Improving the use of Mine Closure Data Over Time. David Malins Jacobs, Senior Spatial Consultant

Transcription

1 Improving the use of Mine Closure Data Over Time David Malins Jacobs, Senior Spatial Consultant

2 Content 1. Iron Ore Mining in the Pilbara 2. Closure Cost Estimates 3. Spatial and Mine Closure 4. Inventory Preparation 5. Data Inconsistency 6. Gradual Improvement 7. Web based access to closure costs 2

3 Iron Ore Mining in the Pilbara A client of Jacobs owns and operates Iron Ore Mines Railway Lines Port Facilities 3

4 Closure Cost Estimates Our client prepares annual conceptual mine closure cost estimates The estimates : Covered all mining operations, rail and port Abided by corporate and statutory requirements Were prepared on a first principles basis Are made for different closure scenarios and at different levels of accuracy. 4

5 Spatial and Mine Closure Mine Closure Cost Estimate Knowledge base development Conceptual closure planning Closure strategy and management plan development Cost estimation Risk assessment Site Remediation Desktop studies and site investigations Risk evaluation and exposure risk analysis Reclamation and remediation Groundwater resource recovery and management Rehabilitation and Revegetation Topsoil management Habitat planning and recreation Rehabilitation planning and supervision Ecosystem function analysis Landform Design Soil and erosion analysis Landform stability assessment Acid mine drainage and geochemical analysis Spatial data input disturbance areas Domain mapping (domain - area that has similar closure methodologies, landforms and land-uses) Mapping for management Mapping for various risks Site mapping Domain mapping Flow and flood mapping Topsoil dump mapping Cleared areas mapping Domain mapping DEM creation and landform mapping 5

6 Inventory Preparation Review spatial information to classify disturbance Disturbance classified by areas of similar rehabilitation Disturbed Area High Disturbed Area Moderate Disturbed Area Low 6

7 Data inconsistency from year to year Closure requirements loosely based on type of infrastructure and mining activity represented Domain identification was inconsistent from year to year Determination of quantities was inconsistent from year to year Required significant rework Significant gaps and deficiencies in the data Impacting on cost estimate confidence and accuracy 7

8 Gradual Improvement 15 year period preparing closure cost estimates in the analysis of available data Incremental shift improvements Quantum shift improvements Improved accuracy and confidence Greater understanding of data Broader multi-disciplinary approach Use of improved technologies 8

9 Transparency of Reported Closure Costs A significant cost and time saving Redevelopment of the data management framework Initial preparation and reporting centred around proprietary estimating software A shift to a data warehouse concept has brought about greater flexibility in Data management Data transfer Data access 9

10 Multiple Applications from One Data Source Direct interaction of data with multiple applications Generate specific client reports Web based interface Improved ability to apply quality control on data Greater confidence in the cost estimates Ultimately the data warehouse will be shifted into a client-controlled service. 10

11 Spatially Enabled User Interface Facility or Domain based Drill down into cost Drill into associated data Data warehouse shifted into client controlled service 11

12 Benefits Data warehouse benefits Accessible at any site The ability to drill down and query data Removal of reliance on the Estimate report for data interrogation Flexibility to develop multiple report options 12

13 Summary Jacobs has been providing mine closure services for 15 years During that time spatial and data management support has improved in line with: Industry improvements The quality of the data from our clients The level of understanding our client and those undertaking the mine closure process have. Future direction is to make more data available to client and project teams whilst not overwhelming them. 13

14 Questions worldwide