Photogrammetry Method for Fast and Accurate Measurement of Strata Movements and Deformations for Scale Physical Mining S
- PDF / 2,974,549 Bytes
- 13 Pages / 595.276 x 790.866 pts Page_size
- 12 Downloads / 158 Views
Photogrammetry Method for Fast and Accurate Measurement of Strata Movements and Deformations for Scale Physical Mining Simulations Yi Luo 1 & Jian Yang 1
&
Yujia Lian 1
Received: 15 June 2020 / Accepted: 5 August 2020 / Published online: 11 August 2020 # Society for Mining, Metallurgy & Exploration Inc. 2020
Abstract Scale physical models, constructed according to the principle of similarity theory, have been widely used to simulate the mining disturbances to surrounding strata and to evaluate the effectiveness of implemented ground control techniques. This technique has also been used for studying mining-induced surface and subsurface subsidence. The movements of the observation points installed on the physical model at different mining stages are currently measured using total station which is time-consuming and inaccurate especially on small scale models. A photogrammetry-based measurement system has been developed. During a physical modeling process, photos of the model can be taken during the simulation process reducing survey time from hours to a few seconds. A program, Photogrammetry Analysis for Physical Modeling of Mine Subsidence Process (PAPMMSP), developed based on photogrammetric principle is used to quickly identify the installed observation points and accurately determine their coordinates. The measurement accuracy is well under submillimeter level—an ultra-important advantage as any measurement errors in coordinates are magnified by the model dimension scale (commonly 20 to 400). A physical modeling case of subsurface strata movements and deformations associated with longwall mining operations is presented in the paper to demonstrate the functions and capabilities of the developed photogrammetry program. Keywords Photogrammetry method . Measurement . Strata movements and deformations . Physical mining simulations
1 Introduction The studies of movements and deformations of overburden strata and ground surface caused by longwall mining operations in underground coal mines have many important applications, such as gob well degasification, active gas well stability, groundwater protection, and multiple seam mining interactions [1–5]. Therefore, a good understanding of the characteristics of surface and subsurface strata movements and deformations is essential for accurately accessing the potential influences and for properly designing and implementing effective and efficient mitigation measures to reduce or even eliminate mining-induced disturbances. Currently, there are the following four popular research methods to the study of the characteristics of ground strata movements and
* Jian Yang [email protected] 1
Department of Mining Engineering, West Virginia University, Morgantown, WV, USA
deformations during subsidence process: theoretical analysis, field measurement, numerical simulation, and physical modeling. Theoretical analysis method is difficult to apply to investigate ground strata movements and deformations because the ground subsidence process is too complicated to represent the charac
Data Loading...
