APPLICATION OF EXTENICS THEORY TO EVALUATION OF MAJI HYDROPOWER STATION ROCK QUALITY

The extension engineering method is combined with rock quality evaluation, apply it to rock mass quality evaluation which data collected from an adit at Maji hydropower station dam. On the basis of the theory of extenics, Simultaneously, introducing precedence chart method to determine the weights of the evaluation indexes, and a matter-element model calculating procedure is proposed. Rock of each section in PD105 is evaluated by using the model, and the result consists with the law of site. Compared with the evaluation results by the former RMRmethod, the rock quality evaluation results obtained by the extenics method can more precisely reflect the engineering characteristics of tunnel rock.