The invention relates to a method for preventing a vertical shaft wellhole from being damaged by adopting a ground water injection
water level stabilization method, comprising the following concrete steps: 1) analyzing the alluvium structure and water
regimen, and selecting a loose
aquifer of which the
water level continuous descends within over three years from the alluvium as a water injection position; 2) constructing a water injection hole around the wellhole with the shape consistent with that of a long-term hydrological observation well; 3) injecting water into the water injection position by
tap water or a water pump through a water injection hole; and 4) monitoring the water injection effect in the water injection process, wherein the monitoring contents comprise
aquifer water level monitoring and well wall variation monitoring, and the water
injection rate is adjusted based on the monitored water injection effect. The method can ensure the water levels of the wellhole and theaquifer nearby to be increased and relatively steady, reduce compression deformation and additional pressure strain on the well wall caused by loosened soil
layers around the wellhole due to drop of the water level, thus preventing the well wall from being damaged. Researching from the perspective of
hydrology-geological conditions of mines, in the invention, a method for fundamentally solving the problem of preventing the wellhole from being damaged is searched out based on the well wall fracture mechanism, and has obvious prevention effect, is convenient to construction, and is safe and economic.