Rock crossing hole blowout preventor

The invention relates to a rock crossing hole blowout preventor. A connecting and pumping pipe I (3) and a connecting and pumping pipe II (8) are arranged on an opening of a drill hole (1), the connecting and pumping pipe I (3) is communicated with a flow collecting pipe (4), the connecting and pumping pipe II (8) is connected with an air inlet (9-1) of a gas-water separator (9), an air outlet (9-2) of the gas-water separator (9) is communicated with the flow collecting pipe (4) through a gas pumping pipe (6), and a water-coal dust outlet (9-3) of the gas-water separator is connected with a drainage channel through a coal-water secondary separator (11). Through the rock crossing hole blowout preventor disclosed by the invention, coal dust is prevented from largely surging outwards along the drill hole during drilling, situations of hole spraying and gas spraying in a process of drilling crossing holes in a stone drift are stopped, the regular running of a pumping system is ensured, and the safety production e