Mounting cover for microseismic monitoring sensor and installation method of microseismic monitoring sensor

Abstract

The present invention discloses a microseismic monitoring sensor installation cover which comprises a cylindrical shell. One end of the cover body is provided with at least four elastic pieces. Each elastic piece is uniformly distributed around the end part of the cover body to form a horn-shaped section. The other end of the cover body is provided with an end cover with a hole. The steps of installing a sensor by the cooperation of the installation cover and a sleeve and an installation rod comprises the following steps: (1) placing the sensor into the installation cover such that the cable at the tail of the sensor goes out of the hole on the installation cover end cover, (2) allowing the elastic pieces of the installation cover to be in a contracted state and completely placing the installation cover into the sleeve such that the bolt of the head of the sensor is exposed out of a sleeve, (3) sending the sleeve into a drill hole such that the bolt of the head of the sensor is in contact with the bottom of the drill hole, using the installation rod to press the end cover of the installation cover such that bolt of the sensor head is in contact with the bottom of the drill hole and taking the sleeve out, wherein the free ends of the elastic pieces are in contact with the hole wall of the drill hole, under the elastic effect of the elastic pieces, the installation cover and the sensor are fixed into the drill hole, and the installation rod is taken out to complete the installation.

Description

technical field [0001] The invention belongs to the field of geotechnical engineering, and in particular relates to a microseismic monitoring sensor installation cover and a microseismic monitoring sensor installation method. Background technique [0002] After the rock mass is excited by the external disturbance stress, a local elastic-plastic concentration phenomenon will occur inside it. When the energy accumulates to a certain critical value, it will cause the generation and expansion of micro-cracks in the rock mass. The generation and expansion of micro-cracks are accompanied by With the release of elastic or stress waves and rapid propagation in the surrounding rock mass, such elastic waves are called microseisms in geology. Microseismic monitoring technology is a technology that records the shock waves released by rock rupture through multiple sensors arranged in the rock mass area, and evaluates and studies the spatio-temporal evolution law of surrounding rock damag...

AI Technical Summary

Problems solved by technology

Although this method can reduce the interference of microseismic monitoring on the construction site and avoid sensor damage to the greatest extent, this method still has the following disadvantages: (1) The debris and dust remaining on the wall of the borehole or the bottom of the borehole are easy to cause damage to the sensor. The bonding between the sensor and the original rock is not stable. During the microseismic monitoring process, some sensors may fall off due to the impact of on-site construction vibration; The overflow of the water body causes the sensor to be in a humid environment, and the humid environment is likely to cause the anchoring agent to fail, which in turn causes the sensor to fall off

The falling off of the sensor will cause the distortion of the monitoring data and affect the accuracy of the microseismic monitoring; (3) Since the sensor or the shell equipped with the sensor is bonded to the original rock at the bottom of the hole, it is necessary to use external force to make it compatible with the sensor when recovering it. The original rock at the bottom of the hole is detached, which is not only inconvenient to operate, but also time-consuming and laborious; and the recovery of the sensor by external force is easy to cause the sensor to break. When the sensor is directly bonded to the original rock at the bottom of the hole, this problem is particularly prominent, and sometimes the sensor cannot be recovered. , and the sensor is damaged during the recovery process or the sensor cannot be recovered, it will cause a large economic loss, resulting in high cost of microseismic monitoring

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