Processing Technology of Drilling Casing Fracture Accident

Mine pressure activities will lead to driling casing fracture and yielding water around the floor of drilling field.According to the situation analysis,the processing program of extracting the fracture casing by reaming firstly and letting down the small diameter casing,then using the method of plugging fracture points by ramoff and mixed grouting by mortar is studied,which successfully control the yielding water of floor.