Patent ID: 11879327
Assignee: CHINA UNIVERSITY OF MINING AND TECHNOLOGY, BEIJING
Field: Civil engineering (Other fields)
Classification: CPC E | IPC E

Claim 14:
15. A method of transient electromagnetic advanced detection, comprising:
placing a drill rod in a borehole;
wherein, a probe is located inside the borehole, and an electromagnetic signal transmitter is located at an orifice of the borehole;
transmitting, by the electromagnetic signal transmitter, a transient electromagnetic signal according to a detection control signal from a detection host;
receiving, by the probe, a secondary magnetic signal excited by the transient electromagnetic signal via surrounding rocks;
generating, by the probe, a drilling trajectory based on positions of the probe;
sending, by the probe, the secondary magnetic signal and the drilling trajectory to the detection host via a communication device;
determining, by the detection host, three-dimensional electromagnetic signal intensities of coordinate points according to the secondary magnetic signal and the drilling trajectory; and
determining, by the detection host, a position of a harmful geological body in the borehole according to the three-dimensional electromagnetic signal intensities.