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Tunnel classification support method of soft and hard layered rock mass and its application

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  • Zijin Mining Group Co.,Ltd.|Zijin Mining Group Co.,Ltd.&Fuyun Jinshan Mining and Metallurgy Co.,Ltd.|Zijin Mining Group Co.,Ltd.&Fuyun Jinshan Mining and Metallurgy Co.,Ltd.|Fuyun Jinshan Mining and Metallurgy Co.,Ltd.
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Abstract:

In light of the problems such as large differences in roadway stability,uneven roadway support quality,high support cost,and slow tunneling speed,a comprehensive method was adopted to classify roadway surrounding rock of soft and hard layered rock mass.Combined with technical standard requirements and typical roadway support engineering practice experience,the support modes of Ⅰ-Ⅴ grade roadway of soft and hard layered rock mass and their parameter index range values were proposed.Under the engineering geological conditions of typical soft and hard layered rock mass in the east section of Mengku Iron Deposit,the design and construction of roadway classification support are simple and efficient,and the application effect is obvious.

Keywords:

roadway classification support;rock mass classification;support means;support parameter;support flow;soft and hard layered rock mass