TBM开挖隧洞微震监测系统构建及方案优化
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摘要
针对TBM开挖工作面实施微震监测过程中存在的空间狭窄、钻孔不便、线缆易损等诸多困难,为了实现微震监测系统的稳定运行,确保数据采集的连续性、完整性和数据传输的实时性,在引汉济渭工程秦岭输水隧洞越岭段3号支洞的TBM开挖工作面,经过多次数据比对、优化改进,摸索出一套更适合TBM开挖工作面开展移动式微震监测的系统构建方案。通过6个月的连续监测表明:使用该方案,监测系统与TBM彻底分离,互不影响,正常供电时数据连续采集率为100%;数据传输稳定可靠,外部网络正常时仅有1 d因路由器供电故障而导致数据无法传输,故障率为0.55%;传感器线缆没有出现意外损坏,故障率为0,为岩爆风险预测提供了充分的数据保障。
For TBM excavation working face in the process of implementation of micro-seismic monitoring the space is narrow,borehole inconvenience vulnerability,cables,data transmission and many other difficulties,in order to realize the stable operation of the micro-seismic monitoring system to ensure the continuity of data acquisition,integrity and the real-time performance of data transmission,in No.3 tunnel TBM excavation working face of Hanjiang-to-Weihe River Water Diversion Project,after several data comparison and optimization improvements,it had figured out a plan that was more suitable for building mobile fading earthquake monitoring system in TBM excavation working face.Through continuous monitoring for 6 months,it is shown that the monitoring system is completely separated from TBM without affecting each other.When the power supply is normal,the continuous data acquisition rate is 100%.Data transmission is stable and reliable.When the external network is normal,the data cannot be transmitted due to the power failure of the router for only 1 day,so the failure rate is 0.55%.There is no accidental damage to the sensor cable and the failure rate is 0,which provides sufficient data support for rock burst risk prediction.
For TBM excavation working face in the process of implementation of micro-seismic monitoring the space is narrow,borehole inconvenience vulnerability,cables,data transmission and many other difficulties,in order to realize the stable operation of the micro-seismic monitoring system to ensure the continuity of data acquisition,integrity and the real-time performance of data transmission,in No.3 tunnel TBM excavation working face of Hanjiang-to-Weihe River Water Diversion Project,after several data comparison and optimization improvements,it had figured out a plan that was more suitable for building mobile fading earthquake monitoring system in TBM excavation working face.Through continuous monitoring for 6 months,it is shown that the monitoring system is completely separated from TBM without affecting each other.When the power supply is normal,the continuous data acquisition rate is 100%.Data transmission is stable and reliable.When the external network is normal,the data cannot be transmitted due to the power failure of the router for only 1 day,so the failure rate is 0.55%.There is no accidental damage to the sensor cable and the failure rate is 0,which provides sufficient data support for rock burst risk prediction.
引文
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[15]衡献伟.微震监测系统传感器安装技术及应用[J].煤炭技术,2015,34(12):213-214.
[2]张楚旋,李夕兵,董陇军,等.基于微震监测的岩体失稳智能预报[J].中国安全生产科学技术,2016,12(3):5-9.
[3]揭秉辉,赵周能,陈炳瑞,等.基于微震监测技术的深埋长大隧洞群岩爆时空分布规律分析[J].长江科学院院报,2012,29(9):69-73.
[4]赵周能,冯夏庭,肖亚勋,等.不同开挖方式下深埋隧洞微震特性与岩爆风险分析[J].岩土工程学报,2016,38(5):867-876.
[5]于群,唐春安,李连崇,等.基于微震监测的锦屏二级水电站深埋隧洞岩爆孕育过程分析[J].岩土工程学报,2014,36(11):2315-2322.
[6]马天辉,唐春安,唐烈先,等.基于微震监测技术的岩爆预测机制研究[J].岩石力学与工程学报,2016,35(3):470-483.
[7]吴世勇,周济芳,陈炳瑞,等.锦屏二级水电站引水隧洞TBM开挖方案对岩爆风险影响研究[J].岩石力学与工程学报,2015,34(4):728-734.
[8]张文东,马天辉,唐春安,等.锦屏二级水电站引水隧洞岩爆特征及微震监测规律研究[J].岩石力学与工程学报,2014,33(2):339-348.
[9]陈炳瑞,冯夏庭,曾雄辉,等.深埋隧洞TBM掘进微震实时监测与特征分析[J].岩石力学与工程学报,2011,30(2):275-283.
[10]冯夏庭,陈炳瑞,明华军,等.深埋隧洞岩爆孕育规律与机制:即时型岩爆[J].岩石力学与工程学报,2012,31(3):433-444.
[11]于群,唐春安,李连崇,等.深埋硬岩隧洞微震监测及微震活动特征分析[J].哈尔滨工程大学学报,2015,34(11):1465-1470.
[12]赵志强.秦岭引水隧洞TBM施工段岩爆预防与治理[J].西部探矿工程,2016(10):170-172.
[13]李元来,王俊.引汉济渭工程秦岭输水隧洞4#施工支洞岩爆预测及预防处理措施[J].水利水电技术,2017,48(8):96-100.
[14]张楚旋,李夕兵,董陇军,等.微震监测传感器布设方案评价模型及应用[J].东北大学学报(自然科学版),2016,37(4):594-599.
[15]衡献伟.微震监测系统传感器安装技术及应用[J].煤炭技术,2015,34(12):213-214.