Subsidence extraction model of mining area with probability integral method based on SBAS technology

Based on the mining subsidence in the mining area with the features of the rapid subsidence speed and high subsidence value, according to the In SAR technology hard to accurately get the full basin information of the surface ground subsidence caused by the coal mining, a probability integral method (PIM) was provid ed to have the subsidence value of the mining area based on the SBAS technology.Based on an experiment with No.52304 mining face in a mine of Shaanxi Province a s a case, the SBAS technology was firstly applied to have the boundary of the subsidence basin, then in combination with some boundary points obtained with the SBA S technology and the RTK measuring point (subsidence value 2300 mm) with the reversed probability integral method parameters and the subsidence basin.Finally, the boundary integration was obtained with the reversed basin center and the SBAS technology and the full basin information of the surface ground subsidence were picked up and completed. The results showed that the relative error of the max subsidence value in the strike and inclination of No.52304 coal mining face was 0.2% and 6.0% i ndividually.The method could effectively solve the In SAR technology hard to monitor and measure the high gradient subsidence of the mining area and could provide a new application access for the InSAR technology to monitor and measure the mining subsidence in the mining area.