Micro-seismic monitoring three-component sensor

Abstract

The invention discloses a micro-seismic monitoring three-component sensor which comprises a column-shaped sensor base. An axial sensor core, a first radial sensor core and a second radial sensor core are sequentially arranged from one end to the other end of the sensor base, wherein the axial sensor core, the first radial sensor core and the second radial sensor core are all of a column shape and are perpendicular to one another, the center line of the axial sensor core coincides with the center line of the sensor base, the sensor base is arranged in a stainless steel shell, an outer hexagonal installation connector is arranged at one end of the stainless steel shell, a bottom cover is arranged at the other end of the stainless steel shell, a connection threaded hole is formed in the bottom cover, and an anchoring agent container is connected with the bottom cover through a connection stud matched with the connection threaded hole. By means of the micro-seismic monitoring three-component sensor, identification accuracy of arrival time of a P wave and an S wave under the background with high environment noise is improved, identification accuracy of wave arriving first motion is improved, and therefore the identification accuracy of fracture types of rock is improved; locating accuracy and correctness of energy calculation of micro-seismic sources are improved, especially for a micro-seismic signal outside a sensor array.

Description

technical field [0001] The invention belongs to the technical field of acoustic emission / microseismic monitoring, and more specifically relates to a three-component sensor for microseismic monitoring. The invention can be widely used in reservoir water storage, nuclear waste storage, underground storage of greenhouse gases, geothermal engineering, safe operation of open-air slopes, fault orientation in oil and gas exploitation, stability of oil production in oil and gas wells, rockbursts induced by mining, and roof collapse Safety monitoring, evaluation and management of disasters such as land pressure shocks, etc. Background technique [0002] Under the action of external force, during the process of new internal cracks being generated, old cracks expanding and finally destabilized and destroyed, the energy accumulated inside the rock material is released to the surroundings in the form of stress waves, and micro-vibrations are generated. The principle of microseismic tech...

AI Technical Summary

Problems solved by technology

[0005] 1. It is difficult to clearly identify the arrival time of P wave and S wave;

[0006] 2. It is difficult to accurately identify the initial movement of the wave, which affects the identification of rock mass rupture types;

[0007] 3. It is difficult to further improve the accuracy of microseismic source positioning and energy calculation, especially the microseismic signals outside the sensor array

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