A Water Inrush Early Warning Method Based on High Density Electrical Method

Abstract

The invention relates to the technical field of coal mine water regime monitoring, in particular to a floor water inrush early warning method based on a high-density electrical method. The method includes: establishing a floor layered geological model based on mine geological data and borehole logging data, and measuring the apparent resistivity value of the coal seam floor rock layer before the working face is mined, and obtaining the floor rock layer in the working face that has not been disturbed by mining. The background value of the resistivity under certain conditions; the minimum safe water-resisting layer thickness of the bottom plate is determined; the water inrush warning level is divided into three different warning levels, including: general alarm, serious alarm and emergency alarm, and corresponding response measures are formulated. The invention adopts the high-density electrical monitoring method, which can monitor the change characteristics of the resistivity in the water-rich state of different rock formations, and sets the early warning threshold based on the development height of the low resistance abnormal area of ​​the floor, so as to meet the requirement of real-time alarm.

Description

technical field [0001] The invention relates to the technical field of coal mine water condition monitoring, in particular to a bottom water inrush early warning method based on a high-density electrical method. Background technique [0002] At present, the domestic coal mine water condition monitoring system mainly conducts real-time monitoring of borehole water level, mine drainage and sump water level, etc., and its function is still far from the early warning requirements of water inrush danger in mining face. There are also a small number of floor water inrush monitoring mainly based on single factor or static monitoring, only regular and fixed-point monitoring of suspicious sections of the coal seam floor, such as borehole stress monitoring, borehole water pressure monitoring, etc. Full-time and space-time online monitoring of the bottom plate. [0003] The information disclosed in this Background section is only for enhancement of understanding of the general backgro...

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Problems solved by technology

[0002] At present, the domestic coal mine water regime monitoring system mainly monitors the borehole water level, mine drainage and water tank water level in real time, and its function is still far from the early warning requirements for water inrush risks in the mining face

There are also a small number of floor water inrush monitoring, which is mainly based on single factor or static monitoring. It only conducts fixed-point monitoring on suspicious areas of the coal seam floor, such as borehole stress monitoring, borehole water pressure monitoring, etc., and cannot realize the monitoring of the working face. Floor full-time online monitoring

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