Abstract：Research purposes: Taking the Heluoshan Tunnel of the Dali － Ruili Railway as an example，the study was done on the advanced geological forecast technology for the tunnel in fractured basalt area with tuff． Based on the advanced forecasted data，the forecast conclusion was drawn up and the appropriate engineering measures were offered for directing the tunnel construction to reduce and avoid the risk of geological disaster during construction．
Research conclusions: ( 1) During the geological survey，the high － density resistivity method should used for shallow section of the tunnel and the CSAMT sounding should be used for the deep － buried section of the tunnel for the advanced geological forecast to the ground surface． During construction，the geological survey method，TSP method and advanced boring should be used in tunnel for the advanced geological forecast． ( 2) Based on the various data of the advanced geological forecast of all phases obtained by all means，the forecast conclusion is draw up and the proposal on the construction is offered to direct the construction． ( 3) The work procedure of the advanced geological forecast is presented．
杨 英. 碎裂玄武岩夹凝灰岩型隧道超前地质预报技术探讨[J]. 铁道工程学报, 2011, 28(8): 30-35.
YANG Ying. Discussion on Advanced Geological Forecast Technology for Tunnel in Fractured Basalt Area with Tuff. 铁道工程学报, 2011, 28(8): 30-35.
Yang Ying． The Fractured Tuff in Basalt Tunnel Characteristics and The Constuction Countermeasures along Dali － Lijiang Railway［J］． Journal of Railway Engineering Society，2007．
2011, Vol. 28 
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