Research On Eastern Jinshandian Iron Caving Range And Surface Deformation Under Complex Condiitons

The caving of Jinshandian Iron Eastern in-270m segment has been completed, but thetop-160m level to0m exists a wide range of people goaf collapse surface spots, cracks inthe safe production of a serious threat to the Eastern District, was resulting in Easternproduction interruption. Taking into account the production of safe and what areas in theproduction system using the connection and continuation of the complex conditions ofJinshandian Iron Eastern caving technology research to improve mining safety.The caving engineering18m thick the stope cover layer, the roof of the goaf of the topof China surrounding rock caving bound on the bottom of the stope security threat. Withthe exploitation of the underground ore body, mining field side will form a range of groundgoaf. Roof to form the cover layer thickness, the range can not meet the bottom of the orebody mining demand, ellipsoid to put the thickness of the overburden of the mine theoryand kinetic theory of gases Eastern stope, to develop a the overburden supplementaryprogram and delineated to complement the scope of the caving.Jinshandian Iron Eastern has repeatedly ground subsidence, the use of discreteelement software UDEC simulation China mining excavation, different combinations ofcaving excavation and underground orebody excavation program, the simulation results tothe field situation, a comprehensive analysis of cause of ground subsidence and groundmovement and deformation, and predict the ground movement and deformation trend of thetargeted response measures and recommendations.