Analysis of influence of extreme rainstorm weather on mine hydrogeological conditions:Taking water prevention and control work of Liangbei Mine as an example
Extreme rainstorm weather not only causes great pressure on mine flood prevention and control of water damage,but also changes the regional hydrological cycle process caused by extreme rainstorm.It also causes abnormal mine hydrogeological conditions in the period after rainstorm,making the threat of water damage far greater than other disasters during coal seam mining,and has a continu-ous impact on the prevention and control of water disasters.Taking the water prevention and control work of Liangbei Mine as an exam-ple,the coupling effect of extreme rainstorm on mine water was preliminarily analyzed through comprehensive accurate geophysical pros-pecting results,borehole hydrological observation records and numerical simulation.First of all,the water level of the mine hydrological observation well increased significantly,and the comprehensive geophysical methods of the mine also showed that the spatial distribution of rich water in different aquifers of the deep,medium,and shallow coal seam floor was more complex;secondly,surface water penetrated down through cracks,resulting in the rise of mine groundwater level.In view of the strong heterogeneity of aquifer,the karst fissure spaces exposed by different boreholes exhibit varying sizes of water output and significant differences in water pressure distribution,leading to increasingly complex hydrogeological conditions in mines;finally,the further numerical simulation analysis showed that the surface water after the extreme rainstorm was supplemented to the mine aquifer water,resulting in an increase in the water volume and water pressure of the mine floor,but it would gradually tend to a new balance over time.
extreme rainstormhydrogeological conditionsmines water prevention and controlnumerical simulation
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