Working face deep concealed water-conducting channel exploration method

Abstract

The invention provides a working face deep concealed water-conducting channel exploration method. The method comprises the steps that microearthquake detectors are arranged in the upper and lower crossheading roadways of the working face, and a microearthquake monitoring system is constructed; a microearthquake accident is induced to happen before mining of the working face, the spatial form of apre-mining microearthquake accident intensive belt in a working face deep strong aquifer and a relative water-resisting layer above the strong aquifer is acquired through the microearthquake monitoring system; the working face deep concealed water-conducting channel is subjected to grouting reinforcing according to the location and the type of the identified working face deep concealed water-conducting channel; the spatial and temporal distribution characteristics and evolution characteristics of the microearthquake accident in the mining process are acquired when the working face is mined, the location and the type of working face deep concealed water-conducting channel which is not found out and not effectively blocked are identified according to the spatial and temporal distribution characteristics and the evolution characteristics of the microearthquake accident in the mining process, the location and the type of the concealed water-conducting channel in the relatively deep position of the working face can be accurately identified, and important evidences are provided for mine grouting blocking and water burst prevention.

Description

technical field [0001] The invention relates to the technical field of methods for detecting water-containing abnormal bodies in coal mine operation areas, in particular to a method for detecting hidden water-conducting channels deep in a working face. Background technique [0002] In coal mines, especially coal mines with a mining depth of more than 1,000 meters, the hidden water guide channel in the deep part of the coal mine working face is the main cause of water inrush during mining. In the past ten years, there have been more than 10 such water inrushes in key coal mines in Hebei alone, including 3 times of well flooding, 2 times of level and water flooding, and 5 times of surface flooding, with direct economic losses of hundreds of millions of yuan. The reason is that relying on the existing downhole geophysical prospecting and drilling technology, it is impossible to find out the hidden water channel in the deep part of the working face in advance, and the failure to...

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Problems solved by technology

[0003] At present, the commonly used method for identifying hidden water-conducting channels in the deep part of the working face is mainly through downhole geophysical prospecting and drilling methods, but this method can only identify the development of the hidden water-conducting channels at a depth of 60m in the working face. The development of the aqueduct cannot be identified

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