System and method for acoustic-electric gas real-time automatic monitoring of coal petrography dynamic disasters

Abstract

The invention relates to a system and method for acoustic-electric gas real-time automatic monitoring of coal petrography dynamic disasters and belongs to the field of mine safety and monitoring. The system is composed of a sonic probe, an electromagnetic antenna, a gas sensor, a current sensor, a voltage sensor, an acoustic-electric gas real-time monitor, a communication substation, a substation power supply and a monitoring center machine and the like. The system receives sound waves and electromagnetic radiation and gas signals through the acoustic-electric gas real-time monitor, the voltage sensor can be connected to monitor power cable power-on conditions, and the current sensor is connected to monitor working conditions of an electromechanical device; through abrupt change conditions of the sound waves and electromagnetic radiation and gas signals and acoustic-electric spectrum characteristics, probe and antenna movement and excavation activity conditions are recognized by combination with current and voltage signal changes; and early warning on abnormal areas in front of a working face and coal petrography dynamic disaster danger is performed through effective sound wave and electromagnetic signal changes and combination with gas signal change characteristics. The system can be applied to abnormal area monitoring in front of the working face and coal and gas outburst and rock burst monitoring and early warning.

Description

technical field [0001] The invention relates to the field of mine safety and monitoring, in particular to a system and method for real-time automatic monitoring of sound, electricity and gas for coal-rock dynamic disasters. Background technique [0002] Coal-rock dynamic disasters in coal mines mainly include coal (rock) and gas (methane or carbon dioxide) outburst, coal and gas extrusion, rock burst, etc. With the increase of mining depth and mining intensity, coal-rock dynamic disasters such as mine gas outburst and rock burst have become increasingly serious and complex, and the risk of disasters has increased significantly. At the same time, some mines that had no dynamic disasters or obvious signs are now also Gradually, it seriously threatens the life safety of underground workers and the normal production of mines. [0003] At present, the prediction of coal-rock dynamic disasters in my country can be roughly divided into two categories: static method and dynamic met...

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Problems solved by technology

[0009] In addition, the abnormal area in front of the working face has a great impact on safe and efficient production. It is the main area where coal-rock gas dynamic disasters occur. However, the accuracy of detection and recognition is low for small and less abnormal areas, which has a great impact on mining activities and poor real-time performance. How to use monitoring methods to effectively monitor and identify structures, high stress, coal thickness changes, Changes in the strength of coal and rock mass and abnormal gas occurrence are also issues that need to be resolved urgently

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