(1. HydroChina Huadong Engineering Corporation，Hangzhou，Zhejiang 310014，China；2. State Key Laboratory of Geomechanics and Geotechnical Engineering，Institute of Rock and Soil Mechanics，Chinese Academy of Sciences，Wuhan，Hubei 430071，China；3. HydroChina Itasca Research and Development Center，Hangzhou，Zhejiang 310014，China)
Abstract：Water diversion tunnels #1 and #3 of Jinping II hydropower station are bored by tunnel boring machine(TBM). The rockburst risk is high in the middle alignment. For the purpose of establishing reasonable boring scheme and rockburst control measurement，based on previous researches，different numerical methods are used to evaluate different pilot boring schemes? effects on reducing the rockburst risk，combining with actual situation. All these three pilot boring schemes can obviously reduce the rockburst risk. The selection of pilot boring schemes depends on the equipment and economic benefit factors. So，rockburst risk control measurements for large diameter TBM boring in high stress region are proposed. During TBM boring，the measurements of pilot，stress relieving blasting，assisting timely，systemic and high quality support are applied to reduce rockburst risk and ensure construction and structure safety.
肖亚勋，冯夏庭，陈炳瑞，等. 深埋隧洞极强岩爆段隧道掘进机半导洞掘进岩爆风险研究[J]. 岩土力学，2011，32(10)：3 111-3 118. (XIAO Yaxun，FENG Xiating，CHEN Bingrui，et al. Rockburst risk of tunnel boring machine part-pilot excavation in very strong rockburst section of deep hard tunnel[J]. Rock and Soil Mechanics，2011，32(10)：3 111-3 118.(in Chinese))
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2013, Vol. 32 
