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Figure 1

Depiction of the RTH extraction area and areas of underground work [1].
Depiction of the RTH extraction area and areas of underground work [1].

Figure 2

Surface deformations.
Surface deformations.

Figure 3

Unmanned aerial vehicles suitable for surface use: (A) Teklite, (B) GoSurv, (C) Swamp Fox, (D) Quadcopter, (E) Phantom 2 Vision+, and (F) Aeryon Scout [4].
Unmanned aerial vehicles suitable for surface use: (A) Teklite, (B) GoSurv, (C) Swamp Fox, (D) Quadcopter, (E) Phantom 2 Vision+, and (F) Aeryon Scout [4].

Figure 4

DMR display made with different interpolation algorithms. (A) Isohypse of a hypothetical area. (B) DMR constructed by vertical scanning algorithms. (C) DMR constructed by maximum slope algorithms. (D) DMR produced by the weighted average algorithm [5].
DMR display made with different interpolation algorithms. (A) Isohypse of a hypothetical area. (B) DMR constructed by vertical scanning algorithms. (C) DMR constructed by maximum slope algorithms. (D) DMR produced by the weighted average algorithm [5].

Figure 5

Remediated area above the mining area.
Remediated area above the mining area.

Impact categorization [1].

Category [Limit]
Segment I II III IV
Movement measurements Above 50 mm, also new measurement sites Up to 50 mm and deformation trend Up to 20 mm and deformation trend Below 20 mm
Inclinometer measurements Above 50 mm, also new measurement sites Up to 50 mm and deformation trend Up to 20 mm and deformation trend Below 10 mm

The scope of unmanned aerial vehicle uses in mining [4].

Surface mines Underground mines Closed mines
- Mine operation - Geotechnical characterization - Land subsidence monitoring
- 3D mapping - Rock size distribution - Recultivation
- Bank stability - Monitoring and measurement of gases - Surface mapping
- Mine safety - Mine rescuing - Detecting gas pockets
- Structure monitoring - Acid leakage monitoring
- Facility management