Abstract: Aiming at the condition that Diglonggou Coal Mine +970 m main cross-hole encounters the large karst geological structure problems of a large number of viscous yellow mud, sand and high pressure karst water in strong water bearing stratum construction, we use comprehensive exploration technology including blowout prevention and technology, controllable discharge pressure curtain grouting water treatment technology to capture the difficulty of tunneling through the large water-filled karst fracture zone, which successfully solves the problem of coal mine roadway construction of water control.