The application discloses a kind of MJS broken
drill bit extraction device and extraction method, wherein MJS broken
drill bit extraction device is used to extract MJS
drill bit broken in reinforcement body, including high-pressure rotary jet drill and
alloy casing
pipe connected with the high-pressure rotary jet drill, propelling tube is installed on the high-pressure rotary jet drill, the front end of the propelling tube is provided with
electromagnet and
ultrasonic sensor, the
electromagnet and the
ultrasonic sensor are respectively connected with
direct current power supply and control component by wire and
signal line arranged in the propelling tube.The application can effectively extract MJS broken
drill bit from reinforcement body and underground structure by the form of
electromagnet combined with sensor, simple and effective operation, and the influence of MJS
drill bit fracture on subsequent construction is reduced to the greatest extent.