CAJ | 학술논문

锦屏二级水电站1#，3#引水隧洞采用 TBM 掘进，中部深埋洞段岩爆风险突出。为制定合理可行的掘进方案与岩爆防治措施，在前人研究基础上，结合工程实际情况，采用多种数值分析手段，评价不同形式导洞开掘，对降低岩爆风险的影响。3种导洞开挖方式均可以显著地降低TBM 掘进的岩爆风险，选择何种形式的导洞主要从设备和经济效益角度进行决策。据此提出高地应力区大直径 TBM 掘进岩爆风险控制措施，施工中结合钻爆法导洞预处理、应力解除爆破并辅以及时、系统、高质量的支护，降低岩爆风险，确保施工及结构安全。
금병이급수전참1#，3#인수수동채용 TBM 굴진，중부심매동단암폭풍험돌출。위제정합리가행적굴진방안여암폭방치조시，재전인연구기출상，결합공정실제정황，채용다충수치분석수단，평개불동형식도동개굴，대강저암폭풍험적영향。3충도동개알방식균가이현저지강저TBM 굴진적암폭풍험，선택하충형식적도동주요종설비화경제효익각도진행결책。거차제출고지응력구대직경 TBM 굴진암폭풍험공제조시，시공중결합찬폭법도동예처리、응력해제폭파병보이급시、계통、고질량적지호，강저암폭풍험，학보시공급결구안전。
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.