Characteristics of Dynamic Variation of Surface Subsidence by Mining Face in Longtan Mine

In order to master the dynamic variation rules and characteristics of surface subsidence caused by underground mining, a surface movement observatory was established on the surface of 3115 working face in Longtan Mine. Based on the analysis of the monitoring data by theoretical analysis method, the surface movement deformation curve was drawn and its characteristics were described in detail. The results show that the maximum subsidence is around 73 mm; the subsidence value, inclination value and curvature value of each measuring point increase gradually with the advance of the working face. By mastering the law of surface movement and deformation in mining of the working face, it can provide data support and technical guidance for comprehensive control of mining subsidence and geological environment protection of mining area.