Mine geothermal exploitation and utilization device and method with solid-fluid coupling coordinated cooling

Abstract

The invention discloses a mine geothermal exploitation and utilization device with solid-fluid coupling coordinated cooling. The device comprises a mine geothermal exploitation and utilization deviceand a stope air treatment and transportation device. The mine geothermal exploitation and utilization device comprises a multilayer heat recovery filling body formed during filling each layer, a U-shaped heat exchange coil vertically laid in the heat recovery filling body, a water dispensing and collecting system disposed on the ground, and a water supply and return system for connecting the waterdispensing and collecting system and the U-shaped heat exchange coil. The stope air treatment and transportation device includes a ground cold water treatment device, an air treatment unit, and an air supply pipe for supplying fresh air into a mine recovery space. The invention also discloses a mine geothermal exploitation and utilization method with solid-flow coupling coordinated cooling. Through the solid-fluid coupling coordinated cooling effect, the device and method can achieve a good stope cooling effect and create a comfortable downhole thermal environment, improve the exergy value ofa underground heat exchange system, have high practicability and high value of promotion and application.

Description

technical field [0001] The invention belongs to the technical field of deep mine mining, and in particular relates to a solid-fluid coupling cooperative cooling mine geothermal mining and utilization device and method. Background technique [0002] With social development and increasing demand for resources, shallow coal resources are gradually decreasing or even exhausted. In order to ensure resource security and expand economic and social development space, countries around the world have entered the stage of deep resource mining. However, with the increase of mining depth, the high temperature heat damage induced by the deep ground temperature has become more and more serious, which has become an important factor restricting the safe and efficient mining of deep deposit resources. The existing statistical data show that the average mining depth in Germany is 900m, the average ground temperature is 41°C, the deepest is 1712m, and the highest ground temperature is 60°C; Th...

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Problems solved by technology

However, there is still a lack of such a technical method in the prior art

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