Study on monitoring and variation law of strata movement induced by caving mining of slowly inclined large and thick orebody

Taking caving mining method in Chengchao Iron Mine as engineering background, based on GPS monitoring data, deep rock mass deformation and collapse monitoring data and on-the-spot surface movement record, the collapse and movement rules of rock strata in the mining area were studied. The studies have shown the following: Underground mining has the law of delay of surface movement and jump of limit angle development. The roof caving of concealed...