Self-installation and self-recovery micro-seismic sensor device

Abstract

The invention discloses a self-installation and self-recovery micro-seismic sensor device, and belongs to the technical field of geotechnical engineering. According to the device, a handle A is connected with a thrust rod, the thrust rod is connected with a connecting disc, the connecting disc is connected with an elastic rod, the elastic rod is connected with a plurality of supports, one end of each support is connected with a fixing disc, and the other end of each support is connected with an elastic film; a handle B is connected with an inner middle rod, the inner middle rod is arranged in an outer middle rod, the connecting disc is movably connected with the outer middle rod arranged in the thrust rod, a sensor is connected with the connecting disc, the inner middle rod is connected with an elastic probe, one end of a cable is connected with the sensor, the other end of the cable is connected with an acquisition station, and a dynamometer is arranged on the inner middle rod; and telescopic joints for extending the lengths of the thrust rod and the outer middle rod are arranged on the thrust rod and the outer middle rod. The device has the beneficial effects that reinforcement of an anchoring agent is eliminated through an elastic device, and consumables do not need to be wasted; the sensor is tightly contacted with a rock mass, and the monitoring effect is good; when the rock mass deforms, the supports of the sensor and the elastic probe can be automatically adjusted, and the phenomenon of poor contact is avoided.

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 characteristic of acoustic emission of rock fracture, and capture the time, location and magnitude, so as to analyze the local damage location of the rock mass and the potential area of ​​rockburst. 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 Secondary Hydropower Station, Han River to Wei River Project, etc. [0003] However, before the microseismic monitoring, the acceleration sensor of the microseismic monito...

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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