Comprehensive monitoring and early warning system and method for floor water inrush in coal working face

Abstract

The invention relates to a monitoring and early warning system and method, belongs to the technical field of coal mine monitoring, and particularly relates to a comprehensive monitoring and early warning system and method for floor water inrush in a coal mining working face. The comprehensive monitoring and early warning system and method mainly focus on real-time monitoring and graded early warning of a goaf part during the recovery process and after the recovery process of a mine coal mining face, based on a "lower three zones" theory, and a numerical simulation method is combined to determine monitoring positions, a microseism monitoring subsystem is used for monitoring the damage depth of a floor in the coal mining working face, a multi-frequency continuous electrical monitoring subsystem is used for monitoring the height of water table of confined water in the floor of the coal mining working face, the distance between the lowest point of floor damage and the highest point of height of water table of the confined water is calculated; a floor water inrush coefficient method is used for dynamically calculating the water inrush coefficient of the floor of the entire working surface; and the level of floor water inrush early warning is determined through different water inrush coefficients, early warning indication of stress and strain, early warning indication of water temperature and water pressure, and early warning is performed.

Description

technical field [0001] The invention relates to a monitoring and early warning system and method, belonging to the technical field of coal mine monitoring, in particular to a comprehensive monitoring and early warning system and method for water inrush from the floor of a coal mining face. Background technique [0002] The formation of coal mine water hazards is the result of a series of factors. The occurrence of water hazards is manifested through the changes of various physical field parameters of the coal seam floor water inrush system. These parameters are collectively called precursor parameters. General precursory parameters include water pressure, water temperature, water volume, water quality, stress, strain, displacement, humidity, microseisms, elastic waves, etc. The occurrence of water inrush includes both the change of rock mass mechanical state and the change of groundwater seepage field, both of which are indispensable. Therefore, the monitoring of mine water...

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Problems solved by technology

But the system does not monitor water pressure, a very important parameter of the aquifer

[0007] Wu Qiang, Liu Chunsheng and others invented the "Mine Roof and Floor Water Inrush Monitoring and Forecasting System and Method", which disclosed a mine roof and floor water inrush monitoring and forecasting system and method. And multiple detection terminals including a controller and memory, three-dimensional vibration sensors, and electrodes, through real-time monitoring of the vibration and apparent resistivity changes of the roof and floor of the roadway, and comparing with the set threshold, the monitoring and forecasting of mine roof and floor water inrush is realized. But this invention only adopts microseismic to monitor water-conducting channel, adopts apparent resistivity to monitor water inrush water source, does not monitor the characteristic parameter of aquifer, as the change of water temperature, water pressure, stress, strain etc., causes its monitoring parameter relatively Single, decreased monitoring accuracy

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