1) DC advanced detection
直流电法超前探测
2) underground DC electricity leading exploration technology
直流电法超前探测技术
3) direct current electric sounding
直流电测探
4) advanced detection
超前探测
1.
By adopting some technology of advanced detection,adding temporary invert,sleeve valve pipe and lock foot bolts,the construction of the tunnel is completed safely and successfully.
暗挖区间隧道通过采用超前探测、增设临时仰拱、袖阀管、锁脚锚管等技术措施,安全、顺利完成了北四环路和北辰桥段的施工。
2.
Sector detection technology was used to enhance the explanation accuracy of mine transient electromagnetic method in advanced detection instead of conventional survey.
用扇形探测技术代替了常规的测量方法以提高矿井瞬变电磁法超前探测资料的解释精度。
3.
The results show that advanced detection apparatus DTC-150 can detect geologic formation in front of the mine excavation 100 m away,and can more accurately detect faults,rock fissures,rock broken cinctures and water-rich situation,and the collection velocity can be used to classify the wall rock.
为了长距离超前探测煤矿井下的地质构造情况,应用多波多分量地震勘探理论,介绍DTC-150井下长距离超前探测仪的基本原理,研究该仪器的井下测量方法与资料处理解释原则,并应用该仪器对不同的矿井进行超前预报探测实验。
5) advance detection
超前探测
1.
The portable mine detector,which is used to make advance detection of the front small structure of the mining faces by utilizing the diffracted wave,has become an effective auxiliary tool for the forecasting in the tunnelling.
便携式矿井探测仪是应用绕射波来超前探测巷道掌子面前方小构造的,在速度低于上下围岩的中等速度的特定层位中,地震波将在前方的小断层或小构造处反射,以绕射波形式返回到检波器,其最远的探测距离达184m,成为在掘进巷道中预测预报的有效辅助工具。
6) pre-detection
超前探测
1.
The advantages of Rayleigh wave for water-bearing fault belt pre-detection in the process of tunnel construction by analyzing an example are introduced on the basis of expounding Rayleigh wave detection basic theory,and a kind of simple,efficient new technique for pre-detecting water-bearing fault belt in the process of tunnel construction is displayed.
通过实例分析,介绍瑞利波超前探测施工隧道含水断层破碎带的优点,为在隧道施工过程中,超前预报含水断层破碎带展示了一种简便、高效的新技术。
补充资料：直流
直流
Direct current
直流(direet。urrent) ，仅按一个方向流过电路或设备的电流称为直流。与交流电压相比，直流电压的极性是不变的。直流电流相当于电荷沿着闭合的电路以不变的方向流动或位移。直流电流和电压的幅值可以恒定，也可以随时间变化。 蓄电池和旋转发电机产生幅值恒定的额定直流电压，整流器产生幅值随时间而变的直流电压。整流器把交流电压变换为脉动的直流电压。 通常电站不是广泛地将直流电输配给一般用户，相反，在需要直流电(d。)能的场所，是把商业上合用的交流电(ac)能整流为直流电能。 「罗布(D.D.Robb)撰]
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条