物探与化探2018，Vol.42Issue(2)：412-421,10.DOI:10.11720/wtyht.2018.2.28
基于光纤电流传感的BEAM隧道超前地质预报方法
BEAM tunnel advanced geological prediction method based on optical fiber current sensing
摘要
Abstract
Low contact resistance between the cutterhead and the shield leads to the loss of insulation between the detecting current and the guarding current in BEAM-INTEGRAL method and generates the leak current. Experiments indicate that the leak current reduces the calculation accuracy of apparent resistivity and causes the omission of geological disasters in advanced prediction. In order to elimi-nate negative effects of the leakage current,we propose an advanced geological prediction method based on optical fiber current sensing. This method can measure the leakage current by a fiber current sensor,which is attached on the main bearing of the TBM. The experi-ment reveals that this method can eliminate the negative influence of the leakage current on the apparent resistance measurement and improve geological advanced prediction's detecting precision compared with BEAM-INTEGRAL method.关键词
隧道超前地质预报/屏蔽电流法/光纤电流传感器/法拉第磁致旋光效应/安培环路定理Key words
tunnel advanced geological prediction/shielded current method/optical fiber current sensor/faraday magneto-optical rota-tion effect/ampere circuit theorem分类
天文与地球科学引用本文复制引用
高昕星,赵斌,路丽勇,喻杰,徐娅..基于光纤电流传感的BEAM隧道超前地质预报方法[J].物探与化探,2018,42(2):412-421,10.基金项目
国家重点基础研究发展计划(973计划)项目"硬岩掘进装备的关键基础问题"(2013CB035400) （973计划）
