Tunnel microearthquake monitoring sensor arrangement and data collecting instrument connecting method

Abstract

The invention discloses a tunnel microearthquake monitoring sensor arrangement and data collecting instrument connecting method, which comprises the following steps that a first group of sensors are arranged at a full cross section with a certain distance from the back side of a tunnel face, a first three-way microearthquake sensor and first to third one-way microearthquake sensors are distributed behind the tunnel face along the axial line of a tunnel in a staggered way; a second group of sensors are arranged at the full cross section with a certain distance from the back side of the tunnel face, and a fourth one-way microearthquake sensor, a second three-way microearthquake sensor and fifth to sixth one-way microearthquake sensors are distributed behind the tunnel face along the axial line of the tunnel in the staggered way. A first microearthquake data collecting instrument is connected with the first three-way microearthquake sensors and the fourth, second and fifth one-way microearthquake sensors, and a second microearthquake data collecting instrument is connected with the rest four microearthquake sensors. The method provided by the invention has the advantages that the microearthquake source positioning can be favorably realized, the tunnel microearthquake monitoring effect is improved, and when a small number of microearthquake sensors or data collecting instruments and lines thereof generate faults and cannot work, the integral high efficiency of a microearthquake monitoring network cannot be influenced.

Description

technical field [0001] The invention relates to the technical field of tunnel microseismic monitoring, and more particularly relates to the arrangement of tunnel microseismic monitoring sensors and a connection method with a data acquisition instrument, which is suitable for tunnel microseismic monitoring of water conservancy, hydropower, transportation, etc. Background technique [0002] The basic principle of microseismic monitoring technology is to use the microseismic monitoring sensors arranged in different directions in space to obtain the seismic wave information emitted by the micro-fracture process of the rock mass, analyze and process it to determine the time, location, size and location of the microseismic event. Energy release and other information can be used as a basis to infer the internal stress state and damage of the rock mass, and then analyze and predict the stability of the rock mass. The arrangement of microseismic monitoring sensors directly affects th...

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Problems solved by technology

[0005] The object of the present invention is to aim at the above-mentioned defects existing in the prior art, to provide a tunnel microseismic monitoring sensor arrangement and a connection method with a data acquisition instrument, to improve the acquisition ability of microseismic signals for microseismic monitoring and the positioning accuracy of microseismic sources, and to solve the problem of partial microseismic When the sensor, microseismic data acquisition instrument or its line is damaged, the microseismic monitoring system has weak signal acquisition ability or even fails to ensure the effect and continuity of the microseismic monitoring system signal acquisition

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