Application of High Precision GPS in Mine Subsidence Monitoring Dr Debashish Chakravarty Assistant Professor Department of Mining Engineering, Indian Institute of Technology, Kharagpur, India Email: dc@iitkgp.ac.in Subsidence due to mining is a common phenomenon in which the earth surface is gradually shifted from its original position when pillars or barrier supports left in underground fail to withstand the load of the overlying strata. Depending upon the excavation, extent and amount of subsidence may vary a great magnitude hampering smooth mining operations. Hence there is a necessity to monitor the ground movement to avoid such incidences and in which case high precision GPS surveying can play an important role for predicting and control of subsidence. In this paper, working principle, advantages of GPS is explained and its application related to mine subsidence monitoring is discussed. In general, for detection of slightest changes in the ground profile the developed method using the latest state-of-the art technology would prove of immense utility and significance. The accuracy level has been found to be better than those of set by DGMS norms.