Exploration and practice of the landslide area solution at -330 m level ore dumping chamber and the main chute in Xingshan iron ore mine

On April 23，2013，the wall was collapsed at the north of -330 m level ore dumping chamber of Xingshan iron ore mine towards the direction of the main chute wellbore center，and the main chute wellbore was collapsed，which caused ore crushing process downtime.The solution was to take grouting into ore dumping chamber indoor for solid，clearing the cavern wall.Then the U25 steel arch was used in the chamber，along with the combined supporting method of wear-resisting board plus reinforced concrete to repair and reinforce.The construction period was only 12 days.Through experts’ argumentation and daily production validation，the solution to the landslide area of ore dumping chamber was reasonable with short construction period and stability in use process.