Evolution Mechanism of Water-Conducting Fissures in Overlying Rock Strata with Karst Caves under the Influence of Coal Mining

There are a large number of karst caves in the limestone rock strata mining area, and water seriously restricts safe efficient recovery coal resources. In order to reveal influence law on evolution water-conducting fissures seam mining, numerical simulation method UDEC software is employed analyze development characteristics under conditions different sizes. By comparing analyzing overlying displacement fields caves, obtained. The research results show that size cave directly affects maximum height mining; when thickness 3.0 m, larger radius is, higher greater overall sinking Yulongshan is. When between 10 m 15 through-type channel formed working face after mined, consistent with field monitoring results. provide an important reference for prevention treatment inrush disaster areas.