of the well depth, a locating base used for supporting the gravity of the electromagnetic disturbance sensor and a horizontal adjusting device used for adjusting the electromagnetic disturbance sensor to keep horizontal are arranged, a swinging ring is fixed to the top of the sensor and used for placing the sensor into the well and fixing the sensor, signals monitored by the sensor are sent to ground equipment through a signal cable, a cement well table is built at a well mouth, and a cement cover is additionally arranged for protection. According to the installation structure and installation method of the earthquake electromagnetic disturbance sensor, the structure is simple, implementation is easy, cost is low, and the floor space is small; interference of a high-voltage power transmission system, a rail transit system, large electric equipment, a metalloid pipeline system and a metalloid pipeline changing a surface electrical property structure, man-made interference and the like can be avoided effectively.

Description

technical field [0001] The invention relates to an installation method of an instrument for monitoring the magnetotelluric field, in particular to an installation structure and an installation method of an earthquake electromagnetic disturbance sensor. Background technique [0002] The installation method of seismic electromagnetic instruments currently used is still the installation method adopted by digital geomagnetic field instruments in the mid-1980s. The horizontal installation method used in this installation method is divided into north-south direction and east-west direction. The observation site requirements are relatively large, and an electromagnetic disturbance sensor is required in each direction to measure the magnetic field change in that direction, and the distance between the two electromagnetic disturbance sensors is relatively long; secondly, the sensor is generally buried about 3 meters deep in the horizontal installation mode. , so the sensor can direct...

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Problems solved by technology

[0002] The installation method of seismic electromagnetic instruments currently used is still the installation method adopted by digital geomagnetic field instruments in the mid-1980s. The horizontal installation method used in this installation method is divided into north-south direction and east-west direction. The observation site requirements are relatively large, and an electromagnetic disturbance sensor is required in each direction to measure the magnetic field change in that direction, and the distance between the two electromagnetic disturbance sensors is relatively long; secondly, the sensor is generally buried about 3 meters deep in the horizontal installation mode. , so the sensor can directly measure the changing magnetic field on the earth's surface, but it cannot directly measure the change of the earth's internal magnetic field; in addition, the biggest shortcoming is that the anti-interference ability is relatively weak, and it is vulnerable to such as ultra-high voltage transmission system, rail transit system, large-scale utility Electrical equipment, metal-like pipeline systems, man-made and metal-like pipeline interference that changes the electrical structure of the surface, etc.

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