Seymour, Jeremy (2017) Mine Subsidence Survey by UAV and Photogrammetry. [USQ Project]
Abstract
Subsidence due to mining in an underground mine can cause significant damage to buildings, structures, services and the environment. Subsidence is largely caused by longwall mining techniques used for the extraction of coal. Subsidence will be an ongoing issue while the longwall mining methods continue to be the most feasible method of coal extraction. To confirm the amount of subsidence occurring and ensure that there are correct measures in place to manage the risks associated, there will be a continual requirement for monitoring for the life of a mine.
An Unmanned Aerial Vehicle (UAV) is the general term used for a range of aerial vehicles that are unmanned and not under direct control. UAV’s have the capacity to carry a variety of different payloads, and therefore have the flexibility to undertake a wide range of applications. This dissertation focuses on the use of camera mounted UAV’s for the purpose of capturing photogrammetric images. The images are processed and used to produce a geo-referenced image. From these geo-referenced images spatial data can be produced to get outputs such as a digital elevation model. The technology associated with UAV’s is rapidly developing and with a reduction in cost and increasing availability, UAV’s may become a viable tool for carrying out mine subsidence surveys in the future. The advance in this technology will significantly increase efficiency and reduce field work times.
Research was conducted into the use of UAV’s for photogrammetric image capture. Planning was carried out to determine suitable flight heights, mission planning, camera settings and ground control to achieve a high quality of consistency, precision and accuracy. This dissertation sets out to compare the results achieved between standard field observations using conventional survey methods and photogrammetric UAV data. The project site covers an area with a current subsidence line. A number of factors were considered when determining the project site to ensure that the comparative results between standard survey methods and UAV could be compared. The main factors were as follows:
• level terrain,
• minimal ground cover, and
• lack of large obstructions that would alter the data, such as trees
A cost analysis for each of the survey methods was also carried out with recording of the field work times, office reduction times and total project completion cost. The field test used a multi rotor UAV - DJI Phantom 4. Further research could be conducted in the use of other models of multi rotor UAV’s and particularly in the use of fixed wing UAV’s for future subsidence monitoring surveys.
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| Item Type: | USQ Project |
|---|---|
| Item Status: | Live Archive |
| Additional Information: | Bachelor of Engineering (Honours)(Civil) |
| Faculty/School / Institute/Centre: | Historic - Faculty of Health, Engineering and Sciences - School of Civil Engineering and Surveying (1 Jul 2013 - 31 Dec 2021) |
| Supervisors: | Gharineiat, Zahra |
| Date Deposited: | 10 Sep 2021 00:54 |
| Last Modified: | 10 Sep 2021 00:54 |
| URI: | https://sear.unisq.edu.au/id/eprint/40806 |
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