05 Block Model Prep PDF [PDF]

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Whittle Strategic Mine Planning 2008



Block Model Preparation



Whittle Block Model



Whittle requires a block model generated in another software package e.g. Surpac, GEMS, Datamine, Vulcan, Minesite There are several formats that Whittle will accept There is required data the block model MUST include



There is optional data the block model CAN include



Whittle Block Model



Whittle requires a block model generated in another software package The Whittle block model usually starts with the geological model The geological model contains some information that could be used in Whittle It will require other data to be added



Whittle Block Model Import Formats



Mine planning packages such as Datamine and Medsystem Flat file (or CSV) Whittle’s own format called Mod and par file (for this course we will focus on this format)



Whittle Block Model Import Formats



Mod File Format



Can be ascii (text) or binary



If Ascii, can be fixed (column) or free (csv) format Must include required information



Example Fixed Format Mod File



Block line



I J 19 36 19 36



Parcel line



I J 20 36 20 36



K No parcels MCAF



PCAF



tonnes



1 1 1 SULF



1.000 2160.



1.000 159.



2160. 769.



K ROCK



tonnes



1 1 1 SULF



1.000 2160.



metal1 1.000 97.



metal2 2160. 305.



Example Free Format Mod File I J Block line



PCAF



45,73,54,8,2.097,0.992,192.0,6 I J



Parcel line



K No parcels MCAF



K ROCK



tonnes



45,73,54,TRAN,24.0,8.9 45,73,54,TRAN,24.0,8.9 45,73,54,TRAN,24.0,3.4 45,73,54,TRAN,24.0,8.9 45,73,54,TRAN,24.0,8.9 45,73,54,TRAN,24.0,8.9 45,73,54,TRAN,24.0,8.9 45,73,54,TRAN,24.0,8.9



metal1



tonnes zone



Mod File Required Data



IJK for block position



Tonnages for block and parcel MCAF and PCAF for block (can be 1) Contained metal and Rock code (max of 4 characters) for parcel Limit of 999 parcels per block and 999 blocks in any direction



Mod File Optional Data



Zone number for defining slopes



Mine number if multiple mines exist Block value if you wish to predetermine the value used in the optimisation



Geological Block Model Data



Data that MAY be sourced from the geological block model includes Grades (to generate contained metal) Density (to generate tonnes) Rock code (max of 4 characters) Position and number of parcels (IJK and parcel number) Zone number (must be consecutive integer)



Model Validation The importance of this step cannot be over emphasised



Ensure all data is valid by Whittle’s definition (no negatives, no zero CAFs, AIR in correct place, grade and sg=0 for air) Validate exported model by generating report in GMP and comparing to report in Import Block Model node – check tonnes, grades, CAFs by bench and by rock code