COUNTERMEASURES FOR SOLVING THE GROUND PRESSURE AND SURFACE MOVEMENT IN SHANGQING MINING FIELD OF BANSHIGOU IRON MINE

Based on the geological investigation and measured ground surface movement,the regularity of displacement in Shangqing Mining Field is analysed.The conclusions are drawn that process of the progressive hanging wall caving and the displacement controlled with the faults.Although the angle of subsidence less than designed one due to the influence of surface movement,but the more accurate position of fault has been controlled.Therefore,the stability of western wind shaft not influenced.From the result of underground convergence measurement and geological investigation,the countemeasures of lessening ground pressure activity are put forward.