Bottom plate 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 bottom plate water inrush early warning method based on a high-density electrical method. The method comprises the steps that a floor stratified geological model is established according to mine geological data and borehole logging data, before a working face is not mined, the apparent resistivityvalue of a coal seam floor rock stratum is measured actually, and a resistivity background value under the condition that the working face floor rock stratum is not interfered by mining is obtained;the minimum safe water-resisting layer thickness of the bottom plate is determined; the water inrush early warning grades are divided into three different early warning grades, including general alarm, serious alarm and emergency alarm, and corresponding response measures are formulated. According to the invention, a high-density electrical method monitoring means is adopted, the resistivity change characteristics of different rock strata in a water-rich state can be monitored, and an early warning threshold value is set based on the development height of a low-resistance abnormal area of thebottom plate, so that the requirement of real-time alarm is met.

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...

AI Technical Summary

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

Images