A self-installing and self-recovering microseismic sensor device

Abstract

A self-installation and self-recovery microseismic sensor device belongs to the technical field of geotechnical engineering. The scheme is as follows: the handle A is connected with the thrust rod, the thrust rod is connected with the connecting plate, the connecting plate is connected with the elastic rod, the elastic rod is connected with several brackets, one end of the bracket is connected with the fixed plate, and the other end is connected with the elastic film; the handle B is connected with the inner center The rod is connected, the inner rod is built in the outer rod, the connecting plate is movably connected with the outer rod built in the thrust rod, the sensor is connected with the connection disk, the inner rod is connected with the elastic probe, and one end of the cable is connected with the sensor The other end is connected to the collection station, the dynamometer is arranged on the inner middle rod, and the thrust rod and the outer middle rod are provided with expansion joints for extending their respective lengths. Beneficial effects: The reinforcement of the anchoring agent is eliminated through the elastic device, and there is no need to waste consumables; the sensor is in close contact with the rock mass, and the monitoring effect is good; when the rock mass is deformed, the bracket of the sensor and the elastic probe will adjust themselves, and there will be no contact. bad phenomenon.

Description

technical field [0001] The invention belongs to the technical field of geotechnical engineering, in particular to a self-installation and self-recovery microseismic sensor device. Background technique [0002] Microseismic monitoring technology is an advanced technology that directly predicts the instability of large-scale engineering rock mass. It can judge the stress state inside the rock mass through the characteristics of rock fracture with acoustic emission, and capture the time, location and time of rock mass micro-fracture. The earthquake magnitude can be used to analyze the local damage location of the rock mass and the potential area of ​​rock burst. In recent years, microseismic monitoring technology has been widely used in engineering practice, such as Hujiahe Coal Mine, Ashele Copper Mine, Hongtoushan Copper Mine, Baihetan Hydropower Station, Jinping II Hydropower Station, and Han-Weihe Diversion Project. [0003] However, before the microseismic monitoring, the...

AI Technical Summary

Problems solved by technology

As the face advances, the sensor needs to be moved forward continuously. Usually, the sensor can only be screwed out by using the installation rod, but it is difficult to remove the sensor because the cement anchor or resin anchor is fixed in the hole, and each sensor is expensive , greatly increasing the cost of microseismic monitoring

Moreover, the construction environment is complicated. Once the sensor has a monitoring problem, it is difficult to repair it. It can only be re-drilled and replaced with a new sensor. This not only wastes time and money, but also affects the quality of monitoring and delays the construction of workers.

[0004] In recent years, there have been some installation devices and methods for microseismic sensors, such as adding a sleeve outside the sensor and fixing it with cement, or using airbags or expansion agents to fix the sensor and then fixing the base with cement, but these methods have not been obtained in engineering. Promotion, there are mainly the following problems: 1. There is no need to get rid of the reinforcement of the anchoring agent, and a lot of consumables are still wasted

2 The construction process is complicated and difficult to operate

3 Airbags, expansion agents, etc. affect the contact between the sensor and the rock mass, thereby affecting the monitoring effect

4 Difficult to overhaul

5 It is difficult to control the coupling between the sensor and the anchoring agent in the hole, and the quality of the monitoring signal will be affected when the contact is poor

6 Affected by construction disturbance, the vibrating sensor and anchoring agent are easily separated

7 When the rock mass where the sensor is installed is deformed, it will also cause anchorage failure

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