Coal mine bottom plate water guiding channel identification method based on micro-seismic monitoring

Abstract

The invention discloses a coal mine bottom plate water guiding channel identification method. The method comprises the steps that a micro-seismic monitoring system obtains micro-seismic event locating information and seismic source parameters through monitoring; a water inflow monitoring system monitors the water inflow every day; the forming process and time of a bottom plate water guiding channel are obtained through the rapid increasing of the number of micro-seismic events within a short time on the basis that the water inflow of a working face is increased rapidly; then an energy density cloud picture is made, and the position of the bottom plate water guiding channel on a plane is obtained finally by observing the energy density cloud picture; and at last, the area bottom plate scale height is determined according to the position and geological conditions of the bottom plate water guiding channel on the plane, and therefore the extending depth of the bottom plate water guiding channel is determined. The coal mine bottom plate water guiding channel identification method has high economical value and social significance to widening of the application range of micro-seismic monitoring, reduction of coal mine capital investment and guaranteeing of mine safety production.

Description

technical field [0001] The invention belongs to the technical field of coal mine safety production and mining engineering, and in particular relates to a method for identifying a water guide channel of a coal mine floor based on microseismic monitoring. Background technique [0002] Water source, water quantity and water channel are the three basic elements of coal mine water inrush. field. Before coal seam mining, there are relatively few studies on the detection of potential aqueducts, especially the "static" in-situ research on aqueducts; during coal seam mining, the "dynamic" rupture of aqueducts is unstable Real-time monitoring and research on processes and activation laws are even less. The "static" characteristics of the rock mass and the lack of research on the "dynamic" failure process run through the entire process of coal mine water prevention and control engineering, which is the main reason for the frequent occurrence of water inrush accidents. [0003] At th...

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Problems solved by technology

Obviously, the above method can neither detect potential aqueducts, nor monitor the "dynamic" rupture and instability process and activation law of aqueducts in real time.

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