This feature type is used for geomechanical classifaction for rocks according to the Rock Mass Rating (RMR) system develped by Z. T. Bieniawski. It includes properties for each of the six parameters that are used to classify a rock mass with the RMR system as well as the resulting RMR value and the resulting Rock quality class.
Characteristic |
Note |
Name |
Rock Mass Rating |
Path |
\Geotechnics |
Feature type icon |
|
Feature type class |
Regular |
Spatial data support |
Spatial support on observation (SSO) |
Allowed spatial systems |
All |
Allowed Geometry types |
Point, line, polygon |
Allowed contained feature types |
N/A |
Table 1: Characteristics of this feature type
Property structure for type specific feature data
This feature type defines not property structure for type specific feature data.
Property structure for type specific observation data
Property, Property Collection |
Description |
Strength Rating STRENGTH |
Rating of the strength of Intact Rock Material Property type: Numeric Default Value: none Validation rule: ≥ 0 and ≤ 15 Display Options: Decimals: 0 |
RQD Rating RQD |
Rating of the Drill Core Quality Property type: Numeric Default Value: none Validation rule: ≥ 3 and ≤ 20 Display Options: Decimals: 0 |
Discontinuity spacing rating SPACING |
Rating of the Discontinuity spacing Property type: Numeric Default Value: none Validation rule: ≥ 5 and ≤ 20 Display Options: Decimals: 0 |
Discontinuity Length Rating LENGTH |
Persistence Property type: Numeric Default Value: none Validation rule: ≥ 0 and ≤ 6 Display Options: Decimals: 0 |
Discontinuity Separation rating SEPARATION |
Aperture Property type: Numeric Default Value: none Validation rule: ≥ 0 and ≤ 6 Display Options: Decimals: 0 |
Discontinuity Roughness rating ROUGHNESS |
Property type: Numeric Default Value: none Validation rule: ≥ 0 and ≤ 6 Display Options: Decimals: 0 |
Discontinuity Infilling Rating INFILLING |
Gouge Property type: Numeric Default Value: none Validation rule: ≥ 0 and ≤ 6 Display Options: Decimals: 0 |
Discontinuity Weathering rating WEATHERING |
Property type: Numeric Default Value: none Validation rule: ≥ 0 and ≤ 6 Display Options: Decimals: 0 |
Ground water rating GROUNDWATER |
Property type: Numeric Default Value: none Validation rule: ≥ 0 and ≤ 15 Display Options: Decimals: 0 |
Rating adjustment ADJUSTMENT |
Property type: Numeric Default Value: none Validation rule: ≥ -60 and ≤ 0 Display Options: Decimals: 0 |
RMR value RMR |
Rock mass rating value Property type: Numeric Default Value: none Validation rule: ≥ 0 and ≤ 100 Display Options: Decimals: 0 |
Rock Quality Class CLASS |
RMR Rock Quality Property type: Classification |
Table 2: Properties and collections of the type specific observation data property structure
