Omnidirectional cataclastic rock mass deep hole installation and recovery device of microseismic unidirectional sensor

Abstract

The invention discloses an omnidirectional cataclastic rock mass deep hole installation and recovery device of a microseismic unidirectional sensor. The omnidirectional cataclastic rock mass deep hole installation and recovery device comprises a sleeve which is embedded in a rock mass drilling hole, wherein a unidirectional sensor fixing device is installed at each part with a preset depth and direction in the sleeve and comprises an intermediate joint which is connected with the sleeve by inner threads, a wedge body combining body which is connected with the intermediate joint and is provided with a wedge body combining body female groove, a wedge body which is adapted to the wedge body combining body female groove, another unidirectional sensor which is connected with the wedge body, a tensile-resisting cable which is connected with the another unidirectional sensor, an elastic pressing device which is fixed on the wedge body combining body, and a pulling type lifting device which is connected with a second leading-out terminal of a cylindrical helical torsional spring of the elastic pressing device and is used for releasing the wedge body, wherein one end of the elastic pressing device tightly presses the wedge body in the wedge body combining body female groove. With the adoption of the omnidirectional cataclastic rock mass deep hole installation and recovery device, the installation is not limited by severe geological conditions and drilling inclined angles, the installation of a vertical hole and an inclined hole in a cataclastic rock mass can be realized, and the unidirectional sensors are easy to recover.

Description

technical field [0001] The invention relates to the field of microseismic monitoring, in particular to a microseismic one-way sensor fragmented rock mass omnidirectional deep hole installation and recovery device, which is suitable for microseismic monitoring. Background technique [0002] Microseismic (microseismic) refers to the microvibration produced by the accumulation of energy in the rock itself in a local area to a certain extent, which induces cracks and destruction inside the rock under external disturbances, and the accumulated energy is released in the form of elastic waves. Microseismic monitoring technology is a new geophysical prospecting technology developed in the 1890s. The principle of this technology is to use sensors to collect vibration signals generated by the internal energy accumulated in the form of stress waves when rock cracks initiate, expand, and slip. , record the process and law of microseismic waveform changes, and obtain data such as the tim...

AI Technical Summary

Problems solved by technology

[0005] At present, in the installation of sensors in engineering applications, whether it is a one-way sensor or a three-way sensor, most of the sensors are buried in the monitoring area as disposable consumables, which cannot be recycled and reused.

Although the monitoring effect of this installation method is better, as the project progresses, the continuous installation of new sensors will inevitably increase the monitoring cost, resulting in a lot of waste, and once the sensor of this installation method has a problem, it cannot be repaired and replaced. , which will affect the monitoring effect; some of them use the method of first fixing the sensor to the bottom of the borehole with a fast-setting colloid, and then recovering it with a reverse thread device (or installing and recovering it through a simple mechanical device). Under the premise of large size and good integrity of the rock, it has a good application, but it becomes almost impossible to recover the deep hole installation of the fractured rock mass, and the safety of the line will also be greatly challenged

[0006] Therefore, for the one-way sensor, under the conditions of relatively large installation depth and relatively broken rock mass, the existing installation methods have the following difficulties: 1) It is difficult to achieve good coupling between the one-way sensor and the hole wall in deep holes; Boreholes in the broken rock mass are prone to collapse, misalignment, and slippage, resulting in sensor cables that are easily damaged and cannot be recovered, and then microseismic signal monitoring; 3) Often only one unidirectional sensor can be installed in one borehole, which is difficult to achieve Full drilling and all-round installation greatly affect the signal reception of microseismic monitoring; 4) One-way sensors are difficult to install and recover in deep holes, and it is difficult to obtain better monitoring results, which in turn affects the accuracy of disaster prediction and forecasting and increased forecast cost

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