Electromagnetic radiation monitoring early warning method of mine roof water inrush

Abstract

The invention provides an electromagnetic radiation monitoring early warning method of mine roof water inrush, belonging to a coal mine water disaster monitoring and early warning method. At a selected test point, the effective receiving direction of an electromagnetic radiation receiving antenna is arranged to face a roof area to be monitored, electromagnetic radiation signals are collected for seven days, and the electromagnetic radiation intensity and pulse number change range and change rate are calculated as a standard threshold value. The electromagnetic radiation signals are continuously monitored, according to the electromagnetic radiation intensity value of a monitoring area roof and the size and charge rate of a pulse number, a determination condition of roof water inrush is made, whether the roof has water inrush risk is judged, and thus whether the water inrush disaster is carried out is determined. The method has the advantages of simple operation, low testing cost, high efficiency and convenience.

Description

technical field [0001] The invention relates to an early warning method, and is especially suitable for an electromagnetic radiation monitoring and early warning method for mine roof water inrush used in the field of coal and rock dynamic disaster prevention and control. Background technique [0002] With the increase of coal mining depth, coal formation occurrence and mine hydrogeological conditions are becoming more and more complex, water inrush disasters are increasing year by year, and have become one of the five major disasters that seriously threaten mine safety. Mine roof water inrush accidents are usually sudden and secondary. How to effectively monitor and early warning of roof water inrush disasters is the key to prevent mine roof water inrush accidents. [0003] The representative methods of "water inrush coefficient method" and "lower three zone theory" can only carry out static analysis on the risk of water inrush, but cannot solve the problem of real-time dyna...

AI Technical Summary

Problems solved by technology

The disadvantage is that electrical prospecting is a contact technology, which requires complex electrode layout and complicated operation methods. Moreover, the measurement data needs complex inversion work to reflect the real water content of coal and rock mass.

In addition, the current electrical prospecting is often conducted downhole monitoring by manually carrying monitoring instruments, and the online monitoring technology is not yet mature.

The microseismic testing technology monitors the water inrush process by detecting the rupture and vibration of the coal and rock mass during the water inrush process, and can determine the formation process of the water channel. The shortcoming is that the microseismic technology is a contact monitoring. During the long-term monitoring process, mining activities and human Disturbance will cause loose contact between the instrument and the coal body, which will have a great impact on its test

[0005] The existing non-contact water disaster monitoring and early warning technology has high detection cost, and the layout of sensors, detection area and location are easily restricted by the underground environment, and it is difficult to monitor and early warning of mine roof water inrush. Solution

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