Research on simulation of mine water inrush real-time monitoring of using electrical resistivity constrained inversion imaging method

For real-time monitoring of mine water inrush catastrophic process and early warning of precursory,electrical resistivity constrained inversion imaging method was proposed.First,inequality constraints characterizing variation range of grid resistivity was introduced into electrical resistivity inversion imaging equation.Multiplicity of inversion was inhibited by the means of inequality constraints.Meanwhile,fast inversion algorithm was designed to effectively improve computational efficiency.Then,numerical experiment of micro faults water inrush real-time monitoring using constrained inversion imaging method was carried out.And,by gray correlation theory,inversion image responses characteristics to water inrush precursors were evaluated quantitatively,in which the abnormal events(e.g.,strata fracturing,water inrush channel forming) and gray correlation coefficient of inversion images exhibit monotonic developments or mutation.Finally,real-time monitoring method was applied to physical model test of mine water inrush.It achieves realistically dynamic imaging and monitoring on important processes of water inrush,such as crack generation and propagation,and strata fracturing.And precursor information of water inrush hazard was precisely captured,813 s ahead of inrush.It suggests that real-time monitoring using electrical resistivity constrained inversion imaging method is feasible for mine water inrush monitoring and early warning.