PROBLEMS OF QUALITY AND STANDARDIZATION OF INITIAL GEOLOGICAL AND GEOMECHANICAL DATA IN GEOLOGICAL-STRUCTURAL AND GEOTECHNICAL MODELING

Abstract

This paper is devoted to: Disclosing the problem of quality of initial geologic and geomechanical data. Comparison of historical materials used for initial assessment of geologic and geomechanical setting with modern approaches to mapping and documentation of mine workings and outcrops. Consideration of modern classifications to convert and standardize historical materials and modern research into an unified system.

Common and internationally accepted abbreviations and rating classifications such as the Barton excavation quality index, the Bieniawski rock mass rating system, and the Hoek-Brown geologic strength index. Bieniawski's RMR rating system is used as a detailed example, but the similar comparative evaluation was carried out for other indicators.

The paper describes the main parameters and variables for classifying a rock massif according to its qualitative indicators, which are found in the source historical materials and are required for classification. Examples of transition from subjective qualitative description of the massif to numerical rating parameters are given. Transition to rating parameters of numerical characterization of the array provides the possibility of machine calculation in interpolation and extrapolation in block models, comparative analysis between sites and predictive analysis on zones and areas of interest with low information availability for the design of additional work before the study of the array.

The main goal of such conversions is to unify all available materials into a single database, to provide rapid conversion between different systems, and to draw up a research program to study the most unstable areas.