Key technologies of borehole comprehensive geophysical prospecting for advanced detection in directional long drilling of rapid excavation working face
LI Ping
WEI Rong
FAN Tao
ZHAO Rui
JIANG Bici
TIAN Xiaochao
Abstract：The efficient and intelligent production in coal mining necessitates more precise detection of hidden underground disaster-caus-ing factors.Rapid excavation faces challenges in the accuracy and efficiency of detecting coal-rock interfaces,geological structures,and water-bearing anomalies ahead of the working face.To address issues such as limited construction space,strong electromagnetic interfer-ence,and long distance detection anomalies,this study proposes an integrated advanced borehole detection system combining drilling and geophysical methods for areas ahead of tunneling.To enhance radial long distance detection range and anomaly imaging precision,a virtu-al wavefield full-waveform inversion algorithm for pseudo-acoustic media based on wavefield inverse transformation and a three-compon-ent spatial positioning algorithm were developed.These enable borehole Transient Electromagnetic(TEM)methods to achieve intelligent inversion and 3D imaging of concealed water-bearing anomalies near the borehole.Innovative techniques were also introduced for bore-hole radar,including an in-situ method for determining coal-seam radar wave velocity and a spatially constrained migration imaging meth-od guided by borehole trajectory,significantly improving the identification accuracy of coal-rock interfaces and geological structures.To overcome the limitations of single-method detection,a multi-parameter,multi-component integrated borehole detector was developed,combining borehole TEM,radar,and natural gamma methods.The compatibility of simultaneous multi-frequency electromagnetic wave detection was verified.A multi-source data fusion and interpretation platform with multi-borehole comparison and multi-parameter link-age analysis functions was established.This platform enhances geological interpretation accuracy and lithological resolution through col-laborative data inversion,reducing interpretation ambiguity and forming a complete intelligent borehole advance detection and identifica-tion system.Field applications demonstrate that this technology is suitable for rapid excavation in coal mining.It enables precise detection within a radial range of 30 meters over advance distances exceeding 1 000 meters in a single drilling run.This effectively resolves the con-flict between exploration and excavation sequences,significantly improves roadway driving efficiency and safety,and provides robust geo-logical support for the green and high-efficiency development of coal mines.
Keywords：borehole comprehensive geophysical prospectingadvanced detectionrapid excavation working faceborehole transient electromagneticborehole radar
Publication Date：2025-12-31
Online Publishing Date：2026-01-16(First online date of this platform, not the publication date of the document)
Pages：18( 208-225 )