Method for monitoring convergence deformation of pre-drilled vertical shaft

The invention relates to a method for monitoring convergence deformation of a pre-drilled vertical shaft, which comprises the following steps of: drilling a group of pre-drilled holes in a preset position of a vertical shaft section, and respectively installing inclinometer pipes; an inclinometer is mounted at the top of the inclinometer, and a laser range finder and a reflector are mounted at the mounting position of the inclinometer; forming a loop by the distributed optical fibers at the orifices and burying the distributed optical fibers into the corresponding inclinometer pipes; measuring the center frequency of each distributed optical fiber at each depth as an initial value, and obtaining the initial angle of the inclinometer and the initial distance of the laser range finder; after the inclinometer deforms along with the measured object, measuring the center frequency of each distributed optical fiber at each depth as a test value, and obtaining the test angle of the inclinometer and the test distance