Digital close-range photogrammetric application to small-scale physical simulation experiment

LI Chun-yi¹, CUI Xi-min², YU Yi-ju³

(1. School of Surveying and Landing Information Engineering, Henan Polytechnic University, Jiaozuo 454003, China;
2. College of Geoscience and Surveying Engineering, China University of Mining and Technology,
Beijing 100083, China;
3. Surveying and Mapping Press, Beijing 100045, China)

Abstract:In order to research the possibility of digital close-range photogrammetric surveying in small scale physical simulation experiment, physical model coinciding with engineering practice was constructed based on similar theory. The datum processing method and surveying precision of digital close-range photogrammetric were analyzed. And the function relationship between overburden subsidence factor q_r and the ratio z/H of stratum horizon z and mining depth H was researched. The results show that surveying points position mean error along horizontal direction is ±0.131 mm and vertical direction is ±0.192 mm. Therefore, multi-taking station cross direction digital close-range photogrammetric can completely satisfy the precision need of physical simulation experiment. And the empirical formula can be utilized to represent evolution law of stratum subsidence factor.

Key words:close-range photogrammetric; physical simulation; light-rays adjustment; surveying precision; subsidence factor