Simulation and application of physical simulation test of water inrush spread process in mine roadway system
Considering that the experimental research on the process of water inrush propagation in the mine tunnel system is still blank,a physical model test method for the flood spreading process in the mine roadway is proposed to scientifically reveal the flow law of water inrush in the mine tunnel system.At the same time,The evolution law of water inrush spread range,the distribution law of water depth in the roadway,the influence characteristics of water velocity,and the local water flow effect of roadway are discussed in depth.The prototype of the test mine roadway network system was designed by summarizing the type,layout,and structural characteristics of the mine roadway.Then,a normal test model of the 1∶10 mine roadway flood spread process was established based on the gravity similarity criterion.By analy-zing the distribution characteristics of the water inrush location and the evolution characteristics of the water inrush flow curve,multiple sets of test conditions are established.Afterward,the gravity circulating water supply and drainage system is used to realize the spread process of flood under different working conditions.The boundary flow,roadway water depth,and water surface morphology during the test were monitored and observed.The re-search results show that the spread of water inrush in roadways has a hierarchical evolution characteristic centered on the water inrush point and distributed according to elevation;The time-varying relationship of roadway water depth is positively correlated with water inrush flow.The positive correlation between water depth and flow rate in the downward spreading type is more significant than thatrising type.The water velocity of the roadway is related to the growth rate of the water inrush flow curve.The greater the growth rate,the faster the sprea-ding water velocity and the more the cumulative water inrush.The single-flow water velocity is positively correlated with water inrush flow,water depth,and roadway slope,and negatively correlated with the width of the roadway section.Among them,the water velocity is the most sensitive to the change in water depth and roadway slope.At the position where the structure of the roadway changes abruptly,the main flow line of the lower stream is deflected,and the dis-tribution characteristics of water depth and flow velocity are double-valued along the way or the section.The test results are consistent with the actual underground water gushing data and have wide application value in the practice of intelligent inrush water disaster prevention and e-mergency rescue engineering.
mine water inrushphysical simulation testwater inrush spread processroadway water depthroadway water velocity
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