Hidden Troubles Analysis of Mined-out Area Based on Actual Detection and Its Treatment Scheme

In order to treat the hidden trouble of mined-out areas formed by illegal mining in a gold mine,the mined-out areas were detected with 3D Laser detection system.3D visual model of mined-out area was established using modeling software Surpac,Such data as the volume and exposed area of the mined-out areas and the collapse of surrounding rock,etc.were determined.Based on these,the hidden troubles of mined-out areas were analyzed.Combined with the actual conditions of the mine,a combined treatment scheme of filling and closing mined-out area was proposed.A ground pressure monitoring system was established to verify the effect of mined-out area treatment.The data of ground pressure monitoring showed that after treating the mined-out areas the displacement of rock tended to be stable,the rock stress decreased,these indicated that the desired effect of mined-out area treatment has been achieved.