Pressure-bearing fault activated water inrush multi-field information collaborative monitoring sudden-inrush forecasting method and system

Abstract

The invention discloses a pressure-bearing fault activated water inrush multi-field information collaborative monitoring sudden-inrush forecasting method and system. In the mining process of a coal seam with a fault, stope surrounding rock stress change is caused by mining, thus stope surrounding rock is subjected to displacement, damaged fractures are produced accordingly, a seepage water inrushchannel is formed, and stope surrounding rock seepage and temperature change are caused. Through an optical fiber stress sensor, an optical fiber displacement sensor, an optical fiber seepage pressuresensor, an optical fiber temperature sensor, an optical fiber micro-seismic sensor and a network parallel circuit copper electrode, fault activated water inrush precursory information of fault surrounding rock stress, displacement, seepage pressure, temperature, micro seism and apparent resistivity in the mining process is collected. According to initial values and change amplitudes of the precursory information of the stress, the displacement, the seepage pressure, the temperature, micro seism and the apparent resistivity, pre-warning thresholds and judgment criterias corresponding to the precursory information are determined. By utilizing the pressure-bearing fault activated water inrush multi-field information collaborative monitoring system, real-time and dynamic monitoring pre-warning of activated water inrush during pressure-bearing fault mining is achieved.

Description

technical field [0001] The invention relates to a mine water disaster monitoring system and a water inrush forecasting method, in particular to a multi-field information collaborative monitoring system and an imminent outburst forecasting method for structurally activated faults such as underground coal seam mining processes. Background technique [0002] my country is rich in coal resources, but the geological conditions are complex, which makes geological disasters occur frequently in coal mining. With the further increase of coal mining depth and mining intensity, the threat of confined water to the mining face is becoming more and more serious, especially in the mining face with fault structures, the problems of water inrush prediction and prevention are more prominent. Mine water inrush not only caused economic losses and casualties, but also caused serious pollution and damage to water resources and environment in mining areas. Therefore, effective monitoring, forecas...

AI Technical Summary

Problems solved by technology

At present, for the monitoring and forecasting of water inrush from mining activation of confined faults in coal-measure strata, only qualitative monitoring and analysis of the evolution law of mining information such as stress and displacement during the process of fault activation water inrush is performed. The evolution law of fissures, seepage, temperature and other information is still unclear, and there is a lack of quantitative identification and systematic analysis of on-site fault activation water inrush water source, water volume, water pressure, water temperature and other associated information, and there is no multiple associated information of fault activation water inrush process Collaborative monitoring system and quantitative imminent outburst forecasting methods have forced many mines to give up the mining of a large amount of coal resources in order to prevent water inrush from fault activation and reserve them as waterproof coal pillars, and more mines are temporarily unable to mine due to water damage threats

Images