Vibration monitoring system and method of deep rock mass based on acceleration sensor steel pipe

Abstract

The invention discloses a deep rock mass vibration monitoring system based on an acceleration sensor steel pipe. The deep rock mass vibration monitoring system comprises an acceleration sensor steel pipe, a charge amplifier, a data collector and a computer which are sequentially connected, wherein a three-way acceleration sensor is fixed in the acceleration sensor steel pipe; the three-way acceleration sensor is connected with the charge amplifier through an armored low-noise cable; the charge amplifier is connected with the data collector through a shielded cable; the three-way acceleration sensor receives the original vibration signals, and the original vibration signals are transmitted by the armored low-noise cable to the charge amplifier and amplified; voltage signals are transmittedto the data collector by the shielded cable; and the data collector transmits the received signals to the computer. The deep rock mass vibration monitoring system based on the acceleration sensor steel pipe provided by the invention can effectively monitor vibration acceleration signals of a deep rock mass, and realize monitoring of deep rock mass damage and real-time inversion of an underground structure.

Description

technical field [0001] The invention relates to the technical field of deep rock mass safety monitoring, in particular to a deep rock mass vibration monitoring system based on an acceleration sensor steel pipe and a method thereof. Background technique [0002] Rock mass vibrations are produced by rock fractures or fluid disturbances. In a broad sense, rock mass vibration can be divided into engineering production vibration and natural rockburst, earthquake, etc. Vibration in engineering production is caused by rock rupture during artificial production and construction, such as tunnel blasting excavation, mine safety production, etc. Naturally occurring rock mass vibrations are caused by changes in the natural stress field that cause rocks to rupture, resulting in changes in pore pressure, such as rockbursts and earthquakes. [0003] A large number of large-scale water conservancy and hydropower projects have been or will be constructed in areas with high seismic intensity...

AI Technical Summary

Problems solved by technology

At present, my country's vibration research is still in its infancy. Most of the vibration monitoring systems in major oilfields and mines are imported from abroad and usually only perform source location and magnitude statistics and distribution maps. There are few further studies using vibration signals to invert real-time underground structures for engineering. Production provides more reliable evidence, and usually the inverted structure reflects the state of the underground structure in a certain period of time in the past, but cannot reflect the current underground structure, which greatly affects the effectiveness of vibration monitoring

[0005] At present, the methods used to monitor deep rock formation activities at home and abroad often include the general mine pressure method, geophysical method and drilling method to measure the deformation, displacement, pressure and stress of the rock formation, but the test level and accuracy are not high.

With the blasting and excavation of the chamber, due to the influence of geological conditions, section size, construction technology and other factors, the occurrence of micro-cracks and rockbursts in the deep rock mass will easily lead to an increase in support costs and damage to equipment. , and even the occurrence of problems such as the collapse of the chamber

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