复杂裂隙岩体环境下巷道轴线走向优化研究

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Abstract Optimization selection of the axis strike of roadway under the environment of fractured rock mass is important to the safety of the excavation and the long-term use of roadway，but there are two short coming in existing studies，i.e. the representative structural plane group selection and evaluation indicators is not scientific. Taking the roadways under 4 fractured rock test areas of the ore body No.92 in Tongkeng mine as engineering background，through making full use of the respective advantages of GeneralBlock procedures developed by the general block theory and Unwedge code developed by the key block theory，the selection problem of the representative structural plane group was solved and the number of direct falling block body and the minimum safety factor in line with the actual engineering was used as the block stability evaluation indicator. Thus the study of the optimization for the axis strike of roadway under complicated fractured rock mass was carried out. The results show that the techniques developed could determine quickly the test area #1，#2，#3 and #4 optimal roadway axis strike 35°，108°，37° and 32° respectively. The study results can provide reference for the optimization of the roadway axis strike in other complex fractured rock mass.

Key words： mining engineering fractured rock mass roadway axis strike optimization block theory

Received: 24 May 2013

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https://rockmech.whrsm.ac.cn/EN/Y2014/V33/IS1/2735

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