Research on key technology to control Ordovician limestone water disaster on surface region of deep mining depth mine

in order to safely mine the cal rescuces in the deep depth of Hanxing Mlining Area, an idea on the'regional acvance control of Ordovician limestone water disaser was provided and aresearh program was conduced on the completed tfechrology of safety mining in the seam with the deep depth and high pressurized water in North China coafed.Fron the theoretical stctythe foor water inush mechanism with 'zoning and timing section breaking 'was obtained. A wateresisance coe ficient method was appied to evaluate the pressure bearing capacity of the wate isolated layer in the foo of the rial mining block.The key technology of the muit branch subhorzont l dre ctionald iing exploration on the surface ground was successilly reseached.From rock mechanics and waterdynamics.the paper stated the grout difusion mechanism of the horizontal borehole grouting in the crack aqurer and provided the calculation formulaofthe borehole space .When thedrlling operatiowas in the Karst or broken teactonic conditons a control technology with abottom grout was researched.The advance completed techrology to conrol he Orcdovicanlimestone water disaster in the surace region was sucssilly applied in Julon Mine, which showed obviou fechical and econonic efifet as e the enironment efect.