Coal mine underground space terrestrial heat utilization system

The invention discloses a coal mine underground space terrestrial heat utilization system, and belongs to the field of terrestrial heat development and utilization, the coal mine underground space terrestrial heat utilization system comprises a bottom plate, a user side and a heat exchange pipe, the bottom plate is provided with an upper cover plate, the upper cover plate is provided with a lowering assembly, the lowering assembly comprises a lowering sliding frame, and the lower end of the lowering sliding frame is fixedly provided with an extension fixing frame; two transverse adjusting assemblies and two vertical adjusting assemblies are arranged on the extension fixing frame, a heat exchange loop can be set to be a closed loop through the heat exchange pipe, water pumping heat exchange from the underground space is not needed, impurities in water in the underground space are prevented from blocking a water pumping pipeline, and the service life of the water pumping pipeline is prolonged. The transverse ad