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the most appropiate interpolation/algorithm for rock parameters

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Dear All,

Please can anyone help me the below questions:

1) what will be the most appropriate algorithm for interpolating points data from rock parameters for dredging purpose such as

UCS: Unconfined comprehensive Strength of Rock (MPa)

RQD: Rock quality discovery (%)

Carbonate Content of rock (%)

Fine Content (%)

Bulk Density

SPT: Standard Penetration Test

2) How can i import bathymetry data of a design into rockworks and also cut the levels and slopes of a model using the bathymetry data?

3) Determine the most suitable methodology to create soil models only for rock (separate cohesive and non-cohesive layers).

Thanks

Anu

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Hi Anu,

If your data is not associated with boreholes then your best option may be entering your data into the Utilities Datasheet. This would work great if each of these parameters have been determined for each sample and sample location. With that you could use the EZ Map to plot your data with different colors, symbols and sizes depending upon you data. Hope this helps.

Edward

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Thanks Edward

Unfortunately is very related to boreholes cos its actually borehole data those test were done at depth intervals for different locations.

Thanks

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Hi Anu,

1) Parameters such as UCS, RQD, CO3, and Bulk Density sound like I-Data (interval data) with a top and base depth plus a value. Modeling algorithms include Inverse Distance Anisotropic for materials with horizontal continuity and Inverse Distance Isotropic for materials that vary the same way horizontally and vertically. Many geologic settings are anisotropic. Another option to try is Kriging-HB to use horizontal bias. Every data set is different and I suggest trying a couple of different methods to see which ones fit your data.

2) You can import bathymetry data using the Utilities Grid | Import menu in one of several formats: Arc ASCIIGrid, Surfer Grid, GeoSoft GXF, and ZMAP. RockWorks saves the data to an RwGrd file format. If your data are in a different format, use a program like Surfer, Global Mapper, or ArcGIS to convert to a supported format.

After the data are converted, they can be resampled to match the XY resolution of the a solid model.

3) Soil models can be created by loading data into the Lithology table and creating a 3D solid model.

Regards,

Tom B

RockWare Inc

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Hi tom,

1) Thanks so much for your response actually i have the SPT and RQD as interval data and the rest as point data.

2) i saw a blog on the second question but the steps aren't as exactly clear please can you help with that. i have the survey and design files in ASCII format. after importing what are the necessary steps?

Thanks

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Hi NMDC,

If your survey and design data are in XYZ format, you can import them into the Utilities datasheet with the File | Import menu, and create a gridded surface with the Map | Grid-Based Map menu command.

If this procedure does not fit your data, you are welcome to provide more details and copies of your files, and I will take a look.

Regards,

Tom B

RockWare Inc

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