Study On Failure Mechanism And Treatment Of Shaft Influenced By Rock Collapsing In Goaf Area

The mining industry has a long history in China, and lots of goaf areas were left by early immethodical exploitation in the shallow part. Because of the existing of the goaf, it would cause the surrounding rock that above the goaf collapsed, so it would cause the ground surface to crack and collapse or other geological disasters, which composed huge threaten to mine-shaft and surface constructions safety.According to No.1 and No.2 shaft in Wang-Er-Shan Gold Mine, the paper analyzes the failure mechanism of shaft and the influence factor, and provides a new treatment scheme, and also summarizes the correlative construction technology. Based on the relative research about goaf area, the current situation and the situation after treatment are simulated numerically by the finite element analysis method, which shows the surrounding rock's plastic state, stress field, displacement field, the horizontal stress and displacement on the top of shaft lining. The comparison between the two situations shows that the new treatment scheme provided is available, and has a good result. At last, the paper analyzes the effects that we have got when the crack under different depth which is caused by explosion.The topic has provided new thoughts for the treatment research on goaf area and the relative problems, and also has offered reference for dealing with the geological disaster that caused by goaf area.