A kind of mine microseismic detector installed in deep hole

Abstract

The invention discloses a mine microseism wave detector installed in a deep hole. The mine microseism wave detector installed in the deep hole comprises a wave detector sensing unit, a vibration testing unit, a variable gain and controllable filtering module, an azimuthal angle and dip angle measurement module and a core control module with data collection and communication functions. The wave detector can achieve automatic recording of related information, lowers the complexity of artificial operation, avoids introducing more artificial measurement errors, achieves self-measurement of the azimuthal angle and the dip angle, reduces the amount of the related information recorded manually, lightens the workload of manual recording and the probability of wrong recording, and guarantees normal work. A work state self-detection function of the wave detector is added, maintenance difficulty and complexity are lowered, the utilization rate is improved, variable gains and controllable filtering are increased, the grain range and the filtering frequency band are adjustable, the signal-to-noise ratio and the anti-attenuation capacity of a single source are improved, and the wave detector sensing unit is favorable for improving the signal-to-noise ratio of the wave detector array.

Description

technical field [0001] The invention relates to the technical field of mine safety application, in particular to a mine-used microseismic detector installed in a deep hole. Background technique [0002] During mining, after the excavation of the rock mass, the stress balance state of the original rock is destroyed, and the stress in the rock mass is redistributed, resulting in the deformation, movement and destruction of the surrounding rock, causing the rock formation to collapse, which seriously threatens the safety of the mine workers. The entire process of deformation and failure of mine rock mass is almost accompanied by the generation, expansion, and friction of cracks, and the accumulated energy is released during the process of releasing microseismic events. The microseismic events are collected by the geophones (sensors) installed in different positions of the rock mass in the mine microseismic monitoring system, and converted into microseismic signals. By judging t...

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Problems solved by technology

Similarly, there is the complexity of manual operation and the artificial measurement error introduced later, and, because the inner diameter of the installation hole is larger than the outer diameter of the geophone to be installed, the information of the installation hole often cannot truly reflect the true attitude of the geophone after installation (azimuth angle and inclination)

[0011] 2) During the installation process and work engineering of the geophone, the installation attitude (azimuth and inclination angle), installation position (coordinates), data acquisition channel connected to the geophone, and microseismic event data of each geophone need to be carried out one by one. Corresponding records: At the beginning of system installation, when the number of geophones is large, there is a lot of related information that needs to be manually recorded, such as installation attitude (azimuth and inclination angle), installation position (coordinates), data collection of geophone access Channel and other information will increase the burden of manual recording, which will easily lead to wrong recording and cause the microseismic monitoring system to fail to work normally.

In this way, it not only increases the difficulty and complexity of manual maintenance, but also brings hidden dangers to the safety of personnel operation due to the special environment.

[0013] 4) Due to the weak analog signal output by collecting microseismic events during the work of the geophone, it is very susceptible to environmental interference and cannot achieve long-distance transmission. In actual use, the distance between the geophone and the data acquisition station is limited to ensure that the geophone Data reliability: Due to the complexity of the mine development structure and the inability to transmit the geophone data remotely, in many cases, it is necessary to frequently increase the data collection station to ensure the reliable transmission of the geophone data

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