Abstract
This study mainly presents the method for monitoring the surface dynamic subsidence basin (SDSB) caused by underground coal mining and obtaining parameters of mining subsidence (PMS) in the short term by using an unmanned aerial vehicle (UAV) Photogrammetry Technology. The basic ideas and methods are proposed; that is, the two-stage surface digital elevation model (DEM) is obtained in the short term by UAV; The SDSB is obtained through two phases of DEM subtraction; Based on the dynamic inversion method established in this study, the PMS was obtained. The UAV method was used to monitor the Wangjiata coal mine in Inner Mongolia of China three times in three months to obtain the three phases of DEM; we obtained the two phases SDSB by the three phases of DEM subtraction. The accuracy of DEM and SDSB were 118 mm and 121 mm respectively, Although the accuracy cannot fulfill the requirements of mining subsidence, the PMS was obtained by dynamic inversion method of full subsidence basin fitting, which has better resistance to errors; hence, the obtained PMS are reliable. Based on the engineering application, this study concludes that as a new technology, UAV photogrammetry technology can obtain the SDSB of coal mining areas in a short period with reliable PMS. Meanwhile, it has the advantages of low cost, flexible maneuverability, and so on, and overcomes the shortages of traditional observation stations, which has long observation time and high labor intensity, needs to bury fixed measuring points and easily lose them, and just has a small amount of “spot-like” observation data that cannot reflect the deformation characteristics of the whole subsidence basin. Furthermore, it is feasible to apply this method to mining subsidence monitoring and parameter inversion, and it has a great application prospect for the mining area purposes.
Highlights
The coal mining–induced surface subsidence is a complex spatiotemporal process and causes ecological environment damage
unmanned aerial vehicle (UAV) Photogrammetry technology can enhance the efficiency and obtain rich observation data of subsidence basin, which is equivalent to a high-density planar observation station
In this study, taking Wangjiata Coal Mine as an example, we examined the method of applying UAV Photogrammetry Technology to monitor mining subsidence and surface mining subsidence parameters inversion in the mining area
Summary
The coal mining–induced surface subsidence is a complex spatiotemporal process and causes ecological environment damage. Some problems exist in both methods as follows: (i) the field labor is large; (ii) the observation efficiency is low, making it unable to be used in a large area; and (iii) it is difficult to layout the target uniformly and measure the center coordinate of the target in mountainous areas with complex topography These limitations restrict the promotion and application of 3D laser scanning technology in mining areas. UAV Photogrammetry technology can enhance the efficiency and obtain rich observation data of subsidence basin, which is equivalent to a high-density planar observation station This method provides more comprehensive measured data and precise predicted parameters for mining subsidence. In this study, taking Wangjiata Coal Mine as an example, we examined the method of applying UAV Photogrammetry Technology to monitor mining subsidence and surface mining subsidence parameters inversion in the mining area
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
