Real-time monitoring and prewarning system and method for damage depth of coal seam floor of stope face

Abstract

The invention discloses a real-time monitoring and prewarning system and method for the damage depth of a coal seam floor of a stope face. The system comprises a plurality of drill holes formed in the working face of each connected lane. Distributed strain sensing cables are separately buried in all the drill holes. A plurality of data acquisition substations are arranged in an air return way in a mine. The strain sensing cables in all the connected lanes are connected with the corresponding data acquisition substations separately. The data acquisition substations are connected with one another through cables and then are connected with a multi-channel substation controller through a mining network. A monitoring station is connected with the multi-channel substation controller through a strain acquisition instrument. Strain data of all the drill holes are acquired by the multi-channel substation controller, dynamic acquisition, processing and early warning explaining operation of the strain data volume of the floor rock stratum of the whole region of the working face are conducted in real time, the destructive growth depth of a floor in the working face is monitored in real time through the strain change of a rock stratum, and the water inrush prediction of the floor of the working face is improved.

Description

technical field [0001] The invention relates to the field of early warning systems for damage to coal seam floors, in particular to a real-time monitoring and early warning system and method for damage depth of coal seam bottom floors in mining working faces. Background technique [0002] With the gradual depletion of shallow coal resources, coal mining is tending to develop in depth. At this time, deep mining will face the impact of "three highs and one disturbance", which will make the mining conditions more complicated in shallow areas. When the floor of the mined coal seam is rich in a large amount of limestone confined water, "underpressure" mining will be implemented. At this time, in order to ensure safe and efficient production of the mine, it is necessary to fully grasp the failure law of the floor and accurately determine the depth of the floor mining failure zone. [0003] At present, there are empirical formulas, theoretical calculation formulas, numerical simula...

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Problems solved by technology

[0005] The purpose of the present invention is to provide a real-time monitoring and early warning system and method for the damage depth of the coal seam floor in the mining face, so as to solve the problems that the existing technology is difficult to achieve the effect of continuous dynamic monitoring, continuous observation and disaster early warning.

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