Quarry mapping, stockpile surveying and mine management using mobile lidar scanning
Dynascan M250 collects far more detailed point-cloud data than traditional survey techniques and reduces time spent in hazardous environments.
Mobile laser scanning has been a game-changing technology for all forward-looking quarry and plant companies who use this new technology to obtain data relating to a wide range of activities safely and cost-effectively.
The benefits of quarry mapping
The ever-changing nature of quarry landscapes means that sites often need to be scanned quickly to aid in the efficient planning of such operations as the re-routing of roads, positioning of heavy machinery, and surveying of blast materials and stockpiles.
The M250 system's portability and long-range capabilities mean that it can be mounted to a variety of quarry transport for faster, safer mapping of entire sites.
Quarrying and mining applications include:
- Whole site mapping: Map entire quarries quicker for improved project management.
- 3D rockface profiling: Scan vast quarry walls in detail to help plan safer, more optimised blast designs.
- Blast analysis: Pre- and post-blast mapping to monitor changes to rockface, volume and position of material blasted.
- Stockpile/volumetric surveys: Measure stockpile volume, height, diameter and density to help calculate inventory, plan deliveries/collections, and to support theft prevention.
- Limited and hazardous access surveys: Long-range capabilities enable mobile mapping from a safe distance.
Focus on: stockpile surveying
Faster data collection
Mobile 3D laser scanning offers quick and accurate inventory measurements. Dynascan M250 can be mounted on the back of a standard sports utility vehicle (SUV), allowing data to be collected as the vehicle drives around the stockpiles.
While quarry and plant managers recognise the necessity of carrying out physical inventories of material stockpiles for accounting purposes, many regard it as a chore that takes up time and which has the potential to slow production.
Manual surveys using total stations and traditional global positioning system (GPS) equipment are time consuming, requiring 10 to 20 shots on a typical 15,000 cubic-metre stockpile. Dynascan M250 not only reduces the time spent on stockpile surveying while enhancing the safety of workers, but also offers a level of surface detail that is incomparable to that collected from total stations: 100,000 3D points can be collected in just a few minutes.
The 3D point data is collected by driving around the stockpile, typically at a speed of between 5 and 10 miles per hour, with the M250 rotating at 1,200 revolutions per minute. Because Dynascan M250 includes a GPS receiver and inertial measurement unit (IMU), data can be geo-referenced to an exact location. This ensures that each inventory operation can be referenced to the same co-ordinate system and pile limits each time the inventory is performed: a key benefit when accountants require accuracy and traceability of methods.
Faster data processing
Mobile laser scanning speeds up the data collection stage of the workflow and, when compared to aerial photogrammetry, offers much faster turnaround of the actual physical quantities.
The software allows customers to compute volumes within a matter of hours, so that stockpile quantities recorded are accurate on a set day, rather than reflecting a historic situation.
Improved safety and compliance
Regulations vary, but many countries have rules applying to stockpiles and other related facilities, such as drawholes, bins, hoppers and surge piles. Laser scanning eliminates the need for anyone to walk on a storage pile and the mobile M250 means that the survey crew can stay safely inside their vehicle.