Research progress on hazard mechanism and prevention measures of water in mine separated bed
Due to its characteristics of unclear water bursting signs,large instantaneous water volume,hysteresis,periodic water bursting,etc,the research progress in the formation,hazard mechanism,prevention and control technology,monitoring and warning of separated bed water is systematically summarized.Separated bed water disaster is the coupling result of stope overburden movement and groundwater movement under the influence of mining.Through the performance of water bursting accidents,the structure and movement characteristics of overburden,the groundwater movement law and the relevant research status,the basic conditions and development rules of separation water are summarized.The mechanism of water bursting causes secondary disasters such as mud and sand collapse,gas emission,and cutting roof cutting support crashing.The vertical and horizontal position prediction of separated bed water is the key to the control of separated bed water disaster.On this basis,five control methods of separated bed water hazard are introduced:surface straight-through water discharge hole,separated bed grouting filling,underground closure hole and underground diversion hole,surface drainage hole.The characteristics and problems are analyzed combining with the engineering practice.The separated bed water hazard risk is evaluated by the lithology combination and geological conditions of the rock strata,the early warning can be realized based on the monitoring data of muti physical fields,and the problems to be solved in the study of separated bed water are put forward.
overburden movementwater bursting from separated bedhazard mechanismprevention and control methodsmonitoring and early warning
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