Stope micro-earthquake continuous monitoring intelligent early-warning instrument and early-warning method thereof

Abstract

The invention discloses a stope micro-earthquake continuous monitoring intelligent early-warning instrument, which is characterized in that a micro-earthquake sensor sensing and collecting device is arranged at a stope access or in an adjacent drift roadway so as to monitor stope rock mass micro-fracture signals and collect the micro-earthquake time, the micro-earthquake frequency, the micro-earthquake energy, the micro-earthquake magnitude and the micro-earthquake location; a micro-earthquake signal processing system analyzes the collected data so as to carry out judgment on the stability state of stope rock mass and carry out recognition on a potential rock mass collapse hidden danger location of the stope; and an early-warning device carries out sound-light signal early warning on the stability of the stope rock mass. The stope micro-earthquake continuous monitoring intelligent early-warning instrument can perform monitoring on the stope rock mass stability, and carries out early warning on potential safety hazards such as roof collapse, wall caving and rock burst in a stope personnel operation area. Workers are enabled to check and process rock mass collapse hidden dangers in the stope personnel operating area timely, and safety accidents such as roof collapse, wall caving and rock burst can be effectively controlled and reduced.

Description

technical field [0001] The invention relates to an instrument for monitoring and early warning of rock mass stability in a stope, in particular to an intelligent early warning instrument for continuous microseismic monitoring in a stope and an early warning method thereof. Background technique [0002] The use of microseismic monitoring systems to monitor the stability of mine rock mass has become an important part of mine safety management. Deep mines in South Africa, the United States, Poland, Canada, China, Russia and Australia have been equipped with microseismic monitoring systems to monitor rock mass. Effectively control and reduce mine power accidents such as rock bursts and mine earthquakes. Effective progress has been made in the development of monitoring instruments and data analysis, but there are still some problems that have not been well resolved so far: (1) The monitoring host or service system is usually installed on the surface, and the line layout must be c...

AI Technical Summary

Problems solved by technology

Effective progress has been made in the development of monitoring instruments and data analysis, but there are still some problems that have not been well resolved so far: (1) The monitoring host or service system is usually installed on the surface, and the line layout must be connected from the surface to the deep In the past, the cost is high, the line maintenance is difficult, the sensors and the acquisition instruments are mostly fixed, and it is inconvenient to move; (2) The waveform monitoring information cannot be processed automatically, and the picking accuracy of the first arrival of the P wave often fails to meet the engineering requirements; The first arrival time refers to the time when the longitudinal wave emitted by the source vibration reaches the sensor. Since the P wave travels faster than the S wave, the P wave and the S wave are easy to distinguish graphically during long-distance transmission. The S wave is superimposed on the waveform and is difficult to distinguish from the P wave coda. In engineering, the easily identifiable P wave is generally selected for marking the first arrival.

Picking the first arrival of microseismic P waves is a key link in source location, which provides parameters for source location, and its accuracy directly affects the accuracy of source location; (3) The location error is large, and the actual situation of the stope is complex and changeable, and it is generally arranged continuously. It is easy to mistakenly locate the adjacent stope, and it is difficult to effectively locate the specific location inside the stope; (4) It is difficult to realize the monitoring and real-time early warning of potential safety hazards such as roof fall, slab, rockburst, etc. in the working area of ​​the stope personnel