Installation structure and installation method of seismic electromagnetic disturbance sensor

Abstract

The invention provides an installation structure and installation method of a seismic electromagnetic disturbance sensor. The method is installed in a deep well, and an observation well is drilled in the observation station. The inclination of the well is less than 5 degrees, and a fully enclosed metal or non-metal non-magnetic casing , the electromagnetic disturbance sensor is vertically installed at a suitable position within a well depth of 1000m. It is provided with a positioning base for supporting the gravity of the magnetic sensor and a horizontal adjustment device for adjusting the magnetic sensor to keep it horizontal. A lifting ring is fixed on the top of the sensor to lower the sensor to The well is fixed, and the signal monitored by the sensor is sent to the ground equipment through the signal cable, and a cement well platform is built at the wellhead and protected by a cement cover. The present invention has simple structure and easy realization, low cost, and small occupied area; it can effectively avoid the interference and man-made effects of high-voltage power transmission systems, rail transit systems, large-scale electrical equipment, metal-like pipeline systems, and metal-like pipelines that change the electrical structure of the ground surface. interference etc.

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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