1. Coal mine underground roof and floor and advanced detection, with an advanced detection distance of 150m (under non-interference conditions); two Exploring the distribution and water content of mining structures from the ground down; three Exploration of sudden water sources in goaf and abandoned small coal mines filled with water;

4. Exploration of karst aquifers, karst collapse columns, and karst collapse caves in the coal seam floor; five Exploration of hidden water conducting structures encountered during excavation; six Exploration of hidden point shaped water conducting structures (collapse columns, poorly sealed boreholes, etc.) within the working face encountered during the mining process; seven Exploration of water conducting fracture zones induced by mining disturbances on the roof and floor.

1. A national safety standard product that meets modern mining safety requirements and is an intelligent and portable mining transient electromagnetic system that integrates reception and transmission; two Lightweight equipment: One person can carry the host, tablet, coil, etc. The integrated host weighs only 2.5kg, and only two people need to cooperate to complete the operation during construction; three Working time: The overall continuous working time shall not be less than 7 hours. The independent working time of the tablet computer shall not be less than 11 hours, and the independent working time of the electromagnetic instrument host shall not be less than 7 hours. 4. Operation mode: The tablet computer and the host communicate through wireless network, and underground operations are all carried out on the tablet end; five Network function: The tablet computer has network and communication functions, which can realize video and voice communication, and the underground data and processing results can be directly uploaded to the surface in the network environment; six Advanced interpretation software system: a full space interpretation software system for underground (underground tunnels, tunnels, etc.) operation, user-friendly, and one click on-site mapping; seven It can be interconnected with Huarui Cloud Data Center for real-time uploading, storage, interpretation, and mapping of exploration data. Provide effective support for the rapid issuance of engineering reports; eight Support fast wired and wireless multi protocol access with coal mine intelligent platform

Exploration content: Identify the water accumulation in the goaf of the bottom plate in front of the roadway; Exploration conclusion: Based on the relevant geological data and on-site conditions of the roadway, according to the visual resistivity results of the geophysical exploration direction of the left side of the 41105 return air duct, there is a relatively low resistance area in the direction of 15 ° to the right of the left side of the 41105 return air duct. The goaf has been drilled and drained, indicating that the bottom plate of the goaf is relatively humid. Drilling verification is required for abnormal areas.

The results of water rich exploration in the internal goaf of a mining face in Shanxi Province: measuring points were arranged in the return airway to explore the internal goaf of the mining face, with a distance of 10m between the measuring points in three directions: top 30 °, bedding 0 °, and bottom 30 °. The following figures show the simulated cross-sectional diagrams of the mine's transient electromagnetic technology for detecting apparent resistivity in the top 30 °, bedding 0 °, and bottom 30 ° directions. The blue area in the figure represents the low resistance abnormal area, and the detection results are consistent with drilling verification, indicating accuracy and reliability.