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Gold Science and Technology ›› 2017, Vol. 25 ›› Issue (4): 39-45.doi: 10.11872/j.issn.1005-2518.2017.04.039

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Extension Evaluation Model of Rock Mass Quality for Underground Mine Based on Optimal Combination Weighting

HU Jianhua，AI Zihua   

  1. School of Resources and Safety Engineering，Central South University，Changsha    410083，Hunan，China
  • Received:2015-12-29 Revised:2017-03-20 Online:2017-08-30 Published:2017-10-30

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Abstract:

The classification identification of rock mass quality is the basis of mine engineering design，construction and support，and has vital significance in rock mass engineering application.Based on extensional theory，taking rock engineering of super-large scale underground stope in Sijiaying iron mine as an example，the evaluation matter element model of rock mass quality was established according on factors，i.e. rock uniaxial compressive strengthen （RC），rock quality designation（RQD），strengthen coefficient of structural plane（Jf），joints distance（Jd）， groundwater condition （W），integrity coefficient（Kv）.The optimal combination of AHP and entropy method based on optimal combination weighting law used to calculate weight aggregation of evaluating factors is proposed.The study shows that：（1）The engineering quality characteristic value of rock mass to be evaluated are obtained，realizes the engineering rock mass category and objectively reflect the difference between rock mass and  adjacent rock mass level，provides the basis design parameters for mine rock project；（2）Based on the optimal combination weight coefficient，achieve combination of multiple weight values，reduce the error between different weights，improve the accuracy of rock quality evaluation；（3）The evaluation result is consistent with the results by engineering geological RMR method，analytic hierarchy process and entropy weight method，so evaluation result is reliable；（4）Based on the maximum square sum of deviations，the dispersion between evaluation results is high，so it is more conductive to decision-making.

Key words:  rock quality evaluation, optimal combination, weighting coefficients, matter element model, extension theory

CLC Number: 

  • TD313

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