Large artificial or natural caves hidden underground can have a disruptive impact on major engineering construction projects.How to reduce drilling workload and thoroughly determine their distribution has always been a challenge in engineering exploration.Traditional drilling methods for tracking the direction of hidden underground caves are time-consuming

labor-intensive

and costly.In this paper

a drilling imaging system is developed.The imaging probe is inserted into the borehole and placed in the underground cave to determine the direction of the underground cave.Combined with a small amount of drilling work for tracking and verification

the distribution of hidden underground caves can be determined

solving the problem of underground cave exploration.The application of a self-made drilling imaging system in the exploration of hidden underground air defense caves in 2×660 MW “high pressure and small” coal-fired power plant has shown high efficiency

low cost

and reliable results.It can be widely used in the exploration of various hidden underground caves such air defense caves and karst caves.