Abstract: in order to evaluate the coal mining degree ffected to the loose aquiferaccording to the mining sol layer underied the looe aquifer,the drlling fuid consumption.water able observation.,microres stity scan inaging logging ,physcal simulaton and other means were applied to shoiw the development aw of the wae fow cracks in the soil layer during the cal mining operation. The study resuts showed tat thephysical s imulaton experinent found that the wate fow crack zone developed to the sail ayer and the cracking and mining ratio was 28.9.The site measurement showed that the identifed acuracy of the completed cracks was100% by miero resistivity scan imaging logging. The identified cracking and mining ratio of the crack adjustment was 28.2,which was fiting with the simulation results.